Phase noise measurements in long fiber interferometers for quantum repeaters applications

Abstract

Many protocols for long distance quantum communication require interferometric phase stability over long distances of optical fibers. In this paper we investigate the phase noise in long optical fibers both in laboratory environment and in installed commercial fibers in an urban environment over short time scales (up to hundreds of us). We show that the phase fluctuations during the travel time of optical pulses in long fiber loops are small enough to obtain high visibility first order interference fringes in a Sagnac interferometer configuration for fiber lengths up to 75 km. We also measure phase fluctuations in a Mach-Zehnder interferometer in installed fibers with arm length 36.5 km. We verify that the phase noise respects gaussian distribution and measure the mean phase change as a function of time difference. The typical time needed for a mean phase change of 0.1 rad is of order of 100 us, which provides information about the time scale available for active phase stabilization. Our results are relevant for future implementations of quantum repeaters in installed optical fiber networks.

9 pages with 10 figures

References in corpus (16)

• Long-distance quantum communication with atomic ensembles and linear optics
• Creation of entangled states of distant atoms by interference
• Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
• Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
• Proposal for teleportation of an atomic state via cavity decay
• Efficient engineering of multi-atom entanglement through single-photon detections
• Functional Quantum Nodes for Entanglement Distribution over Scalable Quantum Networks
• Fault-tolerant Quantum Communication with Minimal Physical Requirements
• Robust long-distance entanglement and a loophole-free Bell test with ions and photons
• Heralded Entanglement between Atomic Ensembles: Preparation, Decoherence, and Scaling
• Multiplexed Memory-Insensitive Quantum Repeaters
• Fault-tolerant quantum repeaters with minimal physical resources, and implementations based on single photon emitters
• Long-Distance Entanglement Distribution with Single-Photon Sources
• Coherent optical phase transfer over a 32-km fiber with 1-s instability at $10^{-17}$
• A fast and robust approach to long-distance quantum communication with atomic ensembles
• Fault-tolerant quantum repeater with atomic ensembles and linear optics

Cited by in corpus (46)

• Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
• Deterministic delivery of remote entanglement on a quantum network
• Entanglement of two quantum memories via fibers over dozens of kilometres
• Counterfactual Quantum Cryptography
• Droplet Epitaxy of Semiconductor Nanostructures for Quantum Photonic Devices
• Phase-Matching Quantum Key Distribution
• Deterministic polarization-entanglement purification using spatial entanglement
• Proof-of-principle experimental demonstration of twin-field type quantum key distribution
• An optomechanical Bell test
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• Photonic quantum state transfer between a cold atomic gas and a crystal
• Experimental Quantum Communication Enhancement by Superposing Trajectories
• Photonic spatial Bell-state analysis for robust quantum secure direct communication using quantum dot-cavity systems
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory
• Exploring Macroscopic Entanglement with a Single Photon and Coherent States
• Approaches for a quantum memory at telecommunication wavelengths
• Purification of Single-photon Entanglement
• Stable single-photon interference in a 1 km fiber-optical Mach-Zehnder interferometer with continuous phase adjustment
• Quantification of multidimensional entanglement stored in a crystal
• Multipartite electronic entanglement purification with charge detection
• Development of a Boston-area 50-km fiber quantum network testbed
• Remote Key Establishment by Mode Mixing in Multimode Fibres and Optical Reciprocity
• Purification of single-photon entanglement with linear optics
• Postselection-Loophole-Free Bell Test Over an Installed Optical Fiber Network
• Heralded distribution of single-photon path entanglement
• Quantum topology identification with deep neural networks and quantum walks
• Limits and prospects for long-baseline optical fiber interferometry
• Asynchronous Quantum Repeater using Multiple Quantum Memory
• Loophole-free Bell test for one atom and less than one photon
• Analyzing photon-count heralded entanglement generation between solid-state spin qubits by decomposing the master equation dynamics
• Scalable repeater architectures for multi-party states
• A universal, plug-and-play synchronisation scheme for practical quantum networks
• A Quantum Repeater Node with Trapped Ions: A Realistic Case Example
• Quantum repeaters free of polarization disturbance and phase noise
• Phase-locking an interferometer with single-photon detections
• Entanglement dynamics of photon pairs and quantum memories in the gravitational field of the earth
• Phase control of a longitudinal momentum entangled photon state by a deformable membrane mirror
• Local and scalable detection of genuine multipartite single-photon path entanglement
• Multiplexed quantum repeaters based on single-photon interference with mild stabilization
• Towards heralded distribution of polarization entanglement
• Quantum repeater using three-level atomic states in the presence of dissipation: stability of entanglement
• Deterministic quantum state transfer between remote atoms with photon-number superposition states
• Deterministic generation of high-dimensional entanglement between distant atomic memories via multi-photon exchange
• Quantum Diffie-Hellman key exchange
• Long-range, phase-and-polarization diversity coherent reflectometer
• Phase Diffusion of Light Immersed In Quantum Tides: Open Quantum System Approach