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Urbańczyk T, Koperski J. Ro-vibrational cooling of diatomic molecules Cd2 and Yb2: rotational energy structure included. Mol Phys 2019. [DOI: 10.1080/00268976.2019.1694712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Tomasz Urbańczyk
- Smoluchowski Institute of Physcics, Jagiellonian University, Kraków, Poland
| | - Jarosław Koperski
- Smoluchowski Institute of Physcics, Jagiellonian University, Kraków, Poland
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2
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Vendrell O. Collective Jahn-Teller Interactions through Light-Matter Coupling in a Cavity. PHYSICAL REVIEW LETTERS 2018; 121:253001. [PMID: 30608830 DOI: 10.1103/physrevlett.121.253001] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/25/2018] [Indexed: 05/20/2023]
Abstract
The ultrafast nonradiative relaxation of a molecular ensemble coupled to a cavity mode is considered theoretically and by real-time quantum dynamics. For equal coupling strength of single molecules to the cavity mode, the nonradiative relaxation rate from the upper to the lower polariton states is found to strongly depend on the number of coupled molecules. The coupling of both bright and dark polaritonic states among each other constitutes a special case of (pseudo-)Jahn-Teller interactions involving collective displacements the internal coordinates of the molecules in the ensemble, and the strength of the first order vibronic coupling depends exclusively on the gradient of the energy gaps between molecular electronic states. For N>2 molecules, the N-1 dark light-matter states between the two optically active polaritons feature true collective conical intersection crossings, whose location depends on the internal atomic coordinates of each molecule in the ensemble, and which contribute to the ultrafast nonradiative decay from the upper polariton.
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Affiliation(s)
- Oriol Vendrell
- Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark and Theoretische Chemie, Physikalisch-Chemisches Institut, Universität Heidelberg, INF 229, 69120 Heidelberg, Germany
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3
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Vendrell O. Coherent dynamics in cavity femtochemistry: Application of the multi-configuration time-dependent Hartree method. Chem Phys 2018. [DOI: 10.1016/j.chemphys.2018.02.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Kowalewski M, Bennett K, Mukamel S. Non-adiabatic dynamics of molecules in optical cavities. J Chem Phys 2016; 144:054309. [PMID: 26851923 DOI: 10.1063/1.4941053] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Strong coupling of molecules to the vacuum field of micro cavities can modify the potential energy surfaces thereby opening new photophysical and photochemical reaction pathways. While the influence of laser fields is usually described in terms of classical field, coupling to the vacuum state of a cavity has to be described in terms of dressed photon-matter states (polaritons) which require quantized fields. We present a derivation of the non-adiabatic couplings for single molecules in the strong coupling regime suitable for the calculation of the dressed state dynamics. The formalism allows to use quantities readily accessible from quantum chemistry codes like the adiabatic potential energy surfaces and dipole moments to carry out wave packet simulations in the dressed basis. The implications for photochemistry are demonstrated for a set of model systems representing typical situations found in molecules.
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Affiliation(s)
- Markus Kowalewski
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
| | - Kochise Bennett
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
| | - Shaul Mukamel
- Department of Chemistry, University of California, Irvine, California 92697-2025, USA
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5
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Xu M, Jäger SB, Schütz S, Cooper J, Morigi G, Holland MJ. Supercooling of Atoms in an Optical Resonator. PHYSICAL REVIEW LETTERS 2016; 116:153002. [PMID: 27127966 DOI: 10.1103/physrevlett.116.153002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Indexed: 06/05/2023]
Abstract
We investigate laser cooling of an ensemble of atoms in an optical cavity. We demonstrate that when atomic dipoles are synchronized in the regime of steady-state superradiance, the motion of the atoms may be subject to a giant frictional force leading to potentially very low temperatures. The ultimate temperature limits are determined by a modified atomic linewidth, which can be orders of magnitude smaller than the cavity linewidth. The cooling rate is enhanced by the superradiant emission into the cavity mode allowing reasonable cooling rates even for dipolar transitions with ultranarrow linewidth.
