Quantum State Conversion in Two-Level System Without Rotating-Wave Approximation via Non-Hermitian Shortcuts to Adiabaticity

Adiabatic theorem has found many important applications in quantum physics. Shortcuts to adiabaticity can effectively accelerate adiabatic process. We consider a two-level system (TLS) without rotating-wave approximation (RWA). Here, we propose a scheme to implement quantum state completely transfer...

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Bibliographic Details
Published inInternational journal of theoretical physics Vol. 58; no. 8; pp. 2692 - 2702
Main Authors Li, Hong, Zhang, Si-Qi, Li, Mei-Xuan, Guo, Ming, Song, Li-Jun
Format Journal Article
LanguageEnglish
Published New York Springer US 15.08.2019
Springer Nature B.V
Subjects
Adiabatic flow
Approximation
Conversion
Elementary Particles
Helium
Mathematical analysis
Mathematical and Computational Physics
Physics
Physics and Astronomy
Quantum Field Theory
Quantum Physics
Quantum theory
Rotation
Theoretical
Without rotating-wave approximation
Quantum state conversion
Non-Hermitian shortcuts to adiabaticity
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Summary:Adiabatic theorem has found many important applications in quantum physics. Shortcuts to adiabaticity can effectively accelerate adiabatic process. We consider a two-level system (TLS) without rotating-wave approximation (RWA). Here, we propose a scheme to implement quantum state completely transfer. In our scheme, by adding unbalanced imaginary terms, now the Hamiltonian of the system is non-Hermitian form, we can nullify the nonadiabatic coupling and achieve fast quantum state conversion with high fidelity. The perfect population transfer can be achieved within a short time.
ISSN:0020-7748
1572-9575
DOI:10.1007/s10773-019-04159-8