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Quantum controlled phase gate based on two nonresonant quantum dots trapped in two coupled photonic crystal cavities

Jian‐Qi Zhang, Ya-Fei Yu, Xun‐Li Feng +1 more

We propose a scheme for realizing two-qubit quantum phase gates with two nonidentical quantum dots trapped in two coupled photonic crystal cavities and driven by classical laser fields. During the gate operation, neither the cavity modes nor the quantum dots are excited, so the decoherence can be suppressed. The system can acquire a phase conditional upon the states of the quantum dots, which can be used to realize the controlled phase gate.

arXiv:1012.0928Dec 4, 20100 citations

A Spin Qubit Coupled to a Photonic Crystal Cavity

Timothy M. Sweeney, Samuel Carter, Mijin Kim +7 more

Bulletin of the American Physical SocietyMar 18, 20130 citations

Quantum Electrodynamics in Photonic Crystal Nanocavities towards Quantum Information Processing

Yun‐Feng Xiao, Xu‐Bo Zou, Qihuang Gong +2 more

In this Chapter, with the nanocavities in photonic crystal, we theoretically introduce, derive, and demonstrate the robust implementation of a single spin-photon phase gate in a cavitydipole-cavity system. The conditions of accidental degeneracy are examined to enforce complete transfer, either in the forward transmission or in reflection, of the qubit. In addition, we observe that a photon pulse is strikingly reflected by a cavity interacting with a single spin, even under the bad-cavity limit. This combined nanocrystal-cavity system,In this Chapter, with the nanocavities in photonic crystal, we theoretically introduce, derive, and demonstrate the robust implementation of a single spin-photon phase gate in a cavitydipole-cavity system. The conditions of accidental degeneracy are examined to enforce complete transfer, either in the forward transmission or in reflection, of the qubit. In addition, we observe that a photon pulse is strikingly reflected by a cavity interacting with a single spin, even under the bad-cavity limit. This combined nanocrystal-cavity system,

InTech eBooksJan 1, 20101 citation

The Implementation of Quantum Phase Gate in Three Cavity-Atoms System

贾文涛 JIA Wen-tao, 夏立新 XIA Li-xin, 李超 LI Chao

Acta Sinica Quantum OpticaJan 1, 20150 citations

Photonic crystal-based tristate phase shift quantum gates using joint encoding of frequency and phase

Mir Nadim Sarfaraj, Sourangshu Mukhopadhyay

Journal of OpticsNov 1, 20239 citations

Nanocrystals in silicon photonic crystal standing-wave cavities as spin-photon phase gates for quantum information processing

Y.-F. Xiao, J. Gao, X. Yang +3 more

By virtue of a silicon high-Q photonic crystal nanocavity, we propose and examine theoretically interactions between a stationary electron spin qubit of a semiconductor nanocrystal and a flying photon qubit. Firstly, we introduce, derive, and demonstrate the explicit conditions toward realization of a spin-photon phase gate, and propose these interactions as a generalized quantum interface for quantum information processing. Secondly, we examine single-spin-induced reflections as direct evidence of intrinsic bare and dressed modes in our coupled nanocrystal-cavity system.By virtue of a silicon high-Q photonic crystal nanocavity, we propose and examine theoretically interactions between a stationary electron spin qubit of a semiconductor nanocrystal and a flying photon qubit. Firstly, we introduce, derive, and demonstrate the explicit conditions toward realization of a spin-photon phase gate, and propose these interactions as a generalized quantum interface for quantum information processing. Secondly, we examine single-spin-induced reflections as direct evidence of intrinsic bare and dressed modes in our coupled nanocrystal-cavity system.

arXiv:0706.0064Applied Physics LettersOct 8, 200716 citations

Realization of Quantum State Transfer and Phase Gate Based on Photonic Crystal Cavity Chain

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