Fast storage of photons in cavity-assisted quantum memories

Abstract

Ideal photonic quantum memories can store arbitrary pulses of light with unit efficiency. This requires operating in the adiabatic regime, where pulses have a duration much longer than the bandwidth of the memory. In the non-adiabatic regime of short pulses, memories are therefore imperfect, and information is always lost. We theoretically investigate the bandwidth limitations for setups based on individual atoms, or ensembles thereof, confined inside optical cavities. We identify an effective strategy for optimizing the efficiencies of the storage and retrieval process regardless of the duration of the pulses. Our protocol is derived almost completely analytically and attains efficiencies better than or comparable to those obtained by numerical optimization. Furthermore, our results provide an improved understanding of the performance of quantum memories in several regimes. When considering pulses defined on an infinite time interval, the shapes can be divided into two categories, depending on their asymptotic behaviours. If the intensity of the pulse increases with time slower than or as an exponential function, then the storage efficiency is only limited by the pulse width. For pulses defined on a finite interval, on the other hand, the efficiency is determined by the shape at the beginning of the storage or, correspondingly, at the end of the retrieval process.

arXiv comment21 pages, 8 figures, all kinds of feedback welcome

References in corpus (59)

• Long-distance quantum communication with atomic ensembles and linear optics
• Quantum state transfer and entanglement distribution among distant nodes in a quantum network
• Interfacing single photons and single quantum dots with photonic nanostructures
• Quantum interface between light and atomic ensembles
• Experimental demonstration of quantum memory for light
• Quantum memory for photons: I. Dark state polaritons
• Multimode quantum memory based on atomic frequency combs
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• A quantum memory for orbital angular momentum photonic qubits
• Mapping photonic entanglement into and out of a quantum memory
• Quantum Storage of Photonic Entanglement in a Crystal
• Quantum Memories. A Review based on the European Integrated Project "Qubit Applications (QAP)"
• Exponential improvement in photon storage fidelities using subradiance and "selective radiance" in atomic arrays
• A Single-Atom Quantum Memory
• State Transfer Between a Mechanical Oscillator and Microwave Fields in the Quantum Regime
• Universal Approach to Optimal Photon Storage in Atomic Media
• Spectral multiplexing for scalable quantum photonics using an atomic frequency comb quantum memory and feed-forward control
• Phonon-mediated quantum state transfer and remote qubit entanglement
• Coupling a single atomic quantum bit to a high finesse optical cavity
• Reversible state transfer between light and a single trapped atom
• A millisecond quantum memory for scalable quantum networks
• Strong interaction between light and a single trapped atom without a cavity
• Highly efficient coherent optical memory based on electromagnetically induced transparency
• Single-photon-level quantum memory at room temperature
• Quantum memory for non-stationary light fields based on controlled reversible inhomogeneous broadening
• Photon storage in Lambda-type optically dense atomic media. II. Free-space model
• On-demand quantum state transfer and entanglement between remote microwave cavity memories
• Tunable ion-photon entanglement in an optical cavity
• Photon storage in Lambda-type optically dense atomic media. I. Cavity model
• Optimal control of light pulse storage and retrieval
• Universal Lindblad equation for open quantum systems
• Highly efficient optical quantum memory with long coherence time in cold atoms
• Impedance-matched cavity quantum memory
• Demonstration of a memory for tightly guided light in an optical nanofiber
• Input-Output Theory with Quantum Pulses
• Krotov: A Python implementation of Krotov's method for quantum optimal control
• Coherent storage and manipulation of broadband photons via dynamically controlled Autler-Townes splitting
• Controlling and Detecting Spin Correlations of Ultracold Atoms in Optical lattices
• Entangling atoms in bad cavities
• Efficient retrieval of a single excitation stored in an atomic ensemble
• Single Photons Made-to-Measure
• Efficient reversible entanglement transfer between light and quantum memories
• Single-Photon Absorption in Coupled Atom-Cavity Systems
• A Tutorial on Optimal Control and Reinforcement Learning methods for Quantum Technologies
• Optimal storage of a single photon by a single intra-cavity atom
• Quantum Control in Qutrit Systems using Hybrid Rabi-STIRAP Pulses
• Optimizing inhomogeneous spin ensembles for quantum memory
• Programmable atom-photon quantum interface
• Gaussian-wavepacket-model for single-photon generation based on cavity QED in the adiabatic and nonadiabatic conditions
• EIT-Based Quantum Memory for Single Photons from Cavity-QED
• Optimization of Broadband $\Lambda$-type Quantum Memory Using Gaussian Pulses
• Non-adiabatic Storage of Short Light Pulses in an Atom-Cavity System
• Photonic quantum memory using an intra-atomic frequency comb
• Efficient High-Fidelity Flying Qubit Shaping
• Continuous quantum light from a dark atom
• Weak coherent pulses for single-photon quantum memories
• Cavity-assisted atomic Raman memories beyond the bad cavity limit: effect of four-wave mixing
• Limits of single-photon storage in a single $\Lambda$-type atom
• Retrieval of single photons from solid-state quantum transducers

Cited by in corpus (4)

• Comparing One- and Two-way Quantum Repeater Architectures
• Uniting Quantum Processing Nodes of Cavity-coupled Ions with Rare-earth Quantum Repeaters Using Single-photon Pulse Shaping Based on Atomic Frequency Comb
• Quantum-Processing-Assisted Classical Communications
• Optimal Strategies for Optical Quantum Memories Using Long-Lived Noble-Gas Spins