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Jäger M, Denschlag JH. Precise Photoexcitation Measurement of Tan's Contact in the Entire BCS-BEC Crossover. PHYSICAL REVIEW LETTERS 2024; 132:263401. [PMID: 38996286 DOI: 10.1103/physrevlett.132.263401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 05/20/2024] [Indexed: 07/14/2024]
Abstract
We study two-body correlations in a spin-balanced ultracold harmonically trapped Fermi gas of ^{6}Li atoms in the crossover from the Bardeen-Cooper-Schrieffer (BCS) to the Bose-Einstein-Condensate (BEC) regime. For this, we precisely measure Tan's contact using a novel method based on photoexcitation of atomic pairs, which was recently proposed by Wang et al. [Photoexcitation measurement of Tan's contact for a strongly interacting Fermi gas, Phys. Rev. A 104, 063309 (2021).PLRAAN2469-992610.1103/PhysRevA.104.063309]. We map out the contact in the entire phase diagram of the BCS-BEC crossover for various temperatures and interaction strengths, probing regions in phase space that have not been investigated yet. Our measurements reach an uncertainty of ≈2% at the lowest temperatures and thus represent a precise quantitative benchmark. By comparison to our data, we localize the regions in phase space where theoretical predictions and interpolations give valid results. In regions where the contact is already well known we find excellent agreement with our measurements. Thus, our results demonstrate that photoinduced loss is a precise probe to measure quantum correlations in a strongly interacting Fermi gas.
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Affiliation(s)
- Manuel Jäger
- Institut für Quantenmaterie and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm, Albert-Einstein-Allee 45, 89081 Ulm, Germany
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2
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On Atomic Lifetimes and Environmental Density. ATOMS 2022. [DOI: 10.3390/atoms10040114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Atomic lifetime measurements span a wide range, from attoseconds to years. The frontier of exploratory lifetime measurements, presently, is in the long part of the above time range, with an eye on astrophysical problems. In a combination of review paper, tutorial, and Editorial, the physical environments and experiments are discussed, in which the results of such lifetime measurements matter. Although accurate lifetime measurement results are important for our understanding of atomic structure and dynamics, and for the diagnostics of various plasma environments, the order of magnitude is often precise enough to see why time resolution may be of interest in an experiment, from laser-produced plasmas of high densities to planetary nebulae of very low densities.
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3
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Atomic Lifetime Data and Databases. ATOMS 2022. [DOI: 10.3390/atoms10020046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Atomic-level lifetimes span a wide range, from attoseconds to years, relating to transition energy, multipole order, atomic core charge, relativistic effects, perturbation of atomic symmetries by external fields, and so on. Some parameters permit the application of simple scaling rules, others are sensitive to the environment. Which results deserve to be tabulated or stored in atomic databases? Which results require high accuracy to give insight into details of the atomic structure? Which data may be useful for the interpretation of plasma experiments or astrophysical observations without any particularly demanding accuracy threshold? Should computation on demand replace pre-fabricated atomic databases?
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Siddiq R, Hameed MN, Zaheer MH, Khan MB, Uddin Z. Rydberg energies and transition probabilities of Li I for np–ms (m ≤ 5) transitions. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2022; 11:42. [PMID: 35372590 PMCID: PMC8962285 DOI: 10.1186/s43088-022-00224-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Accepted: 03/08/2022] [Indexed: 11/26/2022] Open
Abstract
Background Mathematical modeling provides grounds for understanding scientific systems theoretically. It serves as a guide for experimentalists in determining directions of investigation. Recently, the Covid-19 pandemic has caused disturbances in almost every walk of life. Scientists have played their role and have continued research on the effects of the pandemic. Various mathematical models have been used in different branches of science (Djilali et al. in Phys Scr 96 12 124016, 2021; Math Biosci Eng 18(6):8245–8256, 2021; Zeb et al. in Alex Eng J 61(7):5649–5665). Well-established mathematical models give results close to those obtained by experiments. The Weakest Bound Electron Potential Model is one such model, which explains hydrogen-like atoms and ions. This model has been used extensively for hydrogen-like atoms and ions to calculate energies of Rydberg levels and ionization energies. This model has been used extensively for hydrogen-like atoms and ions to calculate energies of Rydberg levels and ionization energies. Results This paper presents the energies of the Rydberg series, 2s2ns, and 2s2np of Li I, calculated using WBEPM. The energies are used to calculate transition probabilities from np to 2s, 3s, 4s, and 5s levels. The transition probabilities are compared with corresponding values in published data where available. The agreement with known values is good; most of the transition probabilities calculated in this work are new. A computer program was developed to find the value of the dipole matrix element. The calculations were further verified by calculating the lifetimes of some low-lying levels. Conclusions Four series of Li I have been studied, and energies of the Rydberg levels in the series were calculated. The energies then are used to calculate transition probabilities from np to ms transitions, where m = 2, 3, 4, & 5 and n = 1–15. The results are compared where available. An excellent agreement with previously published data shows the reliability of calculations. Most of the transition probabilities are new.
