Highly Retrievable Spinwave-Photon Entanglement Source
arXiv:1505.00405 · doi:10.1103/PhysRevLett.114.210501
Abstract
Entanglement between a single photon and a quantum memory forms the building blocks for quantum repeater and quantum network. Previous entanglement sources are typically with low retrieval efficiency, which limits future larger-scale applications. Here, we report a source of highly retrievable spinwave-photon entanglement. Polarization entanglement is created through interaction of a single photon with ensemble of atoms inside a low-finesse ring cavity. The cavity is engineered to be resonant for dual spinwave modes, which thus enables efficient retrieval of the spinwave qubit. An intrinsic retrieval efficiency up to 76(4)% has been observed. Such a highly retrievable atom-photon entanglement source will be very useful in future larger-scale quantum repeater and quantum network applications.
5 pages, 3 figures
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- Spatial multiplexing of atom-photon entanglement sources using feed-forward controls and switching networks
- Semi-Deterministic Entanglement between a Single Photon and an Atomic Ensemble
- Multiplexed spin-wave-photon entanglement source using temporal-multimode memories and feedforward-controlled readout
- Non-Hermitian magnon-photon interference in an atomic ensemble
- Simultaneous generation of two spin-wave-photon entangled states in an atomic ensemble
- Generation of highly retrievable atom photon entanglement with a millisecond lifetime via a spatially multiplexed cavity
- Noise suppression in a temporal-multimode quantum memory entangled with a photon via asymmetrical photon-collection channel
- Generation of entanglement between a highly wave-packet-tunable photon and a spin-wave memory in cold atoms
- Generation of perfect-cavity-enhanced atom-photon entanglement with a millisecond lifetime via a spatially-multiplexed cavity