Adapting coherent-state superpositions in noisy channels

• URL: http://arxiv.org/abs/2406.01081v1
• Date: Mon, 3 Jun 2024 08:00:18 GMT
• Title: Adapting coherent-state superpositions in noisy channels
• Authors: Jan Provazník, Petr Marek, Julien Laurat, Radim Filip,
• Abstract summary: Quantum non-Gaussian states are crucial for the fundamental understanding of non-linear bosonic systems. We propose an optimal protection of superpositions of coherent states against a sequence of asymmetric thermal lossy channels by suitable squeezing operations.
• Score: 0.5999777817331317
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum non-Gaussian states are crucial for the fundamental understanding of non-linear bosonic systems and simultaneously advanced applications in quantum technologies. In many bosonic experiments the important quantum non-Gaussian feature is the negativity of the Wigner function, a cornerstone for quantum computation with bosons. Unfortunately, the negativities present in complex quantum states are extremely vulnerable to the effects of decoherence, such as energy loss, noise and dephasing, caused by the coupling to the environment, which is an unavoidable part of any experimental implementation. An efficient way to mitigate its effects is by adapting quantum states into more resilient forms. We propose an optimal protection of superpositions of coherent states against a sequence of asymmetric thermal lossy channels by suitable squeezing operations.

Related papers

• The multimode conditional quantum Entropy Power Inequality and the squashed entanglement of the extreme multimode bosonic Gaussian channels [53.253900735220796]
  Inequality determines the minimum conditional von Neumann entropy of the output of the most general linear mixing of bosonic quantum modes. Bosonic quantum systems constitute the mathematical model for the electromagnetic radiation in the quantum regime.
  arXiv  Detail & Related papers  (2024-10-18T13:59:50Z)
• Phase-space negativity as a computational resource for quantum kernel methods [2.5499055723658097]
  Quantum kernel methods are a proposal for achieving quantum computational advantage in machine learning. We provide sufficient conditions for the efficient classical estimation of quantum kernel functions for bosonic systems. Our results underpin the role of the negativity in phase-space quasi-probability distributions as an essential resource in quantum machine learning.
  arXiv  Detail & Related papers  (2024-05-20T21:18:53Z)
• Power Characterization of Noisy Quantum Kernels [52.47151453259434]
  We show that noise may make quantum kernel methods to only have poor prediction capability, even when the generalization error is small. We provide a crucial warning to employ noisy quantum kernel methods for quantum computation.
  arXiv  Detail & Related papers  (2024-01-31T01:02:16Z)
• Quantum error mitigation for Fourier moment computation [49.1574468325115]
  This paper focuses on the computation of Fourier moments within the context of a nuclear effective field theory on superconducting quantum hardware. The study integrates echo verification and noise renormalization into Hadamard tests using control reversal gates. The analysis, conducted using noise models, reveals a significant reduction in noise strength by two orders of magnitude.
  arXiv  Detail & Related papers  (2024-01-23T19:10:24Z)
• Entanglement cost of realizing quantum processes [5.086696108576776]
  We develop an efficiently computable tool that reliably estimates the amount of entanglement needed for realizing arbitrary quantum processes. Our tool applies to the entanglement required to prepare a broad range of quantum states in the regime, surpassing previous methods' limitations.
  arXiv  Detail & Related papers  (2023-11-17T17:07:26Z)
• Critical sensing with a single bosonic mode without boson-boson interactions [3.8795402651871984]
  We propose a simple critical quantum sensing scheme that requires neither of these conditions. The scheme can be realized in different systems, e.g., ion traps and superconducting circuits.
  arXiv  Detail & Related papers  (2023-05-28T07:45:34Z)
• Harnessing quantumness of states using discrete Wigner functions under (non)-Markovian quantum channels [0.0]
  The study of Wigner negativity and its evolution under different quantum channels can provide insight into the stability and robustness of quantum states. We construct different negative quantum states which can be used as a resource for quantum computation and quantum teleportation.
  arXiv  Detail & Related papers  (2023-03-09T14:41:38Z)
• Protecting the quantum interference of cat states by phase-space compression [45.82374977939355]
  Cat states with their unique phase-space interference properties are ideal candidates for understanding quantum mechanics. They are highly susceptible to photon loss, which inevitably diminishes their quantum non-Gaussian features. Here, we protect these non-Gaussian features by compressing the phase-space distribution of a cat state.
  arXiv  Detail & Related papers  (2022-12-02T16:06:40Z)
• The power of noisy quantum states and the advantage of resource dilution [62.997667081978825]
  Entanglement distillation allows to convert noisy quantum states into singlets. We show that entanglement dilution can increase the resilience of shared quantum states to local noise.
  arXiv  Detail & Related papers  (2022-10-25T17:39:29Z)
• Quantum non-Gaussianity of multi-phonon states of a single atom [0.7381551917607596]
  We derive the most challenging hierarchy of quantum non-Gaussian criteria for the individual mechanical Fock states. We analyze the depth of quantum non-Gaussian features under mechanical heating and predict their application in quantum sensing.
  arXiv  Detail & Related papers  (2021-11-19T09:58:22Z)
• Direct Quantum Communications in the Presence of Realistic Noisy Entanglement [69.25543534545538]
  We propose a novel quantum communication scheme relying on realistic noisy pre-shared entanglement. Our performance analysis shows that the proposed scheme offers competitive QBER, yield, and goodput.
  arXiv  Detail & Related papers  (2020-12-22T13:06:12Z)

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.