Broadband coherent optical memory based on electromagnetically induced transparency

Abstract

Quantum memories, devices that can store and retrieve photonic quantum states on demand, are essential components for scalable quantum technologies. It is desirable to push the memory towards the broadband regime in order to increase the data rate. Here, we present a theoretical and experimental study on the broadband optical memory based on electromagnetically-induced-transparency (EIT) protocol. We first provide a theoretical analysis on the issues and requirements to achieve a broadband EIT memory. We then present our experimental efforts on EIT memory in cold atoms towards the broadband or short-pulse regime. A storage efficiency of ~ 80 % with a pulse duration of 30 ns (corresponding to a bandwidth of 14.7 MHz) is realized. Limited by the available intensity of the control beam, we could not conduct an optimal storage for the even shorter pulses but still obtain an efficiency of larger than 50 % with a pulse duration of 14 ns (31.4 MHz). The achieved time-bandwidth-product at the efficiency of 50 % is 1267.

References in corpus (22)

• Long-distance quantum communication with atomic ensembles and linear optics
• Dark-State Polaritons in Electromagnetically Induced Transparency
• Towards high-speed optical quantum memories
• Prospective applications of optical quantum memories
• A millisecond quantum memory for scalable quantum networks
• Efficient quantum memory for single photon polarization qubits
• Highly efficient coherent optical memory based on electromagnetically induced transparency
• Single-photon-level quantum memory at room temperature
• Photon storage in Lambda-type optically dense atomic media. II. Free-space model
• Coherent Optical Memory with High Storage Efficiency and Large Fractional Delay
• High-performance Raman quantum memory with optimal control
• Coherent scattering of near-resonant light by a Dense Microscopic Cold Atomic cloud
• Simple atomic quantum memory suitable for semiconductor quantum dot single photons
• Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting
• Fast, noise-free memory for photon synchronization at room temperature
• Optimal Storage and Retrieval of Single-Photon Waveforms
• Fidelity of photon propagation in electromagnetically induced transparency in the presence of four-wave mixing
• Discerning quantum memories based on electromagnetically-induced-transparency and Autler-Townes-splitting protocols
• A one-dimensional ultracold medium of extreme optical depth
• All-Electromagnetic Control of Broadband Quantum Excitations Using Gradient Photon Echoes
• Single-photon-level light storage in cold atoms using the Autler-Townes splitting protocol
• Theoretical study on memory-based optical converter with degenerate Zeeman states

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• Cavity-enhanced solid-state nuclear spin gyroscope
• Resonant Dipole-Dipole Interactions in Electromagnetically Induced Transparency
• Temporal modulation of a spectral compressor for efficient quantum storage
• Multi-channel quantum noise suppression and phase-sensitive modulation in a hybrid optical resonant cavity system
• Efficient quantum memory for heralded single photons generated by cavity-enhanced spontaneous parametric downconversion