Highly efficient optical quantum memory with long coherence time in cold atoms

Abstract

Optical quantum memory is an essential element for long distance quantum communication and photonic quantum computation protocols. The practical implementation of such protocols requires an efficient quantum memory with long coherence time. Beating the no-cloning limit, for example, requires efficiencies above 50\%. An ideal optical fibre loop has a loss of 50% in 100 $\mu$ s, and until now no universal quantum memory has beaten this time-efficiency limit. Here, we report results of a gradient echo memory (GEM) experiment in a cold atomic ensemble with a 1/e coherence time up to 1ms and maximum efficiency up to 87$\pm$2% for short storage times. Our experimental data demonstrates greater than 50% efficiency for storage times up to 0.6ms. Quantum storage ability is verified beyond the ideal fibre limit using heterodyne tomography of small coherent states.

References in corpus (13)

• The Quantum Internet
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Storage of Orbital Angular Momentum Entanglement in an Atomic Ensemble
• Quantum storage of entangled telecom-wavelength photons in an erbium-doped optical fibre
• Efficient and long-lived quantum memory with cold atoms inside a ring cavity
• Coherent Optical Memory with High Storage Efficiency and Large Fractional Delay
• Demonstration of a memory for tightly guided light in an optical nanofiber
• Coherent spin control at the quantum level in an ensemble-based optical memory
• Cavity-enhanced storage in an optical spin-wave memory
• Optimal light storage in atomic vapor
• Multi-Modal Properties and Dynamics of the Gradient Echo Quantum Memory
• Optimal Storage and Retrieval of Single-Photon Waveforms
• Electromagnetically induced transparency and four-wave mixing in a cold atomic ensemble with large optical depth

Cited by in corpus (92)

