Engineering protected cavity-QED interactions through pulsed dynamical decoupling

• URL: http://arxiv.org/abs/2505.02929v1
• Date: Mon, 05 May 2025 18:05:58 GMT
• Title: Engineering protected cavity-QED interactions through pulsed dynamical decoupling
• Authors: I. Arrazola, P. Bertet, Y. Chu, P. Rabl,
• Abstract summary: We study a generic cavity QED setup under conditions where the coupling between the two-level systems and a single bosonic mode is significantly degraded by low-frequency noise.<n>We identify pulsed dynamical decoupling strategies that suppress the effects of noise while still allowing for a coherent exchange of excitations between the individual subsystems.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: We study a generic cavity QED setup under conditions where the coupling between the two-level systems and a single bosonic mode is significantly degraded by low-frequency noise. To overcome this problem, we identify pulsed dynamical decoupling strategies that suppress the effects of noise while still allowing for a coherent exchange of excitations between the individual subsystems. The corresponding pulse sequences can be further designed to realize either Jaynes-Cummings, anti-Jaynes-Cummings, or Rabi couplings, as well as different types of cavity-mediated interactions between the two-level systems. A detailed analysis of the residual imperfections demonstrates that this decoupling strategy can boost the effective cooperativity of the cavity QED system by several orders of magnitude and improve the fidelity of quantum-technologically relevant operations accordingly.

Related papers

• Quantum Acoustics with Superconducting Qubits in the Multimode Transition-Coupling Regime [22.69109759836908]
  We fabricate a tunable coupling device to investigate the coupling of a superconducting transmon qubit to a surface acoustic wave resonator.<n>We show that the qubit achieves both fast reset and high coherence performance when the qubit is coupled to the reset mode in the transition-coupling regime.
  arXiv  Detail & Related papers  (2025-05-08T10:57:42Z)
• Analytically Solvable Robust Single-Qubit Gates for Multi-Qubit Systems with Unwanted Couplings [5.169264860833405]
  Couplings between qubits can induce crosstalk errors that degrade single-qubit gate fidelity.<n>We present a novel non-perturbative framework for constructing high-fidelity single-qubit gates in the presence of unwanted couplings.
  arXiv  Detail & Related papers  (2025-03-16T09:33:23Z)
• Speeding up Quantum Annealing with Engineered Dephasing [0.0]
  We show that engineered dephasing can enhance the adiabaticity of controlled quantum dynamics.<n>We discuss the experimental feasibility of the protocols, and investigate the trade-off between fidelity and implementability.
  arXiv  Detail & Related papers  (2024-09-24T09:18:02Z)
• Learning How to Dynamically Decouple [0.40964539027092917]
  Current quantum computers suffer from noise that stems from interactions between the quantum system and its environment.<n>We show that the performance of dynamical decoupling can be improved by optimizing its rotational gates to tailor them to the quantum hardware.
  arXiv  Detail & Related papers  (2024-05-14T15:11:39Z)
• Stochastic action for the entanglement of a noisy monitored two-qubit system [55.2480439325792]
  We study the effect of local unitary noise on the entanglement evolution of a two-qubit system subject to local monitoring and inter-qubit coupling. We construct a Hamiltonian by incorporating the noise into the Chantasri-Dressel-Jordan path integral and use it to identify the optimal entanglement dynamics. Numerical investigation of long-time steady-state entanglement reveals a non-monotonic relationship between concurrence and noise strength.
  arXiv  Detail & Related papers  (2024-03-13T11:14:10Z)
• On-demand transposition across light-matter interaction regimes in bosonic cQED [69.65384453064829]
  Bosonic cQED employs the light field of high-Q superconducting cavities coupled to non-linear circuit elements. We present the first experiment to achieve fast switching of the interaction regime without deteriorating the cavity coherence. Our work opens up a new paradigm to probe the full range of light-matter interaction dynamics within a single platform.
  arXiv  Detail & Related papers  (2023-12-22T13:01:32Z)
• Generation of C-NOT, SWAP, and C-Z Gates for Two Qubits Using Coherent and Incoherent Controls and Stochastic Optimization [56.47577824219207]
  We consider a general form of the dynamics of open quantum systems determined by the Gorini-Kossakowsky-Sudarchhan-Lindblad type master equation. We analyze the control problems of generating two-qubit C-NOT, SWAP, and C-Z gates using piecewise constant controls and optimization.
  arXiv  Detail & Related papers  (2023-12-09T17:55:47Z)
• Autonomous coherence protection of a two-level system in a fluctuating environment [68.8204255655161]
  We re-examine a scheme originally intended to remove the effects of static Doppler broadening from an ensemble of non-interacting two-level systems (qubits) We demonstrate that this scheme is far more powerful and can also protect a single (or even an ensemble) qubit's energy levels from noise which depends on both time and space.
  arXiv  Detail & Related papers  (2023-02-08T01:44:30Z)
• Strong parametric dispersive shifts in a statically decoupled multi-qubit cavity QED system [0.4915375958667782]
  Cavity quantum electrodynamics (QED) with in-situ tunable interactions is important for developing novel systems for quantum simulation and computing. Here, we couple two transmon qubits to a lumped-element cavity through a shared dc-SQUID. We show that by parametrically driving the SQUID with an oscillating flux it is possible to independently tune the interactions between either of the qubits and the cavity dynamically.
  arXiv  Detail & Related papers  (2021-03-16T18:46:57Z)
• Process tomography of Robust Dynamical Decoupling in Superconducting Qubits [91.3755431537592]
  The Rigetti quantum computing platform was used to test different dynamical decoupling sequences. The performance of the sequences was characterized by Quantum Process Tomography and analyzed using the quantum channels formalism.
  arXiv  Detail & Related papers  (2020-06-18T14:48:18Z)
• Switching dynamics of single and coupled VO2-based oscillators as elements of neural networks [55.41644538483948]
  We report on the switching dynamics of both single and coupled VO2-based oscillators, with resistive and capacitive coupling, and explore the capability of their application in neural networks. For the resistive coupling, it is shown that synchronization takes place at a certain value of the coupling resistance, though it is unstable and a synchronization failure occurs periodically. For the capacitive coupling, two synchronization modes, with weak and strong coupling, are found. The transition between these modes is accompanied by chaotic oscillations.
  arXiv  Detail & Related papers  (2020-01-07T02:16:04Z)

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.