Nonclassical thermal-state superpositions: Analytical evolution law and decoherence behavior
| Autor: | Ran Zhang, Hsi-Sheng Goan, Ji-Suo Wang, Xiang-Guo Meng |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Photon Quantum decoherence 01 natural sciences Noise (electronics) Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Amplitude Classical mechanics Law Quantum mechanics Phase space 0103 physical sciences Thermal Probability distribution Wigner distribution function Electrical and Electronic Engineering Physical and Theoretical Chemistry 010306 general physics |
| Zdroj: | Optics Communications. 411:15-20 |
| ISSN: | 0030-4018 |
| DOI: | 10.1016/j.optcom.2017.11.005 |
| Popis: | Employing the integration technique within normal products of bosonic operators, we present normal product representations of thermal-state superpositions and investigate their nonclassical features, such as quadrature squeezing, sub-Poissonian distribution, and partial negativity of the Wigner function. We also analytically and numerically investigate their evolution law and decoherence characteristics in an amplitude-decay model via the variations of the probability distributions and the negative volumes of Wigner functions in phase space. The results indicate that the evolution formulas of two thermal component states for amplitude decay can be viewed as the same integral form as a displaced thermal state ρ ( V , d ) , but governed by the combined action of photon loss and thermal noise. In addition, the larger values of the displacement d and noise V lead to faster decoherence for thermal-state superpositions. |
| Databáze: | OpenAIRE |
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