Generation Engineering of Heralded Narrowband Colour Entangled States
arXiv:1809.03456 · doi:10.1103/PhysRevA.99.031802
Abstract
Efficient heralded generation of entanglement together with its manipulation is of great importance for quantum communications. In addition, states generated with bandwidths naturally compatible with atomic transitions allow a more efficient mapping of light into matter which is an essential requirement for long distance quantum communications. Here we propose a scheme where the indistinguishability between two spontaneous four-wave mixing processes is engineered to herald generation of single-photon frequency-bin entangled states, i.e., single-photons shared by two distinct frequency modes. We show that entanglement can be optimised together with the generation probability, while maintaining absorption negligible. Besides, the scheme illustrated for cold rubidium atoms is versatile and can be implemented in several other physical systems.
References in corpus (24)
- Separability of Mixed States: Necessary and Sufficient Conditions
- Long-distance quantum communication with atomic ensembles and linear optics
- The nitrogen-vacancy colour centre in diamond
- Theory of ultracold Fermi gases
- Violation of Bell's inequality under strict Einstein locality conditions
- Measurement-Induced Entanglement for Excitation Stored in Remote Atomic Ensembles
- Mapping photonic entanglement into and out of a quantum memory
- Wavelength-Multiplexed Quantum Networks with Ultrafast Frequency Combs
- Entanglement-based wavelength multiplexed quantum communication network
- Average Entropy of a Subsystem
- Partial Teleportation of Entanglement in the Noisy Environment
- Narrow-Band Biphoton Generation near Atomic Resonance
- Narrow Band Source of Transform-Limited Photon Pairs via Four-Wave Mixing in a Cold Atomic Ensemble
- Subnatural-linewidth biphotons from a Doppler-broadened hot atomic vapor cell
- Tomography of a High-Purity Narrowband Photon From a Transient Atomic Collective Excitation
- Laser-cooled atoms inside a hollow-core photonic-crystal fiber
- Subnatural-Linewidth Polarization-Entangled Photon Pairs with Controllable Temporal Length
- Witnessing trustworthy single-photon entanglement with local homodyne measurements
- Remote preparation of arbitrary time-encoded single-photon ebits
- Electromagnetically-induced transparency and light storing of a pair of pulses
- Fabrication method for micro vapor cells for alkali atoms
- Purification of Single-photon Entanglement
- Revealing Genuine Optical-Path Entanglement
- Two-color quantum memory in double Λ-media