1
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Formation rate of RbCs molecules via electro-association. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2019.110651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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2
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Skomorowski W, Shagam Y, Narevicius E, Koch CP. Photoassociation Spectroscopy in Penning Ionization Reactions at Sub-Kelvin Temperatures. J Phys Chem A 2016; 120:3309-15. [DOI: 10.1021/acs.jpca.5b12586] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wojciech Skomorowski
- Theoretische
Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
| | - Yuval Shagam
- Department
of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Edvardas Narevicius
- Department
of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Christiane P. Koch
- Theoretische
Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany
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3
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Taie S, Watanabe S, Ichinose T, Takahashi Y. Feshbach-Resonance-Enhanced Coherent Atom-Molecule Conversion with Ultranarrow Photoassociation Resonance. PHYSICAL REVIEW LETTERS 2016; 116:043202. [PMID: 26871328 DOI: 10.1103/physrevlett.116.043202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Indexed: 06/05/2023]
Abstract
We reveal the existence of high-density Feshbach resonances in the collision between the ground and metastable states of ^{171}Yb and coherently produce the associated Feshbach molecules by photoassociation. The extremely small transition rate is overcome by the enhanced Franck-Condon factor of the weakly bound Feshbach molecule, allowing us to observe Rabi oscillations with long decay time between an atom pair and a molecule in an optical lattice. We also perform the precision measurement of the binding energies, which characterizes the observed resonances. The ultranarrow photoassociation will be a basis for practical implementation of optical Feshbach resonances.
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Affiliation(s)
- Shintaro Taie
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Shunsuke Watanabe
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Tomohiro Ichinose
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
| | - Yoshiro Takahashi
- Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
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4
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Ma J, Li Y, Wu J, Xiao L, Jia S. Laser intensity induced transparency in atom-molecular transition process. CHINESE SCIENCE BULLETIN-CHINESE 2014. [DOI: 10.1007/s11434-014-0448-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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5
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Julienne PS. Ultracold molecules from ultracold atoms: a case study with the KRb molecule. Faraday Discuss 2009; 142:361-88; discussion 429-61. [DOI: 10.1039/b820917k] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Mackie M, Fenty M, Savage D, Kesselman J. Cross-molecular coupling in combined photoassociation and Feshbach resonances. PHYSICAL REVIEW LETTERS 2008; 101:040401. [PMID: 18764309 DOI: 10.1103/physrevlett.101.040401] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2008] [Indexed: 05/26/2023]
Abstract
We model combined photoassociation and Feshbach resonances in a Bose-Einstein condensate. When the magnetic field is far-off resonance, cross coupling between the two target molecules--enabled by the shared dissociation continuum--leads to an anomalous dispersive shift in the position of laser resonance, as well as unprecedented elimination and enhancement of resonant photoassociation via quantum interference. For off-resonant lasers, a dispersive shift and quantum interference appear similarly in resonant three-body Feshbach losses, except that the Feshbach node is tunable with intensity.
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Affiliation(s)
- Matt Mackie
- Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA
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7
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Moal S, Portier M, Kim J, Dugué J, Rapol UD, Leduc M, Cohen-Tannoudji C. Accurate determination of the scattering length of metastable helium atoms using dark resonances between atoms and exotic molecules. PHYSICAL REVIEW LETTERS 2006; 96:023203. [PMID: 16486572 DOI: 10.1103/physrevlett.96.023203] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2005] [Indexed: 05/06/2023]
Abstract
We present a new measurement of the s-wave scattering length a of spin-polarized helium atoms in the 2(3)S1 metastable state. Using two-photon photoassociation spectroscopy and dark resonances, we measure the energy E(nu)=14= -91.35+/- 0.06 MHz of the least-bound state nu = 14 in the interaction potential of the two atoms. We deduce a value of a=7.512+/-0.005 nm, which is at least 100 times more precise than the best previous determinations and is in disagreement with some of them. This experiment also demonstrates the possibility to create exotic molecules binding two metastable atoms with a lifetime of the order of 1 micros.
