Regulation of Optimal Entropy Squeezing Sudden Generation for a Moving Atomic Qubit Interacting with the Coherent Fields via Two-Photon Process
From the quantum information point of view, we investigate the regulation of optimal entropy squeezing sudden generation (OESSG) and disappearance (OESSD) for a moving atomic qubit interacting with the coherent field via two-photon process. It is shown that physical substance of atomic OESSG is entanglement sudden death of the atomic qubit and field, and atomic OESSD corresponds to the transient entanglement resurrection of atomic qubit and field. The duration, number component and stable cycle of the atomic OESSG can be controlled by choosing the initial atomic distribution angle 𝜗 and structure parameter p of the field mode, respectively. We realize the periodic exchange of atomic OESSG of components Sx and Sy, and also propose the exchange preparation scheme of atomic optimal entropy squeezing state. Our proposal may be useful for instantaneous control of quantum noise and retention of maximum coherent states of single atomic qubit in the noisy environment.
KeywordsOptimal entropy squeezing sudden generation Moving atomic qubit Field mode structure parameter Optimal entropy squeezing state
This work was supported by the National Science Foundation of China (NSFC) under Grants No. 11405052 and Key Laboratory of Low Dimensional Quantum Structures and Quantum Control under Grants No. QSQC1409.
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