Echo-Based Quantum Memory

Campbell, Geoff; Ferguson, Katherine; Sellars, Matthew; Buchler, Benjamin; Lam, Ping Koy

doi:10.48550/arxiv.1902.04313

Cited by 1 publication

(2 citation statements)

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“…[11] Furthermore, the bandwidth of the quantum memory determines the wavelength compatibility with the interfacing entangled photon source and affects the achievable repetition rates. [45] Several quantum memory schemes have been developed so far. Quantum memories based on EIT were first described by Fleischhauer and Lukin in 2002.…”

Section: Quantum Memoriesmentioning

confidence: 99%

“…[39,40] Other approaches, in contrast, are based on collective excitations in atomic ensembles [41,42] or rare-earth crystals coupled to photonic crystal cavities [43] to exploit the enhanced coupling to light. High standards such as high efficiency of the strong coupling between atoms and photons, [44] long storage times, [11] and bandwidth matching with other components in the quantum network [45] are requested and constitute the figures of merit of a quantum memory performance.…”

Section: Introductionmentioning

confidence: 99%

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Quantum dot technology for quantum repeaters: from entangled photon generation toward the integration with quantum memories

Neuwirth

Basset

Rota

et al. 2021

Mater. Quantum. Technol.

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The realization of a functional quantum repeater is one of the major research goals in long-distance quantum communication. Among the different approaches that are being followed, the one relying on quantum memories interfaced with deterministic quantum emitters is considered as one of the most promising solutions. In this work, we focus on the hardware to implement memory-based quantum-repeater schemes that rely on semiconductor quantum dots for the generation of polarization entangled photons. Going through the most relevant figures of merit related to efficiency of the photon source, we select significant developments in fabrication, processing and tuning techniques aimed at combining high degree of entanglement with on-demand pair generation, with a special focus on the progress achieved in the representative case of the GaAs system. We proceed to offer a perspective on integration with quantum memories, both highlighting preliminary works on natural-artificial atomic interfaces and commenting a wide choice of currently available and potentially viable memory solutions in terms of wavelength, bandwidth and noise-requirements. To complete the overview, we also present recent implementations of entanglement-based quantum communication protocols with quantum dots and highlight the next challenges ahead for the implementation of practical quantum networks.

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Section: Quantum Memoriesmentioning

confidence: 99%