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Kosloff R. Quantum Molecular Devices. ACS PHYSICAL CHEMISTRY AU 2024; 4:226-231. [PMID: 38800727 PMCID: PMC11117685 DOI: 10.1021/acsphyschemau.3c00077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 02/01/2024] [Accepted: 02/07/2024] [Indexed: 05/29/2024]
Abstract
Miniaturization has been the driving force in contemporary technologies. However, two main obstacles limit further progress: additional reduction in size has reached its quantum limit, and lithography has reached its threshold. Future progress requires tackling three challenges: chemical synthesis of a complete device, active cooling for exploiting quantum characteristics, and quantum coherent control for operation. Chemical synthesis replaces the current top-bottom approach to manufacturing with bottom-up synthesis from elementary building blocks. New ultracold synthetic methods should be developed. An additional challenge is the active cooling of molecules, where the bottleneck is entropy removal. Notably, the current solution, namely, diffusion, is too slow. A coherent approach offers a possible solution; specifically, quantum coherent control is the method of choice for manipulating ultracold matter. Finally, the many degrees of freedom of molecules should be an asset that allows the design and implementation of complex tasks such as sensing communication and computing.
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Affiliation(s)
- Ronnie Kosloff
- Institute of Chemistry, Hebrew
University of Jerusalem, Jerusalem 9190401, Israel
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2
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Hu JW, Yu J, Han YC. Multi-path effect in population transfer dynamics of the photoassociation of hot Mg atoms by a femtosecond laser pulse. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139405] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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3
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Hu JW, Han YC. The thermal-average effect on the field-free orientation of the NaI molecule with full-dimensional random-phase wavefunctions. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.139052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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4
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Photon retention in coherently excited nitrogen ions. Sci Bull (Beijing) 2021; 66:1511-1517. [PMID: 36654279 DOI: 10.1016/j.scib.2021.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/23/2021] [Accepted: 03/26/2021] [Indexed: 01/20/2023]
Abstract
Quantum coherence in quantum optics is an essential part of optical information processing and light manipulation. Alkali metal vapors, despite the numerous shortcomings, are traditionally used in quantum optics as a working medium due to convenient near-infrared excitation, strong dipole transitions and long-lived coherence. Here, we proposed and experimentally demonstrated photon retention and subsequent re-emittance with the quantum coherence in a system of coherently excited molecular nitrogen ions (N2+) which are produced using a strong 800 nm femtosecond laser pulse. Such photon retention, facilitated by quantum coherence, keeps releasing directly-unmeasurable coherent photons for tens of picoseconds, but is able to be read out by a time-delayed femtosecond pulse centered at 1580 nm via two-photon resonant absorption, resulting in a strong radiation at 329.3 nm. We reveal a pivotal role of the excited-state population to transmit such extremely weak re-emitted photons in this system. This new finding unveils the nature of the coherent quantum control in N2+ for the potential platform for optical information storage in the remote atmosphere, and facilitates further exploration of fundamental interactions in the quantum optical platform with strong-field ionized molecules..
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5
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Hu JW, Han YC. Investigation of photoassociation with full-dimensional thermal-random-phase wavefunctions. J Chem Phys 2021; 155:064108. [PMID: 34391372 DOI: 10.1063/5.0059543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
By taking the femtosecond two-photon photoassociation (PA) of magnesium atoms as an example, we propose a method to calculate the thermally averaged population, which is transferred from the ground X1Σg + state to the target (1)1Πg state, based on the solution of full-dimensional time-dependent Schrödinger equation. In this method, named as method A, we use thermal-random-phase wavefunctions with the random phases expanded in both the vibrational and rotational degrees of freedom to model the thermal ensemble of the initial eigenstates. This method is compared with the other two methods (B and C) at different temperatures. Method B is also based on thermal-random-phase wavefunctions, except that the random-phase expansion is merely used for the vibrational degree of freedom. Method C is based on the independent propagation of every initial eigenstate, instead of the thermal-random-phase wavefunctions. Taking the (1)1Πg state as the target state, it is found that although these three methods can present the same population on the (1)1Πg state, the computation efficiency of method A increases dramatically with the increase in temperature. With this efficient method A, we find that the PA process at 1000 K can also induce rotational coherence, i.e., the molecular field-free alignment in the excited electronic states.