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Affiliation(s)
- Minghui Xu
- JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA
- Center for Theory of Quantum Matter, University of Colorado, Boulder, Colorado 80309, USA
| | - Simon B Jäger
- Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - S Schütz
- Center for Theory of Quantum Matter, University of Colorado, Boulder, Colorado 80309, USA
| | - J Cooper
- JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA
| | - Giovanna Morigi
- Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - M J Holland
- JILA, National Institute of Standards and Technology and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA
- Center for Theory of Quantum Matter, University of Colorado, Boulder, Colorado 80309, USA
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6
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Morigi G, Eschner J, Cormick C, Lin Y, Leibfried D, Wineland DJ. Dissipative Quantum Control of a Spin Chain. PHYSICAL REVIEW LETTERS 2015; 115:200502. [PMID: 26613425 DOI: 10.1103/physrevlett.115.200502] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2015] [Indexed: 06/05/2023]
Abstract
A protocol is discussed for preparing a spin chain in a generic many-body state in the asymptotic limit of tailored nonunitary dynamics. The dynamics require the spectral resolution of the target state, optimized coherent pulses, engineered dissipation, and feedback. As an example, we discuss the preparation of an entangled antiferromagnetic state, and argue that the procedure can be applied to chains of trapped ions or Rydberg atoms.
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Affiliation(s)
- Giovanna Morigi
- Theoretische Physik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - Jürgen Eschner
- Experimentalphysik, Universität des Saarlandes, D-66123 Saarbrücken, Germany
| | - Cecilia Cormick
- IFEG, CONICET and Universidad Nacional de Córdoba, Ciudad Universitaria, X5016LAE Córdoba, Argentina
| | - Yiheng Lin
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - Dietrich Leibfried
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
| | - David J Wineland
- National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA
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7
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Bera S, Motwani B, Singh TP, Ulbricht H. A proposal for the experimental detection of CSL induced random walk. Sci Rep 2015; 5:7664. [PMID: 25563619 PMCID: PMC4288224 DOI: 10.1038/srep07664] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 12/03/2014] [Indexed: 11/13/2022] Open
Abstract
Continuous Spontaneous Localization (CSL) is one possible explanation for dynamically induced collapse of the wave-function during a quantum measurement. The collapse is mediated by a stochastic non-linear modification of the Schrödinger equation. A consequence of the CSL mechanism is an extremely tiny violation of energy-momentum conservation, which can, in principle, be detected in the laboratory via the random diffusion of a particle induced by the stochastic collapse mechanism. In a paper in 2003, Collett and Pearle investigated the translational CSL diffusion of a sphere, and the rotational CSL diffusion of a disc, and showed that this effect dominates over the ambient environmental noise at low temperatures and extremely low pressures (about ten-thousandth of a pico-Torr). In the present paper, we revisit their analysis and argue that this stringent condition on pressure can be relaxed, and that the CSL effect can be seen at the pressure of about a pico-Torr. A similar analysis is provided for diffusion produced by gravity-induced decoherence, where the effect is typically much weaker than CSL. We also discuss the CSL induced random displacement of a quantum oscillator. Lastly, we propose possible experimental set-ups justifying that CSL diffusion is indeed measurable with the current technology.
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Affiliation(s)
- Sayantani Bera
- Tata Institute of Fundamental Research Homi Bhabha Road Mumbai 400005 India
| | - Bhawna Motwani
- Department of Physics Indian Institute of Technology Roorkee 247667 India
| | - Tejinder P Singh
- Tata Institute of Fundamental Research Homi Bhabha Road Mumbai 400005 India
| | - Hendrik Ulbricht
- School of Physics and Astronomy University of Southampton SO17 1BJ UK
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8
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Kessler H, Klinder J, Wolke M, Hemmerich A. Steering matter wave superradiance with an ultranarrow-band optical cavity. PHYSICAL REVIEW LETTERS 2014; 113:070404. [PMID: 25170694 DOI: 10.1103/physrevlett.113.070404] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Indexed: 06/03/2023]
Abstract
A superfluid atomic gas is prepared inside an optical resonator with an ultranarrow bandwidth on the order of the single photon recoil energy. When a monochromatic off-resonant laser beam irradiates the atoms, above a critical intensity the cavity emits superradiant light pulses with a duration on the order of its photon storage time. The atoms are collectively scattered into coherent superpositions of discrete momentum states, which can be precisely controlled by adjusting the cavity resonance frequency. With appropriate pulse sequences the entire atomic sample can be collectively accelerated or decelerated by multiples of two recoil momenta. The instability boundary for the onset of matter wave superradiance is recorded and its main features are explained by a mean field model.
