Towards the device-independent certification of a quantum memory

• URL: http://arxiv.org/abs/2304.10408v2
• Date: Tue, 25 Apr 2023 12:22:56 GMT
• Title: Towards the device-independent certification of a quantum memory
• Authors: Pavel Sekatski, Jean-Daniel Bancal, Marie Ioannou, Mikael Afzelius, Nicolas Brunner
• Abstract summary: We develop efficient certification methods for quantum memories. Considering a device-independent approach, we develop a robust self-testing method for quantum memories. More generally, our methods apply for the characterisation of any device implementing a qubit identity quantum channel.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum memories represent one of the main ingredients of future quantum communication networks. Their certification is therefore a key challenge. Here we develop efficient certification methods for quantum memories. Considering a device-independent approach, where no a priori characterisation of sources or measurement devices is required, we develop a robust self-testing method for quantum memories. We then illustrate the practical relevance of our technique in a relaxed scenario by certifying a fidelity of 0.87 in a recent solid-state ensemble quantum memory experiment. More generally, our methods apply for the characterisation of any device implementing a qubit identity quantum channel.

Related papers

• Self-testing memory-bounded quantum computers [0.1874930567916036]
  In a single-device setup, we propose a protocol called quantum system quizzing. This protocol achieves self-testing of an entire quantum model given by state preparation, gates, and measurement in a black-box scenario. We identify sets of instructions which self-test multi-qubit universal gate sets for arbitrary numbers of qubits, delivering the first sound certification tool for memory-bounded quantum computers.
  arXiv  Detail & Related papers  (2024-11-06T19:23:45Z)
• On-Chip Verified Quantum Computation with an Ion-Trap Quantum Processing Unit [0.5497663232622965]
  We present and experimentally demonstrate a novel approach to verification and benchmarking of quantum computing. Unlike previous information-theoretically secure verification protocols, our approach is implemented entirely on-chip. Our results pave the way for more accessible and efficient verification and benchmarking strategies in near-term quantum devices.
  arXiv  Detail & Related papers  (2024-10-31T16:54:41Z)
• The curse of random quantum data [62.24825255497622]
  We quantify the performances of quantum machine learning in the landscape of quantum data. We find that the training efficiency and generalization capabilities in quantum machine learning will be exponentially suppressed with the increase in qubits. Our findings apply to both the quantum kernel method and the large-width limit of quantum neural networks.
  arXiv  Detail & Related papers  (2024-08-19T12:18:07Z)
• Guarantees on the structure of experimental quantum networks [105.13377158844727]
  Quantum networks connect and supply a large number of nodes with multi-party quantum resources for secure communication, networked quantum computing and distributed sensing. As these networks grow in size, certification tools will be required to answer questions regarding their properties. We demonstrate a general method to guarantee that certain correlations cannot be generated in a given quantum network.
  arXiv  Detail & Related papers  (2024-03-04T19:00:00Z)
• Classical certification of quantum gates under the dimension assumption [0.1874930567916036]
  We develop an efficient method for certifying single-qubit quantum gates in a black-box scenario. We prove that the method's sample complexity grows as $mathrmO(varepsilon-1)$. We show that the proposed method can be used to certify a gate set universal for single-qubit quantum computation.
  arXiv  Detail & Related papers  (2024-01-30T13:40:39Z)
• Anticipative measurements in hybrid quantum-classical computation [68.8204255655161]
  We present an approach where the quantum computation is supplemented by a classical result. Taking advantage of its anticipation also leads to a new type of quantum measurements, which we call anticipative. In an anticipative quantum measurement the combination of the results from classical and quantum computations happens only in the end.
  arXiv  Detail & Related papers  (2022-09-12T15:47:44Z)
• Interactive Protocols for Classically-Verifiable Quantum Advantage [46.093185827838035]
  "Interactions" between a prover and a verifier can bridge the gap between verifiability and implementation. We demonstrate the first implementation of an interactive quantum advantage protocol, using an ion trap quantum computer.
  arXiv  Detail & Related papers  (2021-12-09T19:00:00Z)
• Sample-efficient device-independent quantum state verification and certification [68.8204255655161]
  Authentication of quantum sources is a crucial task in building reliable and efficient protocols for quantum-information processing. We develop a systematic approach to device-independent verification of quantum states free of IID assumptions in the finite copy regime. We show that device-independent verification can be performed with optimal sample efficiency.
  arXiv  Detail & Related papers  (2021-05-12T17:48:04Z)
• Nearest Centroid Classification on a Trapped Ion Quantum Computer [57.5195654107363]
  We design a quantum Nearest Centroid classifier, using techniques for efficiently loading classical data into quantum states and performing distance estimations. We experimentally demonstrate it on a 11-qubit trapped-ion quantum machine, matching the accuracy of classical nearest centroid classifiers for the MNIST handwritten digits dataset and achieving up to 100% accuracy for 8-dimensional synthetic data.
  arXiv  Detail & Related papers  (2020-12-08T01:10:30Z)
• Theory of quantum system certification: a tutorial [1.583842747998493]
  This tutorial explains prominent protocols for certifying the physical layer of quantum devices. We discuss methods of direct quantum state certification, direct fidelity estimation, shadow fidelity estimation, direct quantum process certification, randomized benchmarking and cross-entropy benchmarking.
  arXiv  Detail & Related papers  (2020-10-12T18:00:04Z)
• Self-testing of a single quantum device under computational assumptions [7.716156977428555]
  Self-testing is a method to characterise an arbitrary quantum system based only on its classical input-output correlations. We replace the setting of multiple non-communicating parties, which is difficult to enforce in practice, by a single computationally bounded party.
  arXiv  Detail & Related papers  (2020-01-24T19:00:15Z)

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.