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Affiliation(s)
- Jin-Wei Hu
- Department of Physics, Dalian University of Technology, Dalian 116024, China
| | - Yong-Chang Han
- Department of Physics, Dalian University of Technology, Dalian 116024, China
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6
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Yuwono SH, Magoulas I, Piecuch P. Quantum computation solves a half-century-old enigma: Elusive vibrational states of magnesium dimer found. SCIENCE ADVANCES 2020; 6:eaay4058. [PMID: 32284970 PMCID: PMC7124942 DOI: 10.1126/sciadv.aay4058] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Accepted: 01/09/2020] [Indexed: 05/29/2023]
Abstract
The high-lying vibrational states of the magnesium dimer (Mg2), which has been recognized as an important system in studies of ultracold and collisional phenomena, have eluded experimental characterization for half a century. Until now, only the first 14 vibrational states of Mg2 have been experimentally resolved, although it has been suggested that the ground-state potential may support five additional levels. Here, we present highly accurate ab initio potential energy curves based on state-of-the-art coupled-cluster and full configuration interaction computations for the ground and excited electronic states involved in the experimental investigations of Mg2. Our ground-state potential unambiguously confirms the existence of 19 vibrational levels, with ~1 cm-1 root mean square deviation between the calculated rovibrational term values and the available experimental and experimentally derived data. Our computations reproduce the latest laser-induced fluorescence spectrum and provide guidance for the experimental detection of the previously unresolved vibrational levels.
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Affiliation(s)
- Stephen H. Yuwono
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Ilias Magoulas
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
| | - Piotr Piecuch
- Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824, USA
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7
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Heger MW, Koch CP, Reich DM. Optimized sampling of mixed-state observables. Phys Rev E 2019; 100:052105. [PMID: 31869928 DOI: 10.1103/physreve.100.052105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Indexed: 11/07/2022]
Abstract
Quantum dynamical simulations of statistical ensembles pose a significant computational challenge due to the fact that mixed states need to be represented. If the underlying dynamics is fully unitary, for example, in ultrafast coherent control at finite temperatures, then one approach to approximate time-dependent observables is to sample the density operator by solving the Schrödinger equation for a set of wave functions with randomized phases. We show that, on average, random-phase wave functions perform well for ensembles with high mixedness, whereas at higher purities a deterministic sampling of the energetically lowest-lying eigenstates becomes superior. We prove that minimization of the worst-case error for computing arbitrary observables is uniquely attained by eigenstate-based sampling. We show that this error can be used to form a qualitative estimate of the set of ensemble purities for which the sampling performance of the eigenstate-based approach is superior to random-phase wave functions. Furthermore, we present refinements to both schemes which remove redundant information from the sampling procedure to accelerate their convergence. Finally, we point out how the structure of low-rank observables can be exploited to further improve eigenstate-based sampling schemes.
