Prospects for storage and retrieval of a quantum dot single photon in an ultracold ${}^{87}$Rb ensemble

Abstract

Epitaxially grown quantum dots (QDs) are promising sources of non-classical states of light such as single photons and entangled photons. However, in order for them to be used as a resource for long-distance quantum communication, distributed quantum computation, or linear optics quantum computing, these photons must be coupled efficiently to long-lived quantum memories as part of a quantum repeater network. Here, we theoretically examine the prospects for efficient storage and retrieval of a QD-generated single photon with a 1 ns lifetime in a multi-level atomic system. We calculate using an experimentally demonstrated optical depth of 150 that the storage (total) efficiency can exceed 46% (28%) in a dense, ultracold ensemble of ${}^{87}$Rb atoms. Furthermore, we find that the optimal control pulse required for storage and retrieval can be obtained using a diode laser and an electro-optic modulator rather than a mode-locked, pulsed laser source. Increasing the optical depth, for example by using Bose-condensed ensembles or an optical cavity, can increase the efficiencies to near unity. Aside from enabling a high-speed quantum network based on QDs, such an efficient optical interface between an atomic ensemble and a QD can also lead to entanglement between collective spin-wave excitations of atoms and the spin of an electron or hole confined in the QD.

18 pages, 16 figures

References in corpus (20)

• The Quantum Internet
• Quantum Computing
• Quantum teleportation between light and matter
• On-demand semiconductor single-photon source with near-unity indistinguishability
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Storage of Photonic Entanglement in a Crystal
• A Single-Atom Quantum Memory
• Universal Approach to Optimal Photon Storage in Atomic Media
• A millisecond quantum memory for scalable quantum networks
• Photon storage in Lambda-type optically dense atomic media. II. Free-space model
• Efficient and long-lived quantum memory with cold atoms inside a ring cavity
• Photon storage in Lambda-type optically dense atomic media. I. Cavity model
• Mapping broadband single-photon wavepackets into an atomic memory
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Interfacing Collective Atomic Excitations and Single Photons
• Two-photon interference using background-free quantum frequency conversion of single photons from a semiconductor quantum dot
• Carrier relaxation mechanisms in self-assembled (In,Ga)As/GaAs quantum dots: Efficient P -> S Auger relaxation of electrons
• Photon storage in Lambda-type optically dense atomic media. IV. Optimal control using gradient ascent
• Gradient echo memory in an ultra-high optical depth cold atomic ensemble
• Realization of Coherent Optically Dense Media via Buffer-Gas Cooling

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• On-demand semiconductor source of 780 nm single photons with controlled temporal wave packets
• Frequency Feedback for Two-Photon Interference from Separate Quantum Dots
• Correlations between Optical Properties and Voronoi-Cell Area of Quantum Dots
• Large-Range Frequency Tuning of a Narrow-Linewidth Quantum Emitter
• Slow and fast light behavior of single photons from a quantum dot interacting with the excited state hyperfine structure of the Cesium D1-line
• Modulation of single-photon-level wave packets with two-component electromagnetically induced transparency
• Optimization and readout-noise analysis of a warm vapor EIT memory on the Cs D1 line
• Resonance fluorescence from an atomic-quantum-memory compatible single photon source based on GaAs droplet quantum dots
• Deterministic photon storage and readout in a semimagnetic quantum-dot--cavity system doped with a single Mn ion