Proposal for non-cryogenic quantum repeaters with hot hybrid alkali-noble gases

• URL: http://arxiv.org/abs/2210.09504v1
• Date: Tue, 18 Oct 2022 00:53:31 GMT
• Title: Proposal for non-cryogenic quantum repeaters with hot hybrid alkali-noble gases
• Authors: Jia-Wei Ji, Faezeh Kimiaee Asadi, Khabat Heshami, and Christoph Simon
• Abstract summary: We propose a quantum repeater architecture that can operate without cryogenics. Each node builds on a cell of hot alkali atoms and noble-gas spins which offer a storage time as long as a few hours. We quantify the performance of this proposed repeater architecture in terms of repeater rates and overall entanglement fidelities.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We propose a quantum repeater architecture that can operate without cryogenics. Each node in our architecture builds on a cell of hot alkali atoms and noble-gas spins which offer a storage time as long as a few hours. Such a cell of hybrid gases is placed in a ring cavity, which allows us to suppress the detrimental four-wave mixing (FWM) noise in the system. We investigate the protocol based on a single-photon source made of an ensemble of the same hot alkali atoms. A single photon emitted from the source is either stored in the memory or transmitted to the central station to be detected. We quantify the fidelity and success probability of generating entanglement between two remote ensembles of noble-gas spins by taking into account finite memory efficiency, channel loss, and dark counts in detectors. We describe how the entanglement can be extended to long distances via entanglement swapping operations by retrieving the stored signal. Moreover, we quantify the performance of this proposed repeater architecture in terms of repeater rates and overall entanglement fidelities and compare it to another recently proposed non-cryogenic quantum repeater architecture based on nitrogen-vacancy (NV) centers and optomechanical spin-photon interfaces. As the system requires a relatively simple setup, it is much easier to perform multiplexing, which enables achieving rates comparable to the rates of repeaters with NV centers and optomechanics, while the overall entanglement fidelities of the present scheme are higher than the fidelities of the previous scheme. Our work shows that a scalable long-distance quantum network made of hot hybrid atomic gases is within reach of current technological capabilities.

Related papers

• Efficient nuclear spin - photon entanglement with optical routing [0.0]
  Quantum networks and distributed quantum computers rely on entanglement generation between photons and long-lived quantum memories. Here, we maximize the efficiency for the detection of hybrid entanglement between a nuclear spin qubit in diamond with a photonic time-bin qubit. Our results thus pave the way for the future high-performance quantum networks.
  arXiv  Detail & Related papers  (2024-08-03T17:01:03Z)
• Multiplexed quantum repeaters with hot multimode alkali-noble gas memories [45.49722819849123]
  We propose a non-cryogenic optical quantum memory for noble-gas nuclear spins based on the Atomic Frequency Comb protocol. We discuss how these quantum memories can enhance rates in satellite quantum communication networks.
  arXiv  Detail & Related papers  (2024-02-27T18:39:15Z)
• Neutron-nucleus dynamics simulations for quantum computers [49.369935809497214]
  We develop a novel quantum algorithm for neutron-nucleus simulations with general potentials. It provides acceptable bound-state energies even in the presence of noise, through the noise-resilient training method. We introduce a new commutativity scheme called distance-grouped commutativity (DGC) and compare its performance with the well-known qubit-commutativity scheme.
  arXiv  Detail & Related papers  (2024-02-22T16:33:48Z)
• High-rate sub-GHz linewidth bichromatic entanglement source for quantum networking [59.191830955730346]
  In this work, we study an entanglement source based on four-wave mixing in a diamond configuration in a warm rubidium vapor. We are able to achieve in-fiber entangled pair generation rates greater than $107, /s$, orders of magnitude higher than previously reported atomic sources.
  arXiv  Detail & Related papers  (2023-04-11T21:19:30Z)
• Simulation of Entanglement Generation between Absorptive Quantum Memories [56.24769206561207]
  We use the open-source Simulator of QUantum Network Communication (SeQUeNCe), developed by our team, to simulate entanglement generation between two atomic frequency comb (AFC) absorptive quantum memories. We realize the representation of photonic quantum states within truncated Fock spaces in SeQUeNCe. We observe varying fidelity with SPDC source mean photon number, and varying entanglement generation rate with both mean photon number and memory mode number.
  arXiv  Detail & Related papers  (2022-12-17T05:51:17Z)
• Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics [0.27488316163114823]
  quantum repeater architecture that can operate under ambient conditions. Non-cryogenic spin-photon interfaces based on nitrogen-vacancy centers have excellent spin coherence times even at room temperature. optomechanics allows to avoid phonon-related decoherence and also allows the emitted photons to be in the telecom band.
  arXiv  Detail & Related papers  (2022-03-13T09:50:27Z)
• Pulsed multireservoir engineering for a trapped ion with applications to state synthesis and quantum Otto cycles [68.8204255655161]
  Reservoir engineering is a remarkable task that takes dissipation and decoherence as tools rather than impediments. We develop a collisional model to implement reservoir engineering for the one-dimensional harmonic motion of a trapped ion. Having multiple internal levels, we show that multiple reservoirs can be engineered, allowing for more efficient synthesis of well-known non-classical states of motion.
  arXiv  Detail & Related papers  (2021-11-26T08:32:39Z)
• Robust quantum-network memory based on spin qubits in isotopically engineered diamond [0.0]
  We show that a single 13C spin in isotopically engineered diamond offers a long-lived quantum memory that is robust to the optical link operation of an NV centre. Our results pave the way for test-bed quantum networks capable of investigating complex algorithms and error correction.
  arXiv  Detail & Related papers  (2021-11-18T16:13:45Z)
• Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register [48.7576911714538]
  Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. We propose the generation of multi-dimensional lattice cluster states using a single, efficient spin-photon interface coupled strongly to a nuclear register.
  arXiv  Detail & Related papers  (2021-04-26T14:41:01Z)
• Proposal for room-temperature quantum repeaters with nitrogen-vacancy centers and optomechanics [0.0]
  quantum repeater architecture that can operate under ambient conditions. Non-cryogenic spin-photon interfaces based on nitrogen-vacancy centers have excellent spin coherence times even at room temperature. optomechanics allows to avoid phonon-related decoherence and also allows the emitted photons to be in the telecom band.
  arXiv  Detail & Related papers  (2020-12-12T00:41:00Z)

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.