Generation and structuring of multipartite entanglement in Josephson parametric system

• URL: http://arxiv.org/abs/2203.09247v2
• Date: Tue, 18 Apr 2023 12:54:37 GMT
• Title: Generation and structuring of multipartite entanglement in Josephson parametric system
• Authors: K. V. Petrovnin, M. R. Perelshtein, T. Korkalainen, V. Vesterinen, I. Lilja, G. S. Paraoanu, P. J. Hakonen
• Abstract summary: vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. We achieve generation of genuine tripartite entangled state and its control by the use of the phase difference between two continuous pump tones. Our scheme provides a comprehensive control toolbox for the entanglement structure and allows us to demonstrate, for first time to our knowledge, genuine quadripartite entanglement of microwave modes.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum correlations are a vital resource in advanced information processing based on quantum phenomena. Remarkably, the vacuum state of a quantum field may act as a key element for the generation of multipartite quantum entanglement. In this work, we achieve generation of genuine tripartite entangled state and its control by the use of the phase difference between two continuous pump tones. We demonstrate control of the subspaces of the covariance matrix for tripartite bisqueezed state. Furthermore, by optimizing the phase relationships in a three-tone pumping scheme we explore genuine quadripartite entanglement of a \textit{generalized} H-graph state ($\mathscr{\tilde{H}}$-graph). Our scheme provides a comprehensive control toolbox for the entanglement structure and allows us to demonstrate, for first time to our knowledge, genuine quadripartite entanglement of microwave modes. All experimental results are verified with numerical simulations of the nonlinear quantum Langevin equation. We envision that quantum resources facilitated by multi-pump configurations offer enhanced prospects for quantum data processing using parametric microwave cavities.

Related papers

• Simulating continuous-space systems with quantum-classical wave functions [0.0]
  Non-relativistic interacting quantum many-body systems are naturally described in terms of continuous-space Hamiltonians. Current algorithms require discretization, which usually amounts to choosing a finite basis set, inevitably introducing errors. We propose an alternative, discretization-free approach that combines classical and quantum resources in a global variational ansatz.
  arXiv  Detail & Related papers  (2024-09-10T10:54:59Z)
• Probing critical phenomena in open quantum systems using atom arrays [3.365378662696971]
  At quantum critical points, correlations decay as a power law, with exponents determined by a set of universal scaling dimensions. Here, we employ a Rydberg quantum simulator to adiabatically prepare critical ground states of both a one-dimensional ring and a two-dimensional square lattice. By accounting for and tuning the openness of our quantum system, we are able to directly observe power-law correlations and extract the corresponding scaling dimensions.
  arXiv  Detail & Related papers  (2024-02-23T15:21:38Z)
• Quantum data learning for quantum simulations in high-energy physics [55.41644538483948]
  We explore the applicability of quantum-data learning to practical problems in high-energy physics. We make use of ansatz based on quantum convolutional neural networks and numerically show that it is capable of recognizing quantum phases of ground states. The observation of non-trivial learning properties demonstrated in these benchmarks will motivate further exploration of the quantum-data learning architecture in high-energy physics.
  arXiv  Detail & Related papers  (2023-06-29T18:00:01Z)
• Multimode Squeezed State for Reconfigurable Quantum Networks at Telecommunication Wavelengths [0.0]
  We present an experimental source of multimode squeezed states of light at telecommunication wavelengths. Generation at such wavelengths is especially important as it can enable quantum information processing, communication, and sensing beyond the laboratory scale. Results pave the way for a scalable implementation of continuous variable quantum information protocols at telecommunication wavelengths.
  arXiv  Detail & Related papers  (2023-06-12T17:52:40Z)
• Quantum Computation and Simulation using Fermion-Pair Registers [0.0]
  We propose and analyze an approach to realize quantum computation and simulation using fermionic particles under quantum gas microscopes. We describe how to engineer the SWAP gate and high-fidelity controlled-phase gates. We show that 2D quantum Ising Hamiltonians with transverse and longitudinal fields can be efficient simulated by modulating Feshbach interaction strengths.
  arXiv  Detail & Related papers  (2023-06-06T17:59:08Z)
• Entanglement measures for two-particle quantum histories [0.0]
  We prove that bipartite quantum histories are entangled if and only if the Schmidt rank of this matrix is larger than 1. We then illustrate the non-classical nature of entangled histories with the use of Hardy's overlapping interferometers.
  arXiv  Detail & Related papers  (2022-12-14T20:48:36Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• Continuous-time dynamics and error scaling of noisy highly-entangling quantum circuits [58.720142291102135]
  We simulate a noisy quantum Fourier transform processor with up to 21 qubits. We take into account microscopic dissipative processes rather than relying on digital error models. We show that depending on the dissipative mechanisms at play, the choice of input state has a strong impact on the performance of the quantum algorithm.
  arXiv  Detail & Related papers  (2021-02-08T14:55:44Z)
• Information Scrambling in Computationally Complex Quantum Circuits [56.22772134614514]
  We experimentally investigate the dynamics of quantum scrambling on a 53-qubit quantum processor. We show that while operator spreading is captured by an efficient classical model, operator entanglement requires exponentially scaled computational resources to simulate.
  arXiv  Detail & Related papers  (2021-01-21T22:18:49Z)
• Quantum Phases of Matter on a 256-Atom Programmable Quantum Simulator [41.74498230885008]
  We demonstrate a programmable quantum simulator based on deterministically prepared two-dimensional arrays of neutral atoms. We benchmark the system by creating and characterizing high-fidelity antiferromagnetically ordered states. We then create and study several new quantum phases that arise from the interplay between interactions and coherent laser excitation.
  arXiv  Detail & Related papers  (2020-12-22T19:00:04Z)
• Entanglement transfer, accumulation and retrieval via quantum-walk-based qubit-qudit dynamics [50.591267188664666]
  Generation and control of quantum correlations in high-dimensional systems is a major challenge in the present landscape of quantum technologies. We propose a protocol that is able to attain entangled states of $d$-dimensional systems through a quantum-walk-based it transfer & accumulate mechanism. In particular, we illustrate a possible photonic implementation where the information is encoded in the orbital angular momentum and polarization degrees of freedom of single photons.
  arXiv  Detail & Related papers  (2020-10-14T14:33:34Z)

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.