Nonadiabatic quantum state engineering by time-dependent decoherence-free subspaces in open quantum systems

We extend the theory of quantum state engineering (QSE) to the open quantum systems which simultaneously suffer time-dependent decoherence and time-independent decoherence. A hybrid approach is proposed to effectively realize QSE by combination of time-dependent decoherence-free subspaces and shortc...

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Published in:New journal of physics 2021-11, Vol.23 (11), p.113005
Main Authors: Wu, Qi-Cheng, Zhou, Yan-Hui, Ye, Biao-Liang, Liu, Tong, Yang, Chui-Ping
Format: Article
Language:English
Subjects:
Data processing
Design
Engineering
Information storage
Open systems
Physics
Quantum computing
Quantum phenomena
quantum state
Qubits (quantum computing)
Robustness (mathematics)
shortcuts to adiabaticity
Subspaces
Time dependence
time-dependent decoherence-free subspace
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cited_by cdi_FETCH-LOGICAL-c449t-bb16ae724dc1b62c67d9745bc749b050e01d760be2afae76efdddb09e30d9d503
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creator Wu, Qi-Cheng
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description We extend the theory of quantum state engineering (QSE) to the open quantum systems which simultaneously suffer time-dependent decoherence and time-independent decoherence. A hybrid approach is proposed to effectively realize QSE by combination of time-dependent decoherence-free subspaces and shortcuts to adiabaticity theories. As an application, a concrete single-qubit QSE example with an open five-level system is presented. Numerical simulations confirm that the approach is reliable and robust against both of time-dependent decoherence and time-independent decoherence. Certain dissipation effects are no longer harmful but play a positive role in the QSE. In addition, the approach can be generalized to realize QSE in high-dimensional quantum systems. Therefore, this proposal is quite useful for quantum computation and quantum information processing in open systems.
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subjects Data processing
Design
Engineering
Information storage
Open systems
Physics
Quantum computing
Quantum phenomena
quantum state
Qubits (quantum computing)
Robustness (mathematics)
shortcuts to adiabaticity
Subspaces
Time dependence
time-dependent decoherence-free subspace
title Nonadiabatic quantum state engineering by time-dependent decoherence-free subspaces in open quantum systems
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