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QI: Fachverband Quanteninformation

QI 31: Single Quantum Emitters (joint session Q/QI)

QI 31.1: Invited Talk

Thursday, March 9, 2023, 14:30–15:00, E214

Quantum information with atomic quantum metasurfaces and integrated nanophotonics — •Rivka Bekenstein for the SHIPTRAP collaboration — Hebrew University, Jerusalem, Israel

Quantum information processing with photonic qubits requires on-demand single photon sources, linear components, along with more advanced components such as quantum memories and deterministic nonlinearity to implement logic gates between photonic qubits. I will discuss two promising systems for generating and controlling photonic qubits. I will first present our fiber-coupled single-photon-source based on silicon-vacancy centers in nanophotonic cavity diamond. This source features high efficiency, purity, temporal control, and integrability. We have been able to demonstrate arbitrarily temporally shaped single photon pulses with high purity (g2(0) = 0.0168) and detection efficiency of 14.9. This achievement combined with previously demonstrated spin-photon gates and long-lived memory, enables on-demand generation of streams of correlated photons useful for one-way quantum computation. I will then present our quantum-metasurfaces-based quantum protocols for large-scale entanglement generation and quantum holography. These work build upon our recent analysis of quantum metasurfaces: two-dimensional atomic arrays which control light coherently by scattering.