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Affiliation(s)
- S Moal
- Ecole Normale Supérieure and Collège de France, Laboratoire Kastler Brossel, 24 rue Lhomond, 75231 Paris Cedex 05, France
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8
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Mickelson PG, Martinez YN, Saenz AD, Nagel SB, Chen YC, Killian TC, Pellegrini P, Côté R. Spectroscopic determination of the s-wave scattering lengths of 86Sr and 88Sr. PHYSICAL REVIEW LETTERS 2005; 95:223002. [PMID: 16384214 DOI: 10.1103/physrevlett.95.223002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Indexed: 05/05/2023]
Abstract
We report the use of photoassociative spectroscopy to determine the ground-state s-wave scattering lengths for the main bosonic isotopes of strontium, 86Sr and 88Sr. Photoassociative transitions are driven with a laser red detuned by up to 1400 GHz from the 1S0-1P1 atomic resonance at 461 nm. A minimum in the transition amplitude for 86Sr at -494 +/- 5 GHz allows us to determine the scattering lengths 610a0 < a86 < 2300a0 for 86Sr and a much smaller value of -1a0 < a88 < 13a0 for 88Sr.
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Affiliation(s)
- P G Mickelson
- Department of Physics and Astronomy, Rice University, Houston, Texas 77251, USA
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9
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Prodan ID, Pichler M, Junker M, Hulet RG, Bohn JL. Intensity dependence of photoassociation in a quantum degenerate atomic gas. PHYSICAL REVIEW LETTERS 2003; 91:080402. [PMID: 14525225 DOI: 10.1103/physrevlett.91.080402] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2002] [Indexed: 05/24/2023]
Abstract
We have measured the intensity dependent rate and frequency shift of a photoassociation transition in a quantum degenerate gas of 7Li. The rate increases linearly with photoassociation laser intensity for low intensities, whereas saturation is observed at higher intensities. The measured rates and shifts agree reasonably well with theory within the estimated systematic uncertainties. Several theoretically predicted saturation mechanisms are discussed, but a theory in which saturation arises because of quantum mechanical unitarity agrees well with the data.
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Affiliation(s)
- Ionut D Prodan
- Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston, Texas 77251, USA
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10
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de Araujo LEE, Weinstein JD, Gensemer SD, Fatemi FK, Jones KM, Lett PD, Tiesinga E. Two-color photoassociation spectroscopy of the lowest triplet potential of Na2. J Chem Phys 2003. [DOI: 10.1063/1.1585028] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Regal CA, Ticknor C, Bohn JL, Jin DS. Tuning p-wave interactions in an ultracold Fermi gas of atoms. PHYSICAL REVIEW LETTERS 2003; 90:053201. [PMID: 12633351 DOI: 10.1103/physrevlett.90.053201] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2002] [Indexed: 05/24/2023]
Abstract
We have measured a p-wave Feshbach resonance in a single-component, ultracold Fermi gas of 40K atoms. We have used this resonance to enhance the normally suppressed p-wave collision cross section to values larger than the background s-wave cross section between 40K atoms in different spin states. In addition to the modification of two-body elastic processes, the resonance dramatically enhances three-body inelastic collisional loss.
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Affiliation(s)
- C A Regal
- JILA, National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA
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12
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Bergeman T, Julienne PS, Williams CJ, Tiesinga E, Manaa MR, Wang H, Gould PL, Stwalley WC. Predissociations in 0u+ and 1g states of K2. J Chem Phys 2002. [DOI: 10.1063/1.1508375] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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13
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Burnett K, Julienne PS, Lett PD, Tiesinga E, Williams CJ. Quantum encounters of the cold kind. Nature 2002; 416:225-32. [PMID: 11894106 DOI: 10.1038/416225a] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Since the introduction of laser-cooling techniques for neutral atoms in the early 1980s, the study of collisional interactions between atoms and molecules has been extended to the regime of ultracold temperatures. With nanokelvin temperatures now attainable, our ability to probe the interactions, both experimentally and theoretically, has also progressed. Understanding of the subtle and often highly quantum-mechanical effects that are manifest at such low energies has advanced to the point where new precision measurements are matched by highly accurate theoretical calculations. Low-energy phenomena such as Bose-Einstein condensation and the photoassociation of atoms into bound molecules are now accurately described with no free parameters.
