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New Operator Realization of Superoperators and Its Application in Quantum Information Theory |
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| Authors: | FAN Hong-Yi HU Li-Yun |
| Affiliation: | 1.Department of Physics, Shanghai Jiao Tong University, Shanghai 200030, China;2.College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;3.Department of Material Science and Engineering, University of Science and Technology of China, Hefei 230026, China |
| Abstract: | By exposing deficiency of the usual superoperators that have no explicit operator-expression in quantum information theory we introduce thermo entangled state representation to endow each of these superoperators a definite operator-expression in an enlarged space in which one mode is a fictitious. This helps us to directly derive the role of exponential of superoperators and the solutions of some master equations. |
| Keywords: | superoperators operator-expression thermo entangled state |
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