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Hulet RG, Nguyen JHV, Senaratne R. Methods for preparing quantum gases of lithium. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:011101. [PMID: 32012609 DOI: 10.1063/1.5131023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 12/24/2019] [Indexed: 06/10/2023]
Abstract
Lithium is an important element in atomic quantum gas experiments because its interactions are highly tunable due to broad Feshbach resonances and zero-crossings and because it has two stable isotopes: 6Li, a fermion, and 7Li, a boson. Although lithium has special value for these reasons, it also presents experimental challenges. In this article, we review some of the methods that have been developed or adapted to confront these challenges, including beam and vapor sources, Zeeman slowers, sub-Doppler laser cooling, laser sources at 671 nm, and all-optical methods for trapping and cooling. Additionally, we provide spectral diagrams of both 6Li and 7Li and present plots of Feshbach resonances for both isotopes.
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Affiliation(s)
- Randall G Hulet
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Jason H V Nguyen
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Ruwan Senaratne
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
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6
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Oxley P, Wihbey J. Precision atomic beam density characterization by diode laser absorption spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:093103. [PMID: 27782538 DOI: 10.1063/1.4962025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We provide experimental and theoretical details of a simple technique to determine absolute line-of-sight integrated atomic beam densities based on resonant laser absorption. In our experiments, a thermal lithium beam is chopped on and off while the frequency of a laser crossing the beam at right angles is scanned slowly across the resonance transition. A lock-in amplifier detects the laser absorption signal at the chop frequency from which the atomic density is determined. The accuracy of our experimental method is confirmed using the related technique of wavelength modulation spectroscopy. For beams which absorb of order 1% of the incident laser light, our measurements allow the beam density to be determined to an accuracy better than 5% and with a precision of 3% on a time scale of order 1 s. Fractional absorptions of order 10-5 are detectable on a one-minute time scale when we employ a double laser beam technique which limits laser intensity noise. For a lithium beam with a thickness of 9 mm, we have measured atomic densities as low as 5 × 104 atoms cm-3. The simplicity of our technique and the details we provide should allow our method to be easily implemented in most atomic or molecular beam apparatuses.
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Affiliation(s)
- Paul Oxley
- Physics Department, The College of the Holy Cross, Worcester, Massachusetts 01610, USA
| | - Joseph Wihbey
- Physics Department, The College of the Holy Cross, Worcester, Massachusetts 01610, USA
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8
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Cetina M, Jag M, Lous RS, Walraven JTM, Grimm R, Christensen RS, Bruun GM. Decoherence of Impurities in a Fermi Sea of Ultracold Atoms. PHYSICAL REVIEW LETTERS 2015; 115:135302. [PMID: 26451562 DOI: 10.1103/physrevlett.115.135302] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Indexed: 06/05/2023]
Abstract
We investigate the decoherence of ^{40}K impurities interacting with a three-dimensional Fermi sea of ^{6}Li across an interspecies Feshbach resonance. The decoherence is measured as a function of the interaction strength and temperature using a spin-echo atom interferometry method. For weak to moderate interaction strengths, we interpret our measurements in terms of scattering of K quasiparticles by the Fermi sea and find very good agreement with a Fermi liquid calculation. For strong interactions, we observe significant enhancement of the decoherence rate, which is largely independent of temperature, pointing to behavior that is beyond the scattering of quasiparticles in the Fermi liquid picture.
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Affiliation(s)
- Marko Cetina
- Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
- Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
| | - Michael Jag
- Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
- Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
| | - Rianne S Lous
- Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
- Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
| | - Jook T M Walraven
- Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
- Van der Waals-Zeeman Institute, Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
| | - Rudolf Grimm
- Institut für Quantenoptik und Quanteninformation (IQOQI), Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
- Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
| | - Rasmus S Christensen
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Georg M Bruun
- Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark
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9
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Critical Assessment of Theoretical Calculations of Atomic Structure and Transition Probabilities: An Experimenter’s View. ATOMS 2014. [DOI: 10.3390/atoms2010015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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10
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Wu J, Ma J, Zhang Y, Li Y, Wang L, Zhao Y, Chen G, Xiao L, Jia S. High sensitive trap loss spectroscopic detection of the lowest vibrational levels of ultracold molecules. Phys Chem Chem Phys 2011; 13:18921-5. [PMID: 21952322 DOI: 10.1039/c1cp22314c] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a controllable three-dimensional fluorescence modulation technique for the high sensitive trap loss detection of ultracold molecules. The lowest vibrational levels (v = 0 and 1) of the pure long-range state 0(-)(g) (6S(1/2) + 6P(3/2)) of a cesium molecule are detected directly with high rotational resolution. Our technique proved to be a robust tool for effectively improving the detection sensitivity of trap loss spectroscopy.
