Pulse Control of Dephasing in Two-Level Quantum Systems(General)
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概要
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The pulse control of dephasing is studied for a two-level quantum system (qubit) interacting with a quantum environment. It has been shown that dephasing in a qubit due to qubit-environment interactions can be suppressed by a sequence of periodic π pulses with infinitely short duration. To study how the effectiveness of the pulse control is affected by finite pulse duration t_d, we calculate the time evolution of the reduced density operator for a qubit under a sequence of π pulses. We show that the pulse control is effective even for not short t_d if a suitable pulse sequence is adopted.
- 一般社団法人日本物理学会の論文
- 2005-08-15
著者
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Takane Yositake
Department Of Applied Physics Osaka City University
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Murakami Takahiro
Department Of Applied Chemistry School Of Engineering Tokai University
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