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Affiliation(s)
- H Kessler
- Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J Klinder
- Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - M Wolke
- Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - A Hemmerich
- Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
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9
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Sames C, Chibani H, Hamsen C, Altin PA, Wilk T, Rempe G. Antiresonance phase shift in strongly coupled cavity QED. PHYSICAL REVIEW LETTERS 2014; 112:043601. [PMID: 24580448 DOI: 10.1103/physrevlett.112.043601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Indexed: 06/03/2023]
Abstract
We investigate phase shifts in the strong coupling regime of single-atom cavity quantum electrodynamics. On the light transmitted through the system, we observe a phase shift associated with an antiresonance and show that both its frequency and width depend solely on the atom, despite the strong coupling to the cavity. This shift is optically controllable and reaches 140°--the largest ever reported for a single emitter. Our result offers a new technique for the characterization of complex integrated quantum circuits.
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Affiliation(s)
- C Sames
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
| | - H Chibani
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
| | - C Hamsen
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
| | - P A Altin
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
| | - T Wilk
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
| | - G Rempe
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, D-85748 Garching, Germany
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10
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Affiliation(s)
- Mikhail Lemeshko
- a ITAMP, Harvard-Smithsonian Center for Astrophysics , Cambridge , MA , 02138 , USA
- b Physics Department , Harvard University , Cambridge , MA , 02138 , USA
- c Kavli Institute for Theoretical Physics , University of California , Santa Barbara , CA , 93106 , USA
| | - Roman V. Krems
- c Kavli Institute for Theoretical Physics , University of California , Santa Barbara , CA , 93106 , USA
- d Department of Chemistry , University of British Columbia , BC V6T 1Z1, Vancouver , Canada
| | - John M. Doyle
- b Physics Department , Harvard University , Cambridge , MA , 02138 , USA
| | - Sabre Kais
- e Departments of Chemistry and Physics , Purdue University , West Lafayette , IN , 47907 , USA
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11
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Manai I, Horchani R, Hamamda M, Fioretti A, Allegrini M, Lignier H, Pillet P, Comparat D. Laser cooling of rotation and vibration by optical pumping. Mol Phys 2013. [DOI: 10.1080/00268976.2013.813980] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- I. Manai
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
| | - R. Horchani
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
| | - M. Hamamda
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
| | - A. Fioretti
- b Istituto Nazionale di Ottica , INO-CNR, U. O. S. Pisa “Adriano Gozzini” Via Moruzzi 1 , Pisa , 56124 , Italy
| | - M. Allegrini
- c Dipartimento di Fisica , Università di Pisa and INO-CNR Sezione di Pisa , Largo Pontecorvo 3, Pisa , 56127 , Italy
| | - H. Lignier
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
| | - P. Pillet
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
| | - D. Comparat
- a Laboratoire Aimé Cotton, CNRS , Université Paris-Sud 11 , ENS Cachan, Bât 505, Campus d’Orsay , 91405 , Orsay , France
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12
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Yi Z, Gu WJ, Li GX. Ground-state cooling for a trapped atom using cavity-induced double electromagnetically induced transparency. OPTICS EXPRESS 2013; 21:3445-3462. [PMID: 23481803 DOI: 10.1364/oe.21.003445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We propose a cooling scheme for a trapped atom using the phenomenon of cavity-induced double electromagnetically induced transparency (EIT), where the atom comprising of four levels in tripod configuration is confined inside a high-finesse optical cavity. By exploiting one cavity-induced EIT, which involves one cavity photon and two laser photons, carrier transition can be eliminated due to the quantum destructive interference of excitation paths. Heating process originated from blue-sideband transition mediated by cavity field can also be prohibited due to the destructive quantum interference with the additional transition between the additional ground state and the excited state. As a consequence, the trapped atom can be cooled to the motional ground state in the leading order of the Lamb-Dicke parameters. In addition, the cooling rate is of the same order of magnitude as that obtained in the cavity-induced single EIT scheme.
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Affiliation(s)
- Zhen Yi
- Department of Physics, Huazhong Normal University, Wuhan 430079, China
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13
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Abstract
Conventional laser cooling relies on repeated electronic excitations by near-resonant light, which constrains its area of application to a selected number of atomic species prepared at moderate particle densities. Optical cavities with sufficiently large Purcell factors allow for laser cooling schemes, avoiding these limitations. Here, we report on an atom-cavity system, combining a Purcell factor above 40 with a cavity bandwidth below the recoil frequency associated with the kinetic energy transfer in a single photon scattering event. This lets us access a yet-unexplored regime of atom-cavity interactions, in which the atomic motion can be manipulated by targeted dissipation with sub-recoil resolution. We demonstrate cavity-induced heating of a Bose-Einstein condensate and subsequent cooling at particle densities and temperatures incompatible with conventional laser cooling.