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Affiliation(s)
- Marec W Heger
- Theoretische Physik, Universität Kassel, 34132 Kassel, Germany
| | | | - Daniel M Reich
- Theoretische Physik, Universität Kassel, 34132 Kassel, Germany
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8
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Yuwono SH, Magoulas I, Shen J, Piecuch P. Application of the coupled-cluster CC(P;Q) approaches to the magnesium dimer. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1564847] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Stephen H. Yuwono
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | - Ilias Magoulas
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | - Jun Shen
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
| | - Piotr Piecuch
- Department of Chemistry, Michigan State University, East Lansing, MI, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
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9
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Zhao H, Yu CS. Coherence measure in terms of the Tsallis relative α entropy. Sci Rep 2018; 8:299. [PMID: 29321521 PMCID: PMC5762766 DOI: 10.1038/s41598-017-18692-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Accepted: 12/15/2017] [Indexed: 11/21/2022] Open
Abstract
Coherence is the most fundamental quantum feature of the nonclassical systems. The understanding of coherence within the resource theory has been attracting increasing interest among which the quantification of coherence is an essential ingredient. A satisfactory measure should meet certain standard criteria. It seems that the most crucial criterion should be the strong monotonicity, that is, average coherence doesn’t increase under the (sub-selective) incoherent operations. Recently, the Tsallis relative α entropy has been tried to quantify the coherence. But it was shown to violate the strong monotonicity, even though it can unambiguously distinguish the coherent and the incoherent states with the monotonicity. Here we establish a family of coherence quantifiers which are closely related to the Tsallis relative α entropy. It proves that this family of quantifiers satisfy all the standard criteria and particularly cover several typical coherence measures.
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Affiliation(s)
- Haiqing Zhao
- College of Science, Dalian jiaotong University, Dalian, 116028, China
| | - Chang-Shui Yu
- School of Physics, Dalian University of Technology, Dalian, 116024, China.
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10
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Csehi A, Halász GJ, Vibók Á. The role of quadratic frequency chirps in the photodissociation dynamics of D2+. Chem Phys 2017. [DOI: 10.1016/j.chemphys.2016.09.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Shao Q, Deng L, Xing X, Gou D, Kuang X, Li H. Ground State Properties of the Polar Alkali-Metal–Ytterbium and Alkaline-Earth-Metal–Ytterbium Molecules: A Comparative Study. J Phys Chem A 2017; 121:2187-2193. [DOI: 10.1021/acs.jpca.6b11741] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qinqin Shao
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Lijuan Deng
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Xiaodong Xing
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Dezhi Gou
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Xiaoyu Kuang
- Institute
of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
| | - Hui Li
- Laboratoire
Aimé Cotton, CNRS, Université Paris-Sud, ENS Cachan, Université Paris-Saclay, 91405 Orsay, France
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12
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Tucholska AM, Lesiuk M, Moszynski R. Transition moments between excited electronic states from the Hermitian formulation of the coupled cluster quadratic response function. J Chem Phys 2017; 146:034108. [PMID: 28109234 DOI: 10.1063/1.4973978] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
We introduce a new method for the computation of the transition moments between the excited electronic states based on the expectation value formalism of the coupled cluster theory [B. Jeziorski and R. Moszynski, Int. J. Quantum Chem. 48, 161 (1993)]. The working expressions of the new method solely employ the coupled cluster operator T and an auxiliary operator S that is expressed as a finite commutator expansion in terms of T and T†. In the approximation adopted in the present paper, the cluster expansion is limited to single, double, and linear triple excitations. The computed dipole transition probabilities for the singlet-singlet and triplet-triplet transitions in alkali earth atoms agree well with the available theoretical and experimental data. In contrast to the existing coupled cluster response theory, the matrix elements obtained by using our approach satisfy the Hermitian symmetry even if the excitations in the cluster operator are truncated, but the operator S is exact. The Hermitian symmetry is slightly broken if the commutator series for the operator S are truncated. As a part of the numerical evidence for the new method, we report calculations of the transition moments between the excited triplet states which have not yet been reported in the literature within the coupled cluster theory. Slater-type basis sets constructed according to the correlation-consistency principle are used in our calculations.
