Enhanced Quantum Interface with Collective Ion-Cavity Coupling

Abstract

We prepare a maximally entangled state of two ions and couple both ions to the mode of an optical cavity. The phase of the entangled state determines the collective interaction of the ions with the cavity mode, that is, whether the emission of a single photon into the cavity is suppressed or enhanced. By adjusting this phase, we tune the ion--cavity system from sub- to superradiance. We then encode a single qubit in the two-ion superradiant state and show that this encoding enhances the transfer of quantum information onto a photon.

References in corpus (6)

• The Quantum Internet
• Quantum computing with trapped ions
• Towards fault-tolerant quantum computing with trapped ions
• Cavity-Modified Collective Rayleigh Scattering of Two Atoms
• Single-Photon Superradiance in Cold Atoms
• Ion crystal transducer for strong coupling between single ions and single photons

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• Quantum State Transfer via Noisy Photonic and Phononic Waveguides
• Cavity-Modified Collective Rayleigh Scattering of Two Atoms
• Cooperative eigenmodes and scattering in 1D atomic arrays
• Intracavity Rydberg atom electromagnetically induced transparency using a high finesse optical cavity
• Controlling collective spontaneous emission with plasmonic waveguides
• Ion trap architectures and new directions
• Ion-photon entanglement and quantum frequency conversion with trapped Ba${}^{+}$ ions
• A network-ready random-access qubits memory
• Hybrid Photonic Loss Resilient Entanglement Swapping
• Decoherence and collective effects in critical media
• Ion crystals in anharmonic traps