Loss-resistant state teleportation and entanglement swapping using a quantum-dot spin in an optical microcavity

Abstract

We present a scheme for efficient state teleportation and entanglement swapping using a single quantum-dot spin in an optical microcavity based on giant circular birefringence. State teleportation or entanglement swapping is heralded by the sequential detection of two photons, and is finished after the spin measurement. The spin-cavity unit works as a complete Bell-state analyzer with a built-in spin memory allowing loss-resistant repeater operation. This device can work in both the weak coupling and the strong coupling regime, but high efficiencies and high fidelities are only achievable when the side leakage and cavity loss is low. We assess the feasibility of this device, and show it can be implemented with current technology. We also propose a spin manipulation method using single photons, which could be used to preserve the spin coherence via spin echo techniques.

The manuscript is extended, including BSA fidelity, efficiency, and a compatible scheme for spin manipulations and spin echoes to prolong the spin coherence

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• Spin-based single-photon transistor, dynamic random access memory, diodes and routers in semiconductors
• Extended linear regime of cavity-QED enhanced optical circular birefringence induced by a charged quantum dot
• Resource-efficient analyzer of Bell and Greenberger-Horne-Zeilinger states of multiphoton systems
• Self-error-corrected hyperparallel photonic quantum computation working with both the polarization and the spatial-mode degrees of freedom
• Dissipative entanglement swapping in the presence of detuning and Kerr medium: Bell state measurement method
• Efficient deterministic giant photon phase shift from a single charged quantum dot
• Dynamics and Protecting of Entanglement in Two-Level Systems Interacting with a Dissipative Cavity: The Gardiner-Collett Approach
• Investigation of defect cavities formed in three-dimensional woodpile photonic crystals
• Activating remote entanglement in a quantum network by local counting of identical particles
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• Theory of optical spin control in quantum dot microcavities
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• Ultrafast pulse phase shift in a charged quantum dot- micropillar system
• Implementations of more general solid-state (SWAP)${}^{1/m}$ and controlled-(swap)${}^{1/m}$ gates
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• Qubit Movement-Assisted Entanglement Swapping
• Systematic entanglement concentration for unknown less-entangled three-photon W states
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• Noise effects and tomography of remote entangled spins in quantum dots
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• Spin-photon Qubits for Scalable Quantum Network
• Spin-augmented observables for efficient photonic quantum error correction
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