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14
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van de Meerakker SYT, Bethlem HL, Vanhaecke N, Meijer G. Manipulation and Control of Molecular Beams. Chem Rev 2012; 112:4828-78. [DOI: 10.1021/cr200349r] [Citation(s) in RCA: 247] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Hendrick L. Bethlem
- Institute for Lasers, Life and
Biophotonics, VU University Amsterdam,
De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Nicolas Vanhaecke
- Laboratoire Aimé Cotton, CNRS, Bâtiment 505, Université Paris-Sud,
91405 Orsay, France
| | - Gerard Meijer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin,
Germany
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15
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Englert BGU, Mielenz M, Sommer C, Bayerl J, Motsch M, Pinkse PWH, Rempe G, Zeppenfeld M. Storage and adiabatic cooling of polar molecules in a microstructured trap. PHYSICAL REVIEW LETTERS 2011; 107:263003. [PMID: 22243155 DOI: 10.1103/physrevlett.107.263003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2011] [Revised: 09/23/2011] [Indexed: 05/31/2023]
Abstract
We present a versatile electric trap for the exploration of a wide range of quantum phenomena in the interaction between polar molecules. The trap combines tunable fields, homogeneous over most of the trap volume, with steep gradient fields at the trap boundary. An initial sample of up to 10(8), CH(3)F molecules is trapped for as long as 60 s, with a 1/e storage time of 12 s. Adiabatic cooling down to 120 mK is achieved by slowly expanding the trap volume. The trap combines all ingredients for opto-electrical cooling, which, together with the extraordinarily long storage times, brings field-controlled quantum-mechanical collision and reaction experiments within reach.
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Affiliation(s)
- B G U Englert
- Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany
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Schleier-Smith MH, Leroux ID, Zhang H, Van Camp MA, Vuletić V. Optomechanical cavity cooling of an atomic ensemble. PHYSICAL REVIEW LETTERS 2011; 107:143005. [PMID: 22107191 DOI: 10.1103/physrevlett.107.143005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Indexed: 05/31/2023]
Abstract
We demonstrate cavity sideband cooling of a single collective motional mode of an atomic ensemble down to a mean phonon occupation number ⟨n⟩(min)=2.0(-0.3)(+0.9). Both ⟨n⟩(min) and the observed cooling rate are in good agreement with an optomechanical model. The cooling rate constant is proportional to the total photon scattering rate by the ensemble, demonstrating the cooperative character of the light-emission-induced cooling process. We deduce fundamental limits to cavity cooling either the collective mode or, sympathetically, the single-atom degrees of freedom.
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Affiliation(s)
- Monika H Schleier-Smith
- Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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17
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Lien CY, Williams SR, Odom B. Optical pulse-shaping for internal cooling of molecules. Phys Chem Chem Phys 2011; 13:18825-9. [DOI: 10.1039/c1cp21201j] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Venn P, Ulbricht H. Coherent control of the motion of complex molecules and the coupling to internal state dynamics. Faraday Discuss 2011; 153:237-46; discussion 293-319. [DOI: 10.1039/c1fd00066g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Viteau M, Chotia A, Sofikitis D, Allegrini M, Bouloufa N, Dulieu O, Comparat D, Pillet P. Broadband lasers to detect and cool the vibration of cold molecules. Faraday Discuss 2010; 142:257-70; discussion 319-34. [PMID: 20151547 DOI: 10.1039/b819697d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By using broadband lasers, we demonstrate the possibilities for control of cold molecules formed via photoassociation. Firstly, we present a detection REMPI scheme (M. Viteau et al., Phys. Rev. A, 2009, 79, 021402) to systematically investigate the mechanisms of formation of ultracold Cs2 molecules in deeply bound levels of their electronic ground state X1sigma(g)+. This broadband detection scheme could be generalized to other molecular species. Then we report a vibrational cooling technique (M. Viteau et al., Science, 2008, 321, 232) through optical pumping obtained by using a shaped mode locked femtosecond laser. The broadband femtosecond laser excites the molecules electronically, leading to a redistribution of the vibrational population in the ground state via a few absorption-spontaneous emission cycles. By removing the laser frequencies corresponding to the excitation of the v = 0 level, we realize a dark state for the so-shaped femtosecond laser, leading, with the successive laser pulses, to an accumulation of the molecules in the v = 0 level, ie. a laser cooling of the vibration. The simulation of the vibrational laser cooling allows us to characterize the criteria to extend the mechanism to other molecular species (R. V. Krems, Int. Rev. Phys. Chem., 2005, 24, 99). We finally discuss the generalization of the technique to laser cooling of the rotation of the molecule.