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Affiliation(s)
- Keith Burnett
- University of Oxford, Department of Physics, Clarendon Laboratory, Parks Road, Oxford, OX1 3PU, UK
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14
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Abstract
This review focuses on the study of the dynamics of isolated molecules and their control using coherent nonlinear spectroscopic methods. Emphasis is placed on topics such as bound-to-free excitation and the study of concerted elimination reactions, free-to-bound excitation and the study of bimolecular reactions, and bound-to-bound excitation and the study of intramolecular rovibrational dynamics and coherence relaxation. For each case the detailed time-resolved information reveals possible strategies to control the outcome. Experimental results are shown for each of the reactions discussed. The methods discussed include pump-probe and four-wave mixing processes such as transient grating and photon echo spectroscopy. Off-resonance transient-grating experiments are shown to be ideal for the study of ground state dynamics, molecular structure, and the molecular response to strong field excitation.
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Affiliation(s)
- M Dantus
- Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824, USA.
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15
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Zinner G, Binnewies T, Riehle F, Tiemann E. Photoassociation of cold Ca atoms. PHYSICAL REVIEW LETTERS 2000; 85:2292-2295. [PMID: 10977994 DOI: 10.1103/physrevlett.85.2292] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2000] [Indexed: 05/23/2023]
Abstract
We present the first measurement of a photoassociative spectrum of an alkaline earth element near the dissociation limit. The observed spectrum of Ca2 formed from cold atoms shows the regular vibrational series with the characteristic spacing of the 1/R3 asymptotic potential. The interpretation is in principle simplified compared to previous measurements on alkali metals by the nondegenerate ground state and the missing hyperfine structure of 40Ca. As an example, we derive the natural decay rate of the excited atomic 4p 1P1 state from the positions of the observed vibrational and rotational resonances with reduced uncertainty compared to previous measurements.
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Affiliation(s)
- G Zinner
- Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
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16
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Stwalley WC, Wang H. Photoassociation of Ultracold Atoms: A New Spectroscopic Technique. JOURNAL OF MOLECULAR SPECTROSCOPY 1999; 195:194-228. [PMID: 10329265 DOI: 10.1006/jmsp.1999.7838] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The new spectroscopic technique of photoassociation of ultracold atoms is reviewed, with an emphasis on connecting this area to traditional bound-state molecular spectroscopy. In particular, in contrast to photoassociative spectra at thermal energies, which are broad and of low information content, photoassociative spectra of ultracold atoms are high resolution, permitting observation of small vibrational and rotational spacings of long-range molecular levels near dissociation (typically with outer classical turning points >20 Å). The types of detection and theoretical analysis employed are illustrated, primarily using the example of 39K2. Future directions and applications of this field (e.g., to ultracold molecular formation) are also discussed. Copyright 1999 Academic Press.
