Arbitrary state controlled-unitary gate between two remote atomic qubits via adiabatic passage |
| |
Authors: | Ju-Mei Chen Lin-Mei Liang Cheng-Zu Li Zhi-Jiao Deng |
| |
Institution: | aDepartment of Physics, National University of Defense Technology, Changsha, Hunan 410073, People’s Republic of China |
| |
Abstract: | We generalize the scheme of Lacour et al. X. Lacour, N. Sangouard, S. Guerin, H.R. Jauslin, Phys. Rev. A 73 (2006) 042321] to the case of nonlocal qubits, which makes the resultant gate suitable for distributed quantum computation. In our scheme, two remote atomic qubits are separately trapped in two distant cavities connected by an optical fiber. Based on adiabatic passage, our scheme is immune to the decoherence due to spontaneous emission and to photon decay from the cavity modes and the fiber mode. Moreover, our scheme can work robustly beyond the Lamb–Dicke limit. It is shown that the minimum fidelity of the resultant gate operation for an arbitrary input state could be over 0.98. |
| |
Keywords: | 03 67 Pp 03 67 Lx 42 50 Pq |
本文献已被 ScienceDirect 等数据库收录! |
|