Resource-efficient and loss-aware photonic graph state preparation using an array of quantum emitters, and application to all-photonic quantum repeaters

• URL: http://arxiv.org/abs/2402.00731v1
• Date: Thu, 1 Feb 2024 16:29:07 GMT
• Title: Resource-efficient and loss-aware photonic graph state preparation using an array of quantum emitters, and application to all-photonic quantum repeaters
• Authors: Eneet Kaur, Ashlesha Patil, Saikat Guha
• Abstract summary: We propose an algorithm that can trade the number of emitters with the graph-state depth, while minimizing the number of emitter CNOTs. We find that our scheme achieves a far superior rate-vs.-distance performance than using the least number of emitters needed to generate the repeater graph state.
• Score: 0.8409980020848168
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Multi-qubit photonic graph states are necessary for quantum communication and computation. Preparing photonic graph states using probabilistic stitching of single photons using linear optics results in a formidable resource requirement due to the need of multiplexing. Quantum emitters present a viable solution to prepare photonic graph states, as they enable controlled production of photons entangled with the emitter qubit, and deterministic two-qubit interactions among emitters. A handful of emitters often suffice to generate useful photonic graph states that would otherwise require millions of single photon sources using the linear-optics method. But, photon loss poses an impediment to this method due to the large depth, i.e., age of the oldest photon, of the graph state, given the typically large number of slow and noisy two-qubit CNOT gates required on emitters. We propose an algorithm that can trade the number of emitters with the graph-state depth, while minimizing the number of emitter CNOTs. We apply our algorithm to generating a repeater graph state (RGS) for all-photonic repeaters. We find that our scheme achieves a far superior rate-vs.-distance performance than using the least number of emitters needed to generate the RGS. Yet, our scheme is able to get the same performance as the linear-optics method of generating the RGS where each emitter is used as a single-photon source, but with orders of magnitude fewer emitters.

Related papers

• Passive photonic CZ gate with two-level emitters in chiral multi-mode waveguide QED [41.94295877935867]
  We design a passive conditional gate between co-propagating photons using an array of only two-level emitters. The key resource is to harness the effective photon-photon interaction induced by the chiral coupling of the emitter array to two waveguide modes. We show how to harness this non-linear phase shift to engineer a conditional, deterministic photonic gate in different qubit encodings.
  arXiv  Detail & Related papers  (2024-07-08T18:00:25Z)
• A complete scheme for atom-mediated deterministic photonic graph state generation [0.0]
  Highly-entangled multi-photon graph states are a crucial resource in photonic quantum computation and communication. We show how harnessing single-atom-based photonic operations can enable deterministic generation of photonic graph states.
  arXiv  Detail & Related papers  (2024-06-02T20:33:40Z)
• Heralded photonic graph states with inefficient quantum emitters [2.612403257963011]
  Quantum emitter-based schemes for the generation of photonic graph states offer a promising, resource efficient methodology. We present a heralded scheme for making photonic graph states that is compatible with the typically poor photon collection from state-of-the-art emitters.
  arXiv  Detail & Related papers  (2024-05-22T00:24:01Z)
• Efficient qudit based scheme for photonic quantum computing [0.0]
  This work investigates qudits defined by the possible photon number states of a single photon in d > 2 optical modes. We demonstrate how to construct locally optimal non-deterministic many-qudit gates using linear optics and photon number resolving detectors. We find that the qudit cluster states require less optical modes and are encoded by a fewer number of entangled photons than the qubit cluster states with similar computational capabilities.
  arXiv  Detail & Related papers  (2023-02-14T21:41:45Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• Near-deterministic hybrid generation of arbitrary photonic graph states using a single quantum emitter and linear optics [0.0]
  We introduce near-deterministic solutions for the generation of graph states using the current quantum emitter capabilities. Our results should pave the way towards the practical implementation of resource-efficient quantum information processing.
  arXiv  Detail & Related papers  (2022-05-19T17:59:59Z)
• All-optical graph representation learning using integrated diffractive photonic computing units [51.15389025760809]
  Photonic neural networks perform brain-inspired computations using photons instead of electrons. We propose an all-optical graph representation learning architecture, termed diffractive graph neural network (DGNN) We demonstrate the use of DGNN extracted features for node and graph-level classification tasks with benchmark databases and achieve superior performance.
  arXiv  Detail & Related papers  (2022-04-23T02:29:48Z)
• Photonic resource state generation from a minimal number of quantum emitters [0.0]
  Multi-photon entangled graph states are a fundamental resource in quantum communication networks, distributed quantum computing, and sensing. Here, we present an algorithm that, given a desired multi-photon graph state, determines the minimum number of quantum emitters and precise operation sequences that can produce it.
  arXiv  Detail & Related papers  (2021-08-27T19:16:56Z)
• Rapid characterisation of linear-optical networks via PhaseLift [51.03305009278831]
  Integrated photonics offers great phase-stability and can rely on the large scale manufacturability provided by the semiconductor industry. New devices, based on such optical circuits, hold the promise of faster and energy-efficient computations in machine learning applications. We present a novel technique to reconstruct the transfer matrix of linear optical networks.
  arXiv  Detail & Related papers  (2020-10-01T16:04:22Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)

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.