Telecom Quantum Photonic Interface for a Ca Single-Ion Quantum Memory
arXiv:2211.08841 · doi:10.1038/s41534-023-00701-z
Abstract
Entanglement-based quantum networks require quantum photonic interfaces between stationary quantum memories and photons, enabling entanglement distribution. Here we present such a photonic interface, designed for connecting a Ca single-ion quantum memory to the telecom C-band. The interface combines a memory-resonant, cavity-enhanced spontaneous parametric down-conversion (SPDC) photon pair source with bi-directional polarization-conserving quantum frequency conversion (QFC). We demonstrate preservation of high-fidelity entanglement during conversion, fiber transmission over up to 40 km and back-conversion to the memory wavelength. Even for the longest distance and bi-directional conversion the entanglement fidelity remains larger than 95 % (98 %) without (with) background correction.
References in corpus (38)
- On the Measurement of Qubits
- Prescription for experimental determination of the dynamics of a quantum black box
- Quantum Repeaters with Photon Pair Sources and Multi-Mode Memories
- Broadband waveguide quantum memory for entangled photons
- Quantum state estimation
- A wavelength-tunable fiber-coupled source of narrowband entangled photons
- A Single-Atom Quantum Memory
- Phase-stable source of polarization-entangled photons using a polarization Sagnac interferometer
- A compact ion-trap quantum computing demonstrator
- Distributed Quantum Computation Based-on Small Quantum Registers
- Multi-parameter estimation in networked quantum sensors
- Telecom-heralded entanglement between remote multimode solid-state quantum memories
- Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
- Observation of measurement-induced quantum phases in a trapped-ion quantum computer
- Entangling single atoms over 33 km telecom fibre
- Entanglement of trapped-ion qubits separated by 230 meters
- High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion
- Ultranarrow-Band Photon Pair Source Compatible with Solid State Quantum Memories and Telecommunication Networks
- Long-distance distribution of atom-photon entanglement at telecom wavelength
- Light-matter entanglement over 50 km of optical fibre
- Generation of ultrabright tunable polarization entanglement without spatial, spectral, or temporal constraints
- Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
- A telecom-wavelength quantum repeater node based on a trapped-ion processor
- A Quantum Network Node with Crossed Optical Fibre Cavities
- Direct generation of genuine single-longitudinal-mode narrowband photon pairs
- Towards a deterministic interface between trapped-ion qubits and travelling photons
- A pulsed Sagnac source of narrowband polarization-entangled photons
- Robust Quantum Memory in a Trapped-Ion Quantum Network Node
- Polarization-entanglement conserving frequency conversion of photons
- Direct photonic coupling of a semiconductor quantum dot and a trapped ion
- Entangling metropolitan-distance separated quantum memories
- Efficient polarisation-preserving frequency conversion from a trapped-ion-compatible wavelength to the telecom C band
- Telecom-heralded single photon absorption by a single atom
- Single qubit manipulation in a microfabricated surface electrode ion trap
- Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices
- Programmable atom-photon quantum interface
- Coherence of a qubit stored in Zeeman levels of a single optically trapped atom
- Doubly-heralded single-photon absorption by a single atom
Cited by in corpus (5)
- Standalone mobile quantum memory system
- Full Bell-basis measurement of an atom-photon 2-qubit state and its application for quantum networks
- Quantum repeater node with free-space coupled trapped ions
- Designing a compact cavity-enhanced source of entangled photons
- Spin-photon Qubits for Scalable Quantum Network