Time-frequency encoded single-photon sources and broadband quantum memories based on a tunable one-dimensional atom

Abstract

A one-dimensional atom -- an atomic system coupled to a single optical mode -- is central for many applications in optical quantum technologies. Here we introduce an effective one-dimensional atom consisting of two interacting quantum emitters coupled to a cavity mode. The dipole-dipole interaction and cavity coupling gives rise to optical resonances of tunable bandwidth with a constant mode coupling. Such versatility, combined with a dynamical control of the system, opens the way to many applications. It can be used to generate single photon light pulses with continuous variable encoding in the time-frequency domain and light states that show sub-Planck features. It can also be exploited to develop a versatile quantum memory of tunable bandwidth, another key ingredient for quantum networks. Our scheme ensures that all above functionalities can be obtained at record high efficiencies. We discuss practical implementation in the most advanced platform for quantum light generation, namely the semiconductor quantum dot system where all the technological tools are in place to bring these new concepts to reality.

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Cited by in corpus (4)

• Coherence in Cooperative Photon Emission from Indistinguishable Quantum Emitters
• Spectral Engineering of Cavity-Protected Polaritons in an Atomic Ensemble with Controlled Disorder
• All-optical Tuning of Indistinguishable Single-Photons Generated in Three-level Quantum Systems
• Asymmetric comb waveguide for strong interactions between atoms and light