Arbitrary quantum superposition state for three-level system using oscillating dark states |
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Authors: | Jun He Yong-Sheng Zhang Xiang-Fa Zhou Qun-Feng Chen Guang-Can Guo |
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Institution: | Key Laboratory of Quantum Information, University of Science and Technology of China (CAS), Hefei, Anhui 230026, China |
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Abstract: | An method for adiabatic population transfer and the preparation of an arbitrary quantum superposition state using the oscillating dark states (ODS) in atomic system is presented. Quantum state of a three-level Λ configuration atomic system finally evolves into the same time-dependent state, and oscillates periodically between two ground levels under evolving adiabatic conditions when two pairs of classical detuning laser fields drive the system into the ODS forcedly, whatever the initial states of the system are. The decoherence of the ODS evolution is greatly suppressed and the oscillation is very stable, therefore adiabatic population transfer and the preparation of an arbitrary quantum superposition state of atomic system can be completed accurately and conveniently. |
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Keywords: | 42 50 Gy 37 10 Jk |
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