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Affiliation(s)
| | - Michał Lesiuk
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Robert Moszynski
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
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13
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Goetz RE, Isaev TA, Nikoobakht B, Berger R, Koch CP. Theoretical description of circular dichroism in photoelectron angular distributions of randomly oriented chiral molecules after multi-photon photoionization. J Chem Phys 2017; 146:024306. [DOI: 10.1063/1.4973456] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
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14
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Csehi A, Halász GJ, Cederbaum LS, Vibók Á. Towards controlling the dissociation probability by light-induced conical intersections. Faraday Discuss 2016; 194:479-493. [DOI: 10.1039/c6fd00139d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Light-induced conical intersections (LICIs) can be formed both by standing or by running laser waves. The position of a LICI is determined by the laser frequency while the laser intensity controls the strength of the nonadiabatic coupling. Recently, it was shown within the LICI framework that linearly chirped laser pulses have an impact on the dissociation dynamics of the D2+molecule (J. Chem. Phys.,143, 014305, (2015);J. Chem. Phys.,144, 074309, (2016)). In this work we exploit this finding and perform calculations using chirped laser pulses in which the time dependence of the laser frequency is designed so as to force the LICI to move together with the field-free vibrational wave packet as much as possible. Since nonadiabaticity is strongest in the vicinity of the conical intersection, this is the first step towards controlling the dissociation processviathe LICI. Our showcase example is again the D2+molecular ion. To demonstrate the impact of the LICIs on the dynamical properties of diatomics, the total dissociation probabilities and the population of the different vibrational levels after the dissociation process are studied and discussed.
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Affiliation(s)
- András Csehi
- Department of Theoretical Physics
- University of Debrecen
- H-4010 Debrecen
- Hungary
| | - Gábor J. Halász
- Department of Information Technology
- University of Debrecen
- H-4010 Debrecen
- Hungary
| | - Lorenz S. Cederbaum
- Theoretische Chemie
- Physikalish-Chemisches Institut
- Universität Heidelberg
- H-69120 Heidelberg
- Germany
| | - Ágnes Vibók
- Department of Theoretical Physics
- University of Debrecen
- H-4010 Debrecen
- Hungary
- ELI-ALPS
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15
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Wang BB, Han YC, Cong SL. Molecular alignment effect on the photoassociation process via a pump-dump scheme. J Chem Phys 2015; 143:094303. [DOI: 10.1063/1.4929388] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Bin-Bin Wang
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
| | - Yong-Chang Han
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
| | - Shu-Lin Cong
- School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China
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16
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Isotope effects on the formation of the lowest rovibrational level of NaH molecule via pump–dump photoassociation. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1680-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Amaran S, Kosloff R, Tomza M, Skomorowski W, Pawłowski F, Moszynski R, Rybak L, Levin L, Amitay Z, Berglund JM, Reich DM, Koch CP. Femtosecond two-photon photoassociation of hot magnesium atoms: A quantum dynamical study using thermal random phase wavefunctions. J Chem Phys 2013; 139:164124. [DOI: 10.1063/1.4826350] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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18
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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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19
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Tomza M, Skomorowski W, Musiał M, González-Férez R, Koch CP, Moszynski R. Interatomic potentials, electric properties and spectroscopy of the ground and excited states of the Rb2 molecule: ab initio calculations and effect of a non-resonant field*. Mol Phys 2013. [DOI: 10.1080/00268976.2013.793835] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Michał Tomza
- a Faculty of Chemistry , University of Warsaw , Warsaw , Poland
- b Theoretische Physik , Universität Kassel , Kassel , Germany
| | | | - Monika Musiał
- c Institute of Chemistry , University of Silesia , Katowice , Poland
| | - Rosario González-Férez
- d Instituto Carlos I de Física Teórica y Computacional and Departamento de Física Atómica, Molecular y Nuclear , Universidad de Granada , Granada , Spain
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20
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Skomorowski W, Pawłowski F, Koch CP, Moszynski R. Rovibrational dynamics of the strontium molecule in the AΣu+1, c3Πu, and aΣu+3 manifold from state-of-the-art ab initio calculations. J Chem Phys 2012; 136:194306. [DOI: 10.1063/1.4713939] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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21
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Affiliation(s)
- Christiane P. Koch
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Strasse 40,
34132 Kassel, Germany
| | - Moshe Shapiro
- Department
of Chemistry, University of British Columbia, Vancouver, Canada V6T
1Z1, and Department of Chemical Physics, The Weizmann Institute, Rehovot, Israel 76100
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