Entanglement of light-shift compensated atomic spin waves with telecom light

Abstract

Entanglement of a 795 nm light polarization qubit and an atomic Rb spin wave qubit for a storage time of 0.1 s is observed by measuring the violation of Bell's inequality (S = 2.65 \pm 0.12). Long qubit storage times are achieved by pinning the spin wave in a 1064 nm wavelength optical lattice, with a magic-valued magnetic field superposed to eliminate lattice-induced dephasing. Four-wave mixing in a cold Rb gas is employed to perform light qubit conversion between near infra red (795 nm) and telecom (1367 nm) wavelengths, and after propagation in a telecom fiber, to invert the conversion process. Observed Bell inequality violation (S = 2.66 \pm 0.09), at 10 ms storage, confirms preservation of memory/light entanglement through the two stages of light qubit frequency conversion.

5 pages, 3 figures

References in corpus (14)

• Long-distance quantum communication with atomic ensembles and linear optics
• Bell inequality violation with two remote atomic qubits
• Quantum State Transfer Between Matter and Light
• Multiplexed Memory-Insensitive Quantum Repeaters
• Memory-built-in quantum teleportation with photonic and atomic qubits
• Entanglement of a photon and a collective atomic excitation
• Quantum telecommunication based on atomic cascade transitions
• Robust and Efficient Quantum Repeaters with Atomic Ensembles and Linear Optics
• Deterministic single photons via conditional quantum evolution
• A fast and robust approach to long-distance quantum communication with atomic ensembles
• A Robust Atom-Photon Entanglement Source for Quantum Repeaters
• Long-distance atom-photon entanglement
• Light storage in a magnetically-dressed optical lattice
• Efficiency of light-frequency conversion in an atomic ensemble

Cited by in corpus (53)

• Quantum repeaters: From quantum networks to the quantum internet
• Quantum memories: emerging applications and recent advances
• Coherence time of over a second in a telecom-compatible quantum memory storage material
• Prospective applications of optical quantum memories
• Entangling single atoms over 33 km telecom fibre
• Towards real-world quantum networks: a review
• An efficient quantum light-matter interface with sub-second lifetime
• Wide-band quantum interface for visible-to-telecommunication wavelength conversion
• High-fidelity entanglement between a trapped ion and a telecom photon via quantum frequency conversion
• Long-distance distribution of atom-photon entanglement at telecom wavelength
• Spectral compression of single photons
• Polarization insensitive frequency conversion for an atom-photon entanglement distribution via a telecom network
• Entanglement between a diamond spin qubit and a photonic time-bin qubit at telecom wavelength
• Long lifetime and high-fidelity quantum memory of photonic polarization qubit by lifting Zeeman degeneracy
• Hyperpolarizability and operational magic wavelength in an optical lattice clock
• Polarization-entanglement conserving frequency conversion of photons
• Long-distance single photon transmission from a trapped ion via quantum frequency conversion
• Single-photon-level optical storage in a solid-state spin-wave memory
• Quantum optical signal processing in diamond
• Coherence preservation of a single neutral atom qubit transferred between magic-intensity optical traps
• State-insensitive trapping of Rb atoms: linearly versus circularly polarized lights
• Cavity-Enhanced Atom-Photon Entanglement with Subsecond Lifetime
• Highly Retrievable Spinwave-Photon Entanglement Source
• Spatial multiplexing of atom-photon entanglement sources using feed-forward controls and switching networks
• High-fidelity conversion of photonic quantum information to telecommunication wavelength with superconducting single-photon detectors
• Quantum network of neutral atom clocks
• A low-noise frequency down-conversion to the telecommunication band for a quantum communication based on NV centers in diamond
• Non-classical correlations between a C-band telecom photon and a stored spin-wave
• Coherent spin-wave processor of stored optical pulses
• Polarization entangled photon-pair source based on quantum nonlinear photonics and interferometry
• Quantum storage of entangled photons at telecom wavelengths in a crystal
• Quantum optical frequency up-conversion for polarisation entangled qubits: towards interconnected quantum information devices
• Deterministic Time-Bin Entanglement between a Single Photon and an Atomic Ensemble
• Multiplexed spin-wave-photon entanglement source using temporal-multimode memories and feedforward-controlled readout
• Heralded single excitation of atomic ensemble via solid-state-based telecom photon detection
• Experimental realization of light with time separated correlations by rephasing amplified spontaneous emission
• A versatile source of polarisation entangled photons for quantum network applications
• Prospects for storage and retrieval of a quantum dot single photon in an ultracold ${}^{87}$Rb ensemble
• Mach-Zehnder interferometer using frequency-domain beamsplitter
• Entangling Quantum Memories via Heralded Photonic Bell Measurement
• A two-way photonic interface for linking Sr+ transition at 422 nm to the telecommunications C-band
• Non-classical two-photon interference between independent telecom light pulses converted by difference-frequency generation
• Storing a single photon as a spin wave entangled with a flying photon in telecomband
• Direct Observation of Broadband Nonclassical States in a Room-temperature Light-matter Interface
• Generation of highly retrievable atom photon entanglement with a millisecond lifetime via a spatially multiplexed cavity
• Resource-efficient frequency conversion for quantum networks via sequential four-wave mixing
• Observation of two output light pulses from a partial wavelength converter preserving phase of an input light at a single-photon level
• Noise suppression in a temporal-multimode quantum memory entangled with a photon via asymmetrical photon-collection channel
• Wavelength conversion for single-photon polarization qubits through continuous variable quantum teleportation
• Remote Quantum Networks based on Quantum Memories
• Generation of entanglement between a highly wave-packet-tunable photon and a spin-wave memory in cold atoms
• Orbital angular momentum photonic quantum interface
• Generation of perfect-cavity-enhanced atom-photon entanglement with a millisecond lifetime via a spatially-multiplexed cavity