• Photonic quantum information processing: a concise review
• Efficient quantum memory for single photon polarization qubits
• Highly efficient coherent optical memory based on electromagnetically induced transparency
• Highly-Efficient Quantum Memory for Polarization Qubits in a Spatially-Multiplexed Cold Atomic Ensemble
• Light storage for one second at room temperature
• Entanglement-Assisted Quantum Networks: Mechanics, Enabling Technologies, Challenges, and Research Directions
• Quantum Storage of Frequency-Multiplexed Heralded Single Photons
• High-speed noise-free optical quantum memory
• Multi-mode and long-lived quantum correlations between photons and spins in a crystal
• Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting
• A Quantum Network Node with Crossed Optical Fibre Cavities
• Wavevector multiplexed quantum memory via spatially-resolved single-photon detection
• Multiparameter optimisation of a magneto-optical trap using deep learning
• Fast, noise-free memory for photon synchronization at room temperature
• Nanophotonic quantum storage at telecommunications wavelength
• Sub-Megahertz Single Photon Source
• Entangling metropolitan-distance separated quantum memories
• Quantum correlations between single telecom photons and a multimode on-demand solid state quantum memory
• Ultra-narrow optical inhomogeneous linewidth in a stoichiometric rare earth crystal
• A cold atom temporally multiplexed quantum memory with cavity-enhanced noise suppression
• High-performance cavity-enhanced quantum memory with warm atomic cell
• Optical-domain spectral super-resolution via a quantum-memory-based time-frequency processor
• Subradiance with saturated atoms: population enhancement of the long-lived states
• Stationary light pulses and narrowband light storage in a laser-cooled ensemble loaded into a hollow-core fiber
• Raman Quantum Memory with Built-In Suppression of Four-wave Mixing Noise
• Generation of sub-MHz and spectrally-bright biphotons from hot atomic vapors with a phase mismatch-free scheme
• Noise Free On-Demand Atomic Frequency Comb Quantum Memory
• Coherent spin-wave processor of stored optical pulses
• Quantum memories and the double-slit experiment: implications for astronomical interferometry
• Dynamical Observations of Self-Stabilising Stationary Light
• Quantum optics of spin waves through ac Stark modulation
• Deterministic Time-Bin Entanglement between a Single Photon and an Atomic Ensemble
• Experimental implementation of the optical fractional Fourier transform in the time-frequency domain
• Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory
• Temporal imaging for ultra-narrowband few-photon states of light
• A hybrid quantum repeater for qudits
• Temporally-ultralong biphotons with a linewidth of 50 kHz
• Multiresonator quantum memory-interface
• Fast, noise-free atomic optical memory with 35% end-to-end efficiency
• Polariton Exchange Interactions in Multichannel Optical Networks
• Measurement-Device-Independent Verification of a Quantum Memory
• Perspective on new implementations of atomtronic circuits
• Optical quantum memory for noble-gas spins based on spin-exchange collisions
• Surpassing the repeaterless bound with a photon-number encoded measurement-device-independent quantum key distribution protocol
• Distributed quantum computing with photons and atomic memories
• Massively-multiplexed generation of Bell-type entanglement using a quantum memory
• Identifying electronic transitions of defects in hexagonal boron nitride for quantum memories
• Quantum Interference between Photons and Single Quanta of Stored Atomic Coherence
• Persistent currents in ultracold gases
• Optimization of Broadband $\Lambda$-type Quantum Memory Using Gaussian Pulses
• Idler-free channel position finding
• Simultaneous Trapping of Two Optical Pulses in an Atomic Ensemble as Stationary Light Pulses
• Spatial spin-wave modulator for quantum memory assisted adaptive measurements
• Generation of highly retrievable atom photon entanglement with a millisecond lifetime via a spatially multiplexed cavity
• Experimental Creation of Single Rydberg Excitations via Adiabatic Passage
• Entanglement distribution with wavevector-multiplexed quantum memory
• Proposal for a long-lived quantum memory using matter-wave optics with Bose-Einstein condensates in microgravity
• Time-reversed and coherently-enhanced memory: A single-mode quantum atom-optic memory without a cavity
• Qubit teleportation between a memory-compatible photonic time-bin qubit and a solid-state quantum network node
• Superefficient cascade multiresonator quantum memory
• Dual-colour magic-wavelength trap for suppression of light shifts in atoms
• Broadband Quantum Memory in Atomic Ensembles
• Integrated optical quantum memory controlled by electro-optic effect
• Trapping a Free-propagating Single-photon into an Atomic Ensemble as a Quantum Stationary Light Pulse
• Secure authentication via Quantum Physical Unclonable Functions: a review
• Fast storage of photons in cavity-assisted quantum memories
• Hybrid Quantum Repeaters with Ensemble-based Quantum Memories and Single-spin Photon Transducers
• Parameter regimes for surpassing the PLOB bound with error-corrected qudit repeaters
• Modeling the performance and bandwidth of single-atom adiabatic quantum memories
• Idler-Free Multi-Channel Discrimination via Multipartite Probe States
• Storage of telecom wavelength heralded single photons in a fiber cavity quantum memory
• Analytical Bounds for Dynamic Multi-Channel Discrimination
• Limits of single-photon storage in a single $\Lambda$-type atom
• Efficient integrated quantum memory for light
• Storing vector-vortex states of light in intra-atomic frequency comb
• Resonant Dipole-Dipole Interactions in Electromagnetically Induced Transparency
• Optimizing Population Accumulation in Quantum States Using Microwave Spectroscopy
• Spectrum-to-position mapping via programmable spatial dispersion implemented in an optical quantum memory
• Observation of cross phase modulation in cold atom gradient echo memory
• Coherent optical two-photon resonance tomographic imaging in three dimensions
• Research progress of artificial intelligence empowered quantum communication and quantum sensing systems
• Multiplexed Quantum Communication with Surface and Hypergraph Product Codes
• Atom-Mechanical Hong-Ou-Mandel Interference
• Optimal Photon Generation from Spontaneous Raman Processes in Cold Atoms
• Light Storage in Light Cages: A Scalable Platform for Multiplexed Quantum Memories
• Electronic Noise Considerations for Designing Integrated Solid-State Quantum Memories
• Temporally-long C-band heralded single photons generated from hot atoms
• Controlled Displacement of Stored Light at Room Temperature
• Electromagnetically-induced transparency assists the Raman gradient echo memory at moderate detuning, dependent on gradient order
• Single-Photon-Level Atomic Frequency Comb Storage in Room Temperature Alkali Vapour
• High efficiency photonic storage of single photons in cold atoms
• Exploration of optimal hyperfine transitions for spin-wave storage in ${}^{167}$Er${}^{3+}$:Y${}_2$SiO${}_5$