Enantiomer-specific state transfer of chiral molecules in cyclic three-level systems with SU(2) structures

Cheng, Jian-Jian; Chen, Yu-Yuan; Li, Yong; Zhang, L.

doi:10.1103/physreva.107.013718

Cited by 7 publications

(4 citation statements)

References 58 publications

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“…By carefully designing these control fields, it becomes possible to efficiently control the dynamics of the quantum system, ultimately enabling the transfer of population between different states. [6][7][8][9][10][11][12] Several coherent quantum control techniques have been widely used to achieve population transfer, such as stimulated Raman adiabatic passage (STIRAP), [13,14] shortcuts to adiabaticity, [15][16][17] and composite pulses. [18,19] By formulating the population transfer problem within an optimal control framework, quantum optimal control theory offers a powerful tool for finding optimal control strategies that maximize transfer efficiency while including constraints on the control fields.…”

Section: Introductionmentioning

confidence: 99%

Optimal and robust control of population transfer in asymmetric quantum-dot molecules

Guo 郭,

Ma 马,

Shu 束

2024

Chinese Phys. B

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We present an optimal and robust quantum control method for efficient population transfer in asymmetric double quantum dot molecules. We derive a long-duration control scheme that allows for highly efficient population transfer by accurately controlling the amplitude of a narrow-bandwidth pulse. To overcome fluctuations in control field parameters, we employ a frequency-domain quantum optimal control theory method to optimize the spectral phase of a single pulse with broad bandwidth while preserving the spectral amplitude. We show that this spectral-phase-only optimization approach can successfully identify robust and optimal control fields, leading to efficient population transfer to the target state while concurrently suppressing population transfer to undesired states. The method demonstrates resilience to fluctuations in control field parameters, making it a promising approach for reliable and efficient population transfer in practical applications.

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Section: Introductionmentioning

confidence: 99%

Optimal and robust control of population transfer in asymmetric quantum-dot molecules

Guo 郭,

Ma 马,

Shu 束

2024

Chinese Phys. B

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“…For example, one enantiomeric form is beneficial in designing pharmaceuticals, while the other one is useless or even harmful. Thus, enantiodiscrimination [3][4][5][6][7][8][9][10][11][12][13][14][15], spatial enantio-separation [16][17][18][19][20][21][22][23], enantio-specific state transfer [24][25][26][27][28][29][30][31][32][33][34][35][36][37], and enantioconversion [38][39][40][41][42][43][44][45][46] of chiral mixtures are currently important research topics in the chemical and biological fields.…”

Section: Introductionmentioning

confidence: 99%

“…In the past two decades, based on the threelevel ∆-type model of chiral molecules, some theoretical schemes on enantio-discrimination [3][4][5][6][7][8][9][10][11][12][13][14][15], spatial enantio-separation [16][17][18][19][20][21][22][23], and enantio-specific state transfer [24][25][26][27][28][29][30][31][32][33][34][35][36][37] have been proposed. The three-level ∆-type model is composed of three electromagnetic fields coupled respectively to three related electric-dipole transitions of chiral molecules.…”

Section: Introductionmentioning

confidence: 99%

“…The three-level ∆-type model is composed of three electromagnetic fields coupled respectively to three related electric-dipole transitions of chiral molecules. By taking advantage * yongli@hainanu.edu.cn of the property of the overall phase-difference π of the three Rabi frequencies for the two enantiomers, enantiodiscrimination [3][4][5][6][7][8][9][10][11][12][13][14][15], spatial enantio-separation [16][17][18][19][20][21][22][23], and enantio-specific state transfer [24][25][26][27][28][29][30][31][32][33][34][35][36][37] of chiral mixtures can be achieved. Particularly, the experiments on enantio-discrimination [47][48][49][50][51][52][53] and enantio-specific state transfer [54][55][56] have been achieved based on the three-level ∆-type model of chiral molecules.…”

Section: Introductionmentioning

confidence: 99%

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Optical-pumping enantio-conversion of chiral mixtures in presence of tunneling between chiral states

Zou¹,

Li²

2023

Preprint

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Enantio-conversion of chiral mixtures has become an important research topic in chemical and biological fields. Here we propose a scheme for enantio-conversion of chiral mixtures via optical pumping based on a four-level model of chiral molecules composed of two chiral ground states and two achiral excited states, in which there exists a tunneling interaction between the chiral states. By eliminating one of the achiral excited states in the case of large detuning and well designing the detuning and coupling strengths of the electromagnetic fields, the induced indirect tunneling interaction between the chiral ground states can be cancelled with the direct tunneling interaction, and the induced indirect interaction between the left-handed chiral state and the remained achiral excited state can be cancelled with the direct one between them. Hence, the left-handed ground state is unchanged and the right-handed one can be excited to an achiral excited state, i.e., establishing chiral-state-selective excitations. By numerically calculating the populations of two chiral ground states, we find that the high enantiomeric excess can be achieved with almost only the left-handed ground state being populated. That means the high-efficiency enantio-conversion of chiral mixtures is realized under the combining effect of the system dissipation and the chiral-stateselective excitations.

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Enantiomer-Specific Pumping of Chiral Molecules

Zou,

Li,

Zhang

2024

J. Phys. Chem. Lett.

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Enantiomer-specific state transfer (ESST), which involves transferring enantiomers with different handedness of a chiral molecule into different-energy internal states, is a challenging yet significant task. Previous ESST methods are based on dynamic processes and thus require the preparation of initial states and precise control of microwave operation times. We propose a novel ESST approach, called enantiomer-specific pumping (ESP), which is based on a dissipative process and thereby eliminates the need for these two technical requirements. This approach utilizes a special microwave-induced dark state that appears exclusively for the enantiomer with a specific handedness. Specifically, in ESP, the enantiomer lacking the dark state can be pumped out of the subspace of relevant internal states, while the enantiomer with the dark state maintains a finite probability within this subspace, offering high efficiency in ESST. Notably, ESP facilitates enantiodetection without the need for enantiopure samples as reference.

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Enantiomer-specific state transfer of chiral molecules in cyclic three-level systems with SU(2) structures

Cited by 7 publications

References 58 publications

Optimal and robust control of population transfer in asymmetric quantum-dot molecules

Optimal and robust control of population transfer in asymmetric quantum-dot molecules

Optical-pumping enantio-conversion of chiral mixtures in presence of tunneling between chiral states

Enantiomer-Specific Pumping of Chiral Molecules

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