Towards quantum entanglement of micromirrors via a two-level atom and radiation pressure
Zhi-Rong Zhong1(), Xin Wang2, Wei Qin3
1. Fujian Key Laboratory of Quantum Information and Quantum Optics, College of Physics and Information Engineering, Fuzhou University, Fuzhou 350116, China 2. Institute of Quantum Optics and Quantum Information, School of Science, Xi’an Jiaotong University, Xi’an 710049, China 3. Quantum Physics and Quantum Information Division, Beijing Computational Science Research Center, Beijing 100193, China
We propose a method to entangle two vibrating microsize mirrors (i.e., mechanical oscillators) in a cavity optomechanical system. In this scheme, we discuss both the resonant and large-detuning conditions, and show that the entanglement of two mechanical oscillators can be achieved with the assistance of a two-level atom and cavity-radiation pressure. In the resonant case, the operation time is relatively short, which is desirable to minimize the effects of decoherence. While in the large-detuning case, the cavity is only virtually excited during the interaction. Therefore, the decay of the cavity is effectively suppressed, which makes the efficient decoherence time of the cavity to be greatly prolonged. Thus, we observe that this virtual-photon process of microscopic objects may induce the entanglement of macroscopic objects. Moreover, in both cases, the generation of entanglement is deterministic and no measurements on the atom and the cavity are required. These are experimentally important. Finally, the decoherence effect and the experimental feasibility of the proposal are briefly discussed.
. [J]. Frontiers of Physics, 2018, 13(5): 130319.
Zhi-Rong Zhong, Xin Wang, Wei Qin. Towards quantum entanglement of micromirrors via a two-level atom and radiation pressure. Front. Phys. , 2018, 13(5): 130319.
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