Corpus ID: 118189874

Quantum interface between frequency-uncorrelated down-converted entanglement and atomic-ensemble quantum memory

  title={Quantum interface between frequency-uncorrelated down-converted entanglement and atomic-ensemble quantum memory},
  author={Xian-min Jin and Jian Yang and Han Zhang and Han-Ning Dai and Sheng-Jun Yang and Tianming Zhao and Jun Rui and Yu-ming He and Xiao Jiang and Fan Yang and Ge-Sheng Pan and Zhen-Sheng Yuan and Youjin Deng and Zeng-Bing Chen and Xiao-Hui Bao and Bo Zhao and Shuai Chen and Jian-Wei Pan},
  journal={arXiv: Quantum Physics},
Photonic entanglement source and quantum memory are two basic building blocks of linear-optical quantum computation and long-distance quantum communication. In the past decades, intensive researches have been carried out, and remarkable progress, particularly based on the spontaneous parametric down-converted (SPDC) entanglement source and atomic ensembles, has been achieved. Currently, an important task towards scalable quantum information processing (QIP) is to efficiently write and read… Expand
6 Citations
Broadband waveguide quantum memory for entangled photons
The authors' broadband quantum memory complements the family of robust, integrated lithium niobate devices and simplifies frequency-matching of light with matter interfaces in advanced applications of quantum communication, bringing fully quantum-enabled networks a step closer. Expand
Quantum storage of photonic entanglement in a crystal
The demonstration of entanglement between a photon at a telecommunication wavelength and a single collective atomic excitation stored in a crystal is reported, paving the way for building multiplexed quantum repeaters for long-distance quantum networks. Expand
A single-atom quantum memory
The most fundamental implementation of such a quantum memory is demonstrated, by mapping arbitrary polarization states of light into and out of a single atom trapped inside an optical cavity, which makes the system a versatile quantum node with excellent prospects for applications in optical quantum gates and quantum repeaters. Expand
Free-Space and Atmospheric Quantum Communications
The quantum internet with free-space and atmospheric quantum channels is becoming a reality [1, 2]. Emerging from the early ideas of Feynman and his colleagues [3], quantum information science (QIS)Expand
Photon-echo quantum memory with complete use of natural inhomogeneous broadening
The photon-echo quantum memory is based on a controlled rephasing of the atomic coherence excited by a signal light field in the inhomogeneously broadened resonant line. Here, we demonstrate anExpand
Unconditional room-temperature quantum memory
Optical quantum memories—storage devices for the data encoded in light pulses—will be vital for buffering the flow of quantum information. Researchers now demonstrate such a device that can operateExpand


Mapping photonic entanglement into and out of a quantum memory
A protocol where entanglement between two atomic ensembles is created by coherent mapping of an entangled state of light by splitting a single photon and performing subsequent state transfer, which will allow ‘on-demand’Entanglement of atomic en assembles, a powerful resource for quantum information science. Expand
Storage and retrieval of single photons transmitted between remote quantum memories
The generation, transmission, storage and retrieval of single quanta using two remote atomic ensembles is reported, an important step towards distributed quantum networks. Expand
Experimental demonstration of a BDCZ quantum repeater node
This work realizes entanglement swapping with storage and retrieval of light, a building block of the BDCZ quantum repeater, and establishes the essential element needed to realize quantum repeaters with stationary atomic qu bits as quantum memories and flying photonic qubits as quantum messengers. Expand
Demonstration of a stable atom-photon entanglement source for quantum repeaters.
A novel way to efficiently create a robust entanglement between an atomic and a photonic qubit is demonstrated and can serve as a building block for a novel robust quantum repeater architecture and can be extended to generate high-dimensional atom-photon entanglements. Expand
Experimental demonstration of quantum memory for light
Here a protocol for a high-fidelity transfer of an independently prepared quantum state of light onto an atomic quantum state based on atomic ensembles is proposed and experimentally demonstrated. Expand
Entangling independent photons by time measurement
Entanglement is at the heart of quantum physics, both for its conceptual foundations and for applications in quantum communication. Remarkably, entanglement can be ‘swapped’: if we prepare twoExpand
Generation of narrow-band polarization-entangled photon pairs for atomic quantum memories.
An experimental realization of a narrow band polarization-entangled photon source with a linewidth of 9.6 MHz through cavity-enhanced spontaneous parametric down-conversion with fidelity of 94% and coherence length directly measured to be 32 m. Expand
Long-lived quantum memory
Two independent experiments that demonstrate memories for single quantum excitations with storage times on the order of a millisecond—two orders of magnitude longer than reported so far—should helpExpand
Electromagnetically induced transparency with tunable single-photon pulses
This work demonstrates the use of EIT for the controllable generation, transmission and storage of single photons with tunable frequency, timing and bandwidth and probes the spectral and quantum statistical properties of narrow-bandwidth single-photon pulses, revealing that their quantum nature is preserved under EIT propagation and storage. Expand
Coherent optical pulse sequencer for quantum applications
This work presents a coherent optical memory based on photon echoes induced through controlled reversible inhomogeneous broadening that should enable the construction of an optical random-access memory for time-bin quantum information, and have potential applications in quantum information processing. Expand