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Affiliation(s)
- Jizhou Wu
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, College of Physics and Electronics Engineering, Shanxi University, Taiyuan, 030006, China
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11
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Le Roy RJ, Dattani NS, Coxon JA, Ross AJ, Crozet P, Linton C. Accurate analytic potentials for Li2(X Σ1g+) and Li2(A Σ1u+) from 2 to 90 Å, and the radiative lifetime of Li(2p). J Chem Phys 2009; 131:204309. [DOI: 10.1063/1.3264688] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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12
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Salihoglu O, Qi P, Ahmed EH, Kotochigova S, Magnier S, Lyyra AM. Comparison of Autler–Townes splitting based absolute measurements of the L7i2 A Σ1u+−X Σ1g+ electronic transition dipole moment with ab initio theory. J Chem Phys 2008; 129:174301. [DOI: 10.1063/1.3000416] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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13
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Shen F, Gao J, Senin AA, Zhu CJ, Allen JR, Lu ZH, Xiao Y, Eden JG. Many-body dipole-dipole interactions between excited Rb atoms probed by wave packets and parametric four-wave mixing. PHYSICAL REVIEW LETTERS 2007; 99:143201. [PMID: 17930668 DOI: 10.1103/physrevlett.99.143201] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2005] [Revised: 03/27/2006] [Indexed: 05/25/2023]
Abstract
Dipole-dipole interactions between excited Rb atoms at long range (approximately 300a0-2150a0) have been observed with molecular wave packets and a coherent nonlinear optical process. Fourier analysis of the parametric four-wave mixing (PFWM) signal wave intensity produced in femtosecond pump-probe experiments demonstrates the appearance of sidebands associated with the Rb 7s-5d(5/2) quantum beating frequency of approximately 18.3 THz. Calculations show that the observed sideband splittings and Fourier domain profiles result from multiple atom, dipole-dipole interactions, and ensembles comprising five or fewer Rb (7s, 6p) atoms account for virtually all of the data.
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Affiliation(s)
- F Shen
- Laboratory for Optical Physics and Engineering, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL 61801, USA
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14
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Leduc M, Vigué J. Interplay between Theoretical Quantum Chemistry and Cold Atom Experiments. Theor Chem Acc 2006. [DOI: 10.1007/s00214-006-0105-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Korek M, Moghrabi YA, Allouche AR. Theoretical calculation of the excited states of the KCs molecule including the spin-orbit interaction. J Chem Phys 2006; 124:94309. [PMID: 16526859 DOI: 10.1063/1.2173239] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
For the molecule KCs the potential energy has been calculated for the 72 lowest molecular states Omega. Using an ab initio method the calculation is based on nonempirical pseudopotentials within the range of 5.0a0-34.0a0 of the internuclear distance R. Gaussian basis sets have been used for both atoms and spin-orbit effects have been taken into account through a semiempirical spin-orbit pseudopotential added to the electrostatic Hamiltonian. The spectroscopic constants for 60 states have been calculated by fitting the calculated energy values to a polynomial in terms of the internuclear distance R. The components of the spin-orbit splitting for (1,2,5,6) 3Pi and (1) 3delta have been identified. The comparison of the present results with those available in the literature shows a very good agreement, while the other results, to the best of our knowledge, are given here for the first time.
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Affiliation(s)
- M Korek
- Faculty of Science, Beirut Arab University, P.O. Box 11-5020 Riad El Solh, Beirut 1107 2809, Lebanon.
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16
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Nagel SB, Mickelson PG, Saenz AD, Martinez YN, Chen YC, Killian TC, Pellegrini P, Côté R. Photoassociative spectroscopy at long range in ultracold strontium. PHYSICAL REVIEW LETTERS 2005; 94:083004. [PMID: 15783889 DOI: 10.1103/physrevlett.94.083004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2004] [Revised: 02/18/2005] [Indexed: 05/24/2023]
Abstract
We report photoassociative spectroscopy of 88Sr(2) in a magneto-optical trap operating on the 1S0-->3P1 intercombination line at 689 nm. Photoassociative transitions are driven with a laser red detuned by 600-2400 MHz from the 1S0-->1P1 atomic resonance at 461 nm. Photoassociation takes place at extremely large internuclear separation, and the photoassociative spectrum is strongly affected by relativistic retardation. A fit of the transition frequencies determines the 1P1 atomic lifetime (tau=5.22+/-0.03 ns) and resolves a discrepancy between experiment and recent theoretical calculations.