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Affiliation(s)
- WC Stwalley
- Department of Physics, University of Connecticut, 2152 Hillside Road, Storrs, Connecticut, 06269-3046
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17
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Marvet U, Zhang Q, Dantus M. Femtosecond Dynamics of Unimolecular and Unrestricted Bimolecular Reactions. J Phys Chem A 1998. [DOI: 10.1021/jp9732975] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Una Marvet
- Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824-1322
| | - Qingguo Zhang
- Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824-1322
| | - Marcos Dantus
- Department of Chemistry and Center for Fundamental Materials Research, Michigan State University, East Lansing, Michigan 48824-1322
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18
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Wang H, Gould PL, Stwalley WC. Long-range interaction of the 39K(4s)+39K(4p) asymptote by photoassociative spectroscopy. I. The 0g− pure long-range state and the long-range potential constants. J Chem Phys 1997. [DOI: 10.1063/1.473804] [Citation(s) in RCA: 76] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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19
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Gross P, Dantus M. Femtosecond photoassociation: Coherence and implications for control in bimolecular reactions. J Chem Phys 1997. [DOI: 10.1063/1.473811] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Boesten HM, Tsai CC, Verhaar BJ, Heinzen DJ. Observation of a Shape Resonance in Cold-Atom Scattering by Pulsed Photoassociation. PHYSICAL REVIEW LETTERS 1996; 77:5194-5197. [PMID: 10062739 DOI: 10.1103/physrevlett.77.5194] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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21
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Bohn JL, Julienne PS. Semianalytic treatment of two-color photoassociation spectroscopy and control of cold atoms. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 54:R4637-R4640. [PMID: 9914136 DOI: 10.1103/physreva.54.r4637] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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22
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Burnett K, Julienne PS, Suominen K. Laser-Driven Collisions between Atoms in a Bose-Einstein Condensed Gas. PHYSICAL REVIEW LETTERS 1996; 77:1416-1419. [PMID: 10063073 DOI: 10.1103/physrevlett.77.1416] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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23
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Jones KM, Maleki S, Bize S, Lett PD, Williams CJ, Richling H, Knöckel H, Tiemann E, Wang H, Gould PL, Stwalley WC. Direct measurement of the ground-state dissociation energy of Na2. PHYSICAL REVIEW A 1996; 54:R1006-R1009. [PMID: 9913658 DOI: 10.1103/physreva.54.r1006] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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24
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Rudolph H, Urbain X. Vibrational branching ratios for single-photon ionization of Na2. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:4111-4119. [PMID: 9913375 DOI: 10.1103/physreva.53.4111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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25
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Abraham ER, McAlexander WI, Gerton JM, Hulet RG, Côté R, Dalgarno A. Singlet s-wave scattering lengths of 6Li and 7Li. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:R3713-R3715. [PMID: 9913449 DOI: 10.1103/physreva.53.r3713] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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26
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Abraham ER, McAlexander WI, Stoof HT, Hulet RG. Hyperfine structure in photoassociative spectra of 6Li2 and 7Li2. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:3092-3097. [PMID: 9913247 DOI: 10.1103/physreva.53.3092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Côté R, Heller EJ, Dalgarno A. Quantum suppression of cold atom collisions. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1996; 53:234-241. [PMID: 9912879 DOI: 10.1103/physreva.53.234] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Abraham ERI, Ritchie NWM, McAlexander WI, Hulet RG. Photoassociative spectroscopy of long‐range states of ultracold 6Li2 and 7Li2. J Chem Phys 1995. [DOI: 10.1063/1.470296] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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29
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Solts R, Ben-Reuven A, Julienne PS. Optical collisions in ultracold atom traps: Two-photon distorted-wave theory. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 52:4029-4042. [PMID: 9912717 DOI: 10.1103/physreva.52.4029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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30
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Dulieu O, Julienne PS. Coupled channel bound states calculations for alkali dimers using the Fourier grid method. J Chem Phys 1995. [DOI: 10.1063/1.469622] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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31
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Gardner JR, Cline RA, Miller JD, Heinzen DJ, Boesten HM, Verhaar BJ. Collisions of doubly spin-polarized, ultracold 85Rb atoms. PHYSICAL REVIEW LETTERS 1995; 74:3764-3767. [PMID: 10058291 DOI: 10.1103/physrevlett.74.3764] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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32
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McAlexander WI, Abraham ER, Ritchie NW, Williams CJ, Stoof HT, Hulet RG. Precise atomic radiative lifetime via photoassociative spectroscopy of ultracold lithium. PHYSICAL REVIEW. A, ATOMIC, MOLECULAR, AND OPTICAL PHYSICS 1995; 51:R871-R874. [PMID: 9911771 DOI: 10.1103/physreva.51.r871] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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