摘要
本文将两能级原子视为量子位。当量子位置于外部环境 (热库 )中 ,研究两个量子位约化密度矩阵非对角元的时间演化 ,分析量子位消相干规律。如果仅考虑振幅阻尼 ,结果表明热辐射与量子噪声对量子位的消相干产生影响。
The two-level atom is regarded as quantum-bit.We study quantum-bit reducible density rectangular array when the quantum-bit are put in a thermal reservoir.The time evolution properties of non-opposite angle element of rectangular array are obtained and decoherence of quantum-bit is analyzed.The results show the thermal radiation and quantum noise can influence the qubits' decoherence when amplitude damping be included in the consideration.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2001年第1期95-97,共3页
Journal of Optoelectronics·Laser
关键词
热辐射场
两能级原子
消相干
thermal radiation field
two-level atom
quantum-bit
decoherence
