Quantum benchmarks for the storage or transmission of quantum light from minimal resources

Abstract

We investigate several recently published benchmark criteria for storage or transmission of continuous-variable quantum information. A comparison reveals that criteria based on a Gaussian distribution of coherent states are most resilient to noise. We then address the issue of experimental resources and derive an equally strong benchmark, solely based on three coherent states and homodyne detection. This benchmark is further simplified in the presence of naturally occurring random phases, which remove the need for active input-state modulation.

replaced by the published version, 5 pages, 4 figures

References in corpus (9)

• Unconditional security proof of long-distance continuous-variable quantum key distribution with discrete modulation
• Testing Quantum Devices: Practical Entanglement Verification in Bipartite Optical Systems
• Memory for Light as a Quantum Process
• Squeezing the limit: Quantum benchmarks for the teleportation and storage of squeezed states
• Quantum Benchmark for Teleportation and Storage of Squeezed States
• Phase-Covariant Quantum Benchmarks
• Fidelity criterion for quantum-domain transmission and storage of coherent states beyond unit-gain constraint
• Verification of quantum-domain process using two non-orthogonal states
• Probing the quantumness of channels with mixed states

Cited by in corpus (21)

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• Universal and Operational Benchmarking of Quantum Memories
• Certifying quantumness: Benchmarks for the optimal processing of generalized coherent and squeezed states
• Optimal working points for continuous-variable quantum channels
• Quantumness of Gaussian Discord: Experimental Evidence and Role of System-Environment Correlations
• Strong quantitative benchmarking of quantum optical devices
• Entanglement verification with detection-efficiency mismatch
• Quantum benchmarking with realistic states of light
• Quantum teleportation benchmarks for independent and identically-distributed spin states and displaced thermal states
• Fundamental quantum limits for practical devices
• Simple proof of the quantum benchmark fidelity for continuous-variable quantum devices
• Quantum-optical channels that output only classical states
• Test one to test many: a unified approach to quantum benchmarks
• Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication
• Schmidt-number benchmark for genuine quantum memories and gates
• Quantum Benchmark via an Uncertainty Product of Canonical Variables
• Composability of partially entanglement breaking channels via entanglement assisted local operations and classical communication
• Einstein-Podolsky-Rosen-like correlation on a coherent-state basis and inseparability of two-mode Gaussian states
• Robust Gaussian Teleportation with Attenuations and Non-unity Gain
• Quantum Minimax Theorem