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Affiliation(s)
- Matthieu Viteau
- Laboratoire Aimé Cotton, CNRS, Univ Paris-Sud, Bât. 505, 91405 Orsay, France
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20
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Hutson JM, Beyene M, González-Martínez ML. Dramatic reductions in inelastic cross sections for ultracold collisions near Feshbach resonances. PHYSICAL REVIEW LETTERS 2009; 103:163201. [PMID: 19905692 DOI: 10.1103/physrevlett.103.163201] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2009] [Indexed: 05/28/2023]
Abstract
We show that low-energy inelastic cross sections can decrease as well as increase in the vicinity of a zero-energy Feshbach resonance. When an external field is used to tune across such a resonance, the real and imaginary parts of the scattering length show asymmetric oscillations with both peaks and troughs. In favorable circumstances, the inelastic collision rate can be reduced to almost zero. This may be important for efforts to achieve evaporative and sympathetic cooling for molecules.
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Affiliation(s)
- Jeremy M Hutson
- Department of Chemistry, University of Durham, South Road, Durham, DH1 3LE, United Kingdom
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21
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Leibrandt DR, Labaziewicz J, Vuletić V, Chuang IL. Cavity sideband cooling of a single trapped ion. PHYSICAL REVIEW LETTERS 2009; 103:103001. [PMID: 19792300 DOI: 10.1103/physrevlett.103.103001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2009] [Indexed: 05/28/2023]
Abstract
We report a demonstration and quantitative characterization of one-dimensional cavity cooling of a single trapped (88)Sr(+) ion in the resolved-sideband regime. We measure the spectrum of cavity transitions, the rates of cavity heating and cooling, and the steady-state cooling limit. The cavity cooling dynamics and cooling limit of 22.5(3) motional quanta, limited by the moderate coupling between the ion and the cavity, are consistent with a simple model [Phys. Rev. A 64, 033405 (2001)] without any free parameters, validating the rate equation model for cavity cooling.
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Affiliation(s)
- David R Leibrandt
- Department of Physics & Center for Ultracold Atoms Massachusetts Institute of Technology, Cambridge, Massachusetts, 02139, USA.
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22
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Schnell M, Meijer G. Cold Molecules: Preparation, Applications, and Challenges. Angew Chem Int Ed Engl 2009; 48:6010-31. [DOI: 10.1002/anie.200805503] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Schnell M, Meijer G. Kalte Moleküle: Herstellung, Anwendungen und Herausforderungen. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805503] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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25
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Ni KK, Ospelkaus S, Nesbitt DJ, Ye J, Jin DS. A dipolar gas of ultracold molecules. Phys Chem Chem Phys 2009; 11:9626-39. [DOI: 10.1039/b911779b] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Stuhl BK, Sawyer BC, Wang D, Ye J. Magneto-optical trap for polar molecules. PHYSICAL REVIEW LETTERS 2008; 101:243002. [PMID: 19113618 DOI: 10.1103/physrevlett.101.243002] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Indexed: 05/27/2023]
Abstract
We propose a method for laser cooling and trapping a substantial class of polar molecules and, in particular, titanium (II) oxide (TiO). This method uses pulsed electric fields to nonadiabatically remix the ground-state magnetic sublevels of the molecule, allowing one to build a magneto-optical trap based on a quasicycling J' = J'' -1 transition. Monte Carlo simulations of this electrostatically remixed magneto-optical trap demonstrate the feasibility of cooling TiO to a temperature of 10 micrpK and trapping it with a radiation-pumping-limited lifetime on the order of 80 ms.
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Affiliation(s)
- Benjamin K Stuhl
- JILA, National Institute of Standards and Technology, University of Colorado, Boulder, Colorado 80309-0440, USA.
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Viteau M, Chotia A, Allegrini M, Bouloufa N, Dulieu O, Comparat D, Pillet P. Optical Pumping and Vibrational Cooling of Molecules. Science 2008; 321:232-4. [DOI: 10.1126/science.1159496] [Citation(s) in RCA: 231] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Matthieu Viteau
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Amodsen Chotia
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Maria Allegrini
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Nadia Bouloufa
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Olivier Dulieu
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Daniel Comparat
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
| | - Pierre Pillet
- Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay, France
- Consorzio Nazionale Interuniversitario per le Scienze Fisiche della Materia, Dipartimento di Fisica, Università di Pisa, Largo Pontecorvo 3,56127 Pisa, Italy
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