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Affiliation(s)
- S B Nagel
- Department of Physics and Astronomy and Rice Quantum Institute, Rice University, Houston, TX 77251, USA
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Miffre A, Jacquey M, Büchner M, Trénec G, Vigué J. Parallel temperatures in supersonic beams: ultracooling of light atoms seeded in a heavier carrier gas. J Chem Phys 2005; 122:094308. [PMID: 15836129 DOI: 10.1063/1.1850897] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Supersonic expansion is a very powerful tool to produce an atomic beam with a well defined velocity and, by seeding a test gas in such an expansion, the energy of the test gas can be transferred, at least partially, to the very-low-temperature carrier gas. The case usually studied is the one of a heavy gas seeded in a light carrier gas and, in this case, the parallel temperature of the seeded gas is always larger than the one of the carrier gas. In the present paper, we study the opposite case which has received less attention: when a light gas is seeded in a heavier carrier gas, the parallel temperature can be substantially lower for the seeded gas than for the carrier gas. This effect has been first observed by Campargue and co-workers in 2000, in the case of atomic oxygen seeded in argon. In the present paper, we develop a theoretical analysis of this effect, in the high dilution limit, and we compare our theoretical results to several experimental observations, including a set of measurements we have made on a beam of lithium seeded in argon. The agreement between theory and experiments is good.
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Affiliation(s)
- A Miffre
- Laboratoire Collisions Agrégats Réactivité-IRSAMC, Université Paul Sabatier and CNRS UMR 5589, 118, Route de Narbonne, 31062 Toulouse Cedex, France
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18
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Dulieu O, Pillet P. Playing With a Pair of Ultracold Atoms and Lasers: Towards a Novel Ultracold Photochemistry? Isr J Chem 2004. [DOI: 10.1560/rhhr-c4m6-pffn-8a8j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Comparat D. Improved LeRoy–Bernstein near-dissociation expansion formula, and prospect for photoassociation spectroscopy. J Chem Phys 2004; 120:1318-29. [PMID: 15268257 DOI: 10.1063/1.1626539] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
NDE (Near-dissociation expansion) including LeRoy-Bernstein formulas are improved by taking into account the multipole expansion coefficients and the nonasymptotic part of the potential curve. The theory is tested with the Rydberg-Klein-Rees (RKR) potential curve of the Cs(2)(0(g) (-)6s+6p(3/2)) state. Results indicate that the formula could be used to improve the determination of the asymptotic coefficient (within a 1% accuracy) and to extract relativistic correction from photoassociation spectra of long-range potential curve of diatomic molecules.
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Affiliation(s)
- Daniel Comparat
- Laboratoire Aime Cotton, CNRS II, Bat. 505, Campus d'Orsay, 91405 Orsay cedex, France.
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20
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Amiot C, Dulieu O. The Cs2 ground electronic state by Fourier transform spectroscopy: Dispersion coefficients. J Chem Phys 2002. [DOI: 10.1063/1.1499122] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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21
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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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Magnier S, Aubert-Frécon M, Le Sech C. Model Potential Calculations for Various Electronic Excited States of Li- and Na-. J Phys Chem A 2001. [DOI: 10.1021/jp0111315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Magnier
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
| | - M. Aubert-Frécon
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
| | - C. Le Sech
- Laboratoire de Physique Moléculaire et des Collisions, Institut de Physique, Technopôle 2000, 1 Bd Arago, F-57078 Metz Cedex 3, Laboratoire de Spectrométrie Ionique et Moléculaire, UMR 5579, Campus de la Doua, Bât. Alfred Kastler, 43 Bd du 11 Novembre, F-69622 Villeurbanne, and Laboratoire des Collisions Atomiques et Moléculaires, Unité de Recherches Associée au CNRS n°281, Université de Paris Sud, Bât. 351, F-91405 Orsay Cedex
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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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Gutterres R, Argollo de Menezes M, Fellows C, Dulieu O. Generalized simulated annealing method in the analysis of atom–atom interaction. Chem Phys Lett 1999. [DOI: 10.1016/s0009-2614(98)01243-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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25
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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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