Deterministic CNOT gate and entanglement swapping for photonic qubits using a quantum-dot spin in a double-sided optical microcavity

Abstract

We propose a deterministic and scalable scheme to construct a two-qubit controlled-NOT (CNOT) gate and realize entanglement swapping between photonic qubits using a quantum-dot (QD) spin in a double-sided optical microcavity. The scheme is based on spin selective photon reflection from the cavity and can be achieved in a nondestructive and heralded way. We assess the feasibility of the scheme and show that the scheme can work in both the weak coupling and the strong coupling regimes. The scheme opens promising perspectives for long-distance photonic quantum communication and distributed quantum information processing.

18 pages, 5 figures; to appear in Physics Letters A

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• Toward The Universal Quantum Cloner Limit For Designing Compact Photonic CNOT Gate
• General spin systems without genuinely multipartite nonlocality
• Study of Microwave Assisted CNOT Gate
• Implementation of controlled-NOT quantum gate by nonlinear coupled electro-nano-optomechanical oscillators