Entangling homogeneously broadened matter qubits in the weak-coupling cavity-QED regime

Abstract

In distributed quantum information processing, flying photons entangle matter qubits confined in cavities. However, when a matter qubit is homogeneously broadened, the strong-coupling regime of cavity QED is typically required, which is hard to realize in actual experimental setups. Here, we show that a high-fidelity entanglement operation is possible even in the weak-coupling regime in which dampings (dephasing, spontaneous emission, and cavity leakage) overwhelm the coherent coupling between a qubit and the cavity. Our proposal enables distributed quantum information processing to be performed using much less demanding technology than previously.

References in corpus (9)

• Cavity QED with Diamond Nanocrystals and Silica Microspheres
• Robust creation of entanglement between ions in spatially separate cavities
• Quantum interference of single photons from remote nitrogen-vacancy centers in diamond
• Hybrid quantum repeater based on dispersive CQED interactions between matter qubits and bright coherent light
• Brokered Graph State Quantum Computing
• Introduction to decoherence theory
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Cited by in corpus (5)

• Error-rejecting quantum computing with solid-state spins assisted by low-Q optical microcavities
• Optical Entanglement of Distinguishable Quantum Emitters
• High-Fidelity Spin Measurement on the Nitrogen-Vacancy Center
• Entanglement generation using single-photon pulse reflection in realistic networks
• Resource state generation for a multispin register in a hybrid matter-photon quantum information processor