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Quantum speed limit time of a non-Hermitian two-level system |
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| Authors: | Yan-Yi Wang Mao-Fa Fang |
| Affiliation: | Synergetic Innovation Center for Quantum Effects and Application |
| Abstract: | We investigated the quantum speed limit time of a non-Hermitian two-level system for which gain and loss of energy or amplitude are present. Our results show that, with respect to two distinguishable states of the non-Hermitian system, the evolutionary time does not have a nonzero lower bound. The quantum evolution of the system can be effectively accelerated by adjusting the non-Hermitian parameter, as well as the quantum speed limit time can be arbitrarily small even be zero. |
| Keywords: | quantum speed limit time non-Hermitian dynamics quantum optics |
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