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Quantum phase gate through the dispersive atom–field interaction with atoms trapped in optical cavity QED

Dong Dong, Yan‐Lei Zhang, Chang‐Ling Zou +2 more

Physics Letters AJul 16, 20156 citations

Robust Deterministic Controlled Phase-Flip Gate and Controlled-Not Gate Based on Atomic Ensembles Embedded in Double-Sided Optical Cavities

A‐Peng Liu, Liu‐Yong Cheng, Qi Guo +1 more

International Journal of Theoretical PhysicsNov 10, 20170 citations

Universal Controlled-Phase Gates Between Distant Atoms Separately Trapped in Thermal Cavities

Dong Wang, Ye Liu

International Journal of Theoretical PhysicsSep 20, 20140 citations

Implementation of a remote three-qubit controlled-Z gate for atoms separately trapped in cavities coupled by optical fibres

Yan‐Ling Li, Mao-Fa Fang, Xing Mao Xiao +1 more

We propose a scheme for implementing a remote three-qubit controlled-Z gate with three atoms separately trapped in three distant cavities coupled by optical fibres. The influences of various decoherence processes, such as spontaneous emission of the atoms and photon leakage of the cavities and the optical fibres, on the fidelity are also investigated. It is found that the gate can be implemented with high fidelity even when these decoherence processes are considered. This scheme can be extended to the implementation of a remote N -qubit controlled-Z gate with N atoms separately trapped in N distant cavities coupled by optical fibres.We propose a scheme for implementing a remote three-qubit controlled-Z gate with three atoms separately trapped in three distant cavities coupled by optical fibres. The influences of various decoherence processes, such as spontaneous emission of the atoms and photon leakage of the cavities and the optical fibres, on the fidelity are also investigated. It is found that the gate can be implemented with high fidelity even when these decoherence processes are considered. This scheme can be extended to the implementation of a remote N -qubit controlled-Z gate with N atoms separately trapped in N distant cavities coupled by optical fibres.

Journal of Physics B Atomic Molecular and Optical PhysicsAug 4, 20107 citations

Resonant scheme for realizing quantum phase gates for two separate atoms via coupled cavities

Zhen‐Biao Yang, Yan Xia, Shi‐Biao Zheng

Optics CommunicationsApr 16, 20108 citations

One-step implementation of an N -qubit quantum phase gate through a double Raman passage

Haiyan Lü, Yu Ya-Fei, Zhi‐Ming Zhang

We propose a scheme for controllably implementing an N -qubit phase gate by one step within a ground-state subspace of N three-state atoms trapped in a cavity through a double Raman passage. We can extend our scheme to the realisation of an arbitrary N -qubit phase gate by appropriately adjusting coupling strengths and detunings between atoms and external driving fields. The advantage of this one-step scheme is its robustness against decoherence.

Chinese Physics BMar 1, 20102 citations

Double controlled quantum phase gate based on three atoms trapped in separate optical cavities

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Double controlled quantum phase gate based on three atoms trapped in separate optical cavities

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