Generation of perfect-cavity-enhanced atom-photon entanglement with a millisecond lifetime via a spatially-multiplexed cavity

• URL: http://arxiv.org/abs/2110.10971v1
• Date: Thu, 21 Oct 2021 08:33:52 GMT
• Title: Generation of perfect-cavity-enhanced atom-photon entanglement with a millisecond lifetime via a spatially-multiplexed cavity
• Authors: Minjie Wang, Shengzhi Wang, Tengfei Ma, Ya Li, Yan Xie, Haole Jiao, Hailong Liu, Shujing Li, Hai Wang
• Abstract summary: We create a qubit entangled with a magnetic-field-insensitive spin-wave qubit by applying a single-mode write-laser beam to cold atoms. Experiment demonstrates 50% intrinsic retrieval efficiency for 540 microsecond storage time.
• Score: 15.370246815318884
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: A qubit memory is the building block for quantum information. Cavity-enhanced spin-wave-photon entanglement has been achieved by applying dual-control modes. However, owing to cross readouts between the modes, the qubit retrieval efficiency is about one quarter lower than that for a single spin-wave mode at all storage times. Here, we overcome cross readouts using a multiplexed ring cavity. The cavity is embedded with a polarization interferometer, and we create a write-out photonic qubit entangled with a magnetic-field-insensitive spin-wave qubit by applying a single-mode write-laser beam to cold atoms. The spin-wave qubit is retrieved with a single-mode read-laser beam, and the quarter retrieval-efficiency loss is avoided at all storage times. Our experiment demonstrates 50% intrinsic retrieval efficiency for 540 microsecond storage time, which is 13.5 times longer than the best reported result. Importantly, our multiplexed-cavity scheme paves one road to generate perfect-cavity-enhanced and large-scale multiplexed spin-wave-photon entanglement with a long lifetime.

Related papers

• Cavity-enhanced and spatial-multimode spin-wave-photon quantum interface [2.802516123527007]
  We set up a ring cavity that supports an array including 6 TEM00 modes and then demonstrated cavity enhanced and spatially multiplexed spin wave photon quantum interface (QI) The average intrinsic retrieval efficiency reaches 70% at zero delay. The storage time for the case that cross-correlation function of the multiplexed QI is beyond 2 reaches 0.6ms.
  arXiv  Detail & Related papers  (2023-07-24T04:36:40Z)
• Efficient cavity-assisted storage of photonic qubits in a solid-state quantum memory [55.41644538483948]
  We report on the high-efficiency storage and retrieval of weak coherent optical pulses and photonic qubits in a cavity solid-state quantum memory. We store weak coherent pulses at the single photon level with up to 62% efficiency for a pre-determined storage time of 2 $mu$s. We then store weak coherent time-bin qubits with (51+-2)% efficiency and a measurement-device limited fidelity over (94.8+-1.4)% for the retrieved qubits.
  arXiv  Detail & Related papers  (2023-07-07T10:55:09Z)
• Qubit readouts enabled by qubit cloaking [49.1574468325115]
  Time-dependent drives play a crucial role in quantum computing efforts. They enable single-qubit control, entangling logical operations, as well as qubit readout. Qubit cloaking was introduced in Lled'o, Dassonneville, et al.
  arXiv  Detail & Related papers  (2023-05-01T15:58:25Z)
• Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
  We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
  arXiv  Detail & Related papers  (2022-10-18T09:55:58Z)
• Generation of highly retrievable atom photon entanglement with a millisecond lifetime via a spatially multiplexed cavity [15.370246815318884]
  Cavity enhanced and long lived spin wave photon entanglement has been demonstrated by applying dual laser beams onto optical-lattice atoms. Here, by coupling cold atoms to two modes of a polarization interferometer based cavity, we achieve perfect qubit retrieval in cavity enhanced and long lived atom photon entanglement. Our experiment demonstrates 540mus storage time at 50% intrinsic qubit retrieval efficiency, which is 13.5 times longer than the best reported result.
  arXiv  Detail & Related papers  (2022-04-12T13:29:51Z)
• Five-second coherence of a single spin with single-shot readout in silicon carbide [84.97423065534817]
  We demonstrate single-shot readout of single defects in silicon carbide (SiC) We achieve over 80% readout fidelity without pre- or post-selection. We report single spin T2 > 5s, over two orders of magnitude greater than previously reported in this system.
  arXiv  Detail & Related papers  (2021-10-04T17:35:02Z)
• Storage of photonic time-bin qubits for up to 20 ms in a rare-earth doped crystal [0.0]
  Long-duration quantum memories for photonic qubits are essential components for achieving long-distance quantum networks and repeaters. In this work, we apply dynamical decoupling techniques and a small magnetic field to achieve the storage of six temporal modes for 20, 50 and 100 ms in a crystal. The quantum coherence of the memory is verified by storing two time-bin qubits for 20 ms, with an average memory output fidelity of $F=(85pm 2)%$ for an average number of photons per qubit of $mu_textin$ = 0.92$pm$0.04
  arXiv  Detail & Related papers  (2021-09-14T13:18:00Z)
• Entanglement between a telecom photon and an on-demand multimode solid-state quantum memory [52.77024349608834]
  We show the first demonstration of entanglement between a telecom photon and a collective spin excitation in a multimode solid-state quantum memory. We extend the entanglement storage in the quantum memory for up to 47.7$mu$s, which could allow for the distribution of entanglement between quantum nodes separated by distances of up to 10 km.
  arXiv  Detail & Related papers  (2021-06-09T13:59:26Z)
• Efficient quantum memory for heralded single photons generated by cavity-enhanced spontaneous parametric downconversion [0.0]
  We interface a spontaneous parametric down conversion (SPDC) crystal and a cold atomic ensemble. We demonstrate a highly efficient quantum memory through polarization-encoded single-photon qubits. The results pave the way toward large-scale quantum network.
  arXiv  Detail & Related papers  (2020-11-30T16:19:39Z)
• A Frequency-Multiplexed Coherent Electro-Optic Memory in Rare Earth Doped Nanoparticles [94.37521840642141]
  Quantum memories for light are essential components in quantum technologies like long-distance quantum communication and distributed quantum computing. Recent studies have shown that long optical and spin coherence lifetimes can be observed in rare earth doped nanoparticles. We report on coherent light storage in Eu$3+$:Y$$O$_3$ nanoparticles using the Stark Echo Modulation Memory (SEMM) quantum protocol.
  arXiv  Detail & Related papers  (2020-06-17T13:25:54Z)
• A cold atom temporally multiplexed quantum memory with cavity-enhanced noise suppression [0.0]
  We demonstrate a temporally multiplexed quantum repeater node in a laser-cooled cloud of $87$Rb atoms. By embedding the atomic ensemble inside a low finesse optical cavity, the additional noise generated in multi-mode operation is strongly suppressed. The reported capability is a key element of a quantum repeater architecture based on multiplexed quantum memories.
  arXiv  Detail & Related papers  (2020-03-18T18:13:40Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.