Experimentally verifying anti-Kibble-Zurek behavior in a quantum system under noisy control field

• URL: http://arxiv.org/abs/2008.00885v1
• Date: Mon, 3 Aug 2020 14:03:21 GMT
• Title: Experimentally verifying anti-Kibble-Zurek behavior in a quantum system under noisy control field
• Authors: Ming-Zhong Ai, Jin-Ming Cui, Ran He, Zhong-Hua Qian, Xin-Xia Gao, Yun-Feng Huang, Chuan-Feng Li, and Guang-Can Guo
• Abstract summary: Kibble-Zurek mechanism (KZM) is a universal framework which could in principle describe phase transition phenomenon. A conflicting observation termed anti-KZ behavior has been reported in the study of ferroelectric phase transition. Our research sets a stage for quantum simulation of such anti-KZ behavior in two-level systems.
• Score: 38.305954220018315
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Kibble-Zurek mechanism (KZM) is a universal framework which could in principle describe phase transition phenomenon in any system with required symmetry properties. However, a conflicting observation termed anti-KZ behavior has been reported in the study of ferroelectric phase transition, in which slower driving results in more topological defects [S. M. Griffin, et al. Phys. Rev. X. 2, 041022 (2012)]. Although this research is significant, its experimental simulations have been scarce until now. In this work, we experimentally demonstrate anti-KZ behavior under noisy control field in three kinds of quantum phase transition protocols using a single trapped Yb ion. The density of defects is studied as a function of the quench time and the noise intensity. We experimentally verify that the optimal quench time to minimize excitation scales as a universal power law of the noise intensity. Our research sets a stage for quantum simulation of such anti-KZ behavior in two-level systems and reveals the limitations of the adiabatic protocols such as quantum annealing.

Related papers

• Statistics of topological defects across a phase transition in a superconducting quantum processor [0.0]
  We investigate the counting statistics of kink density in the 1D transverse-field quantum Ising model. We demonstrate on a 20-qubit quantum processing unit, that disrupts higher-order cumulants follow universal power law scaling. We also show the breakdown of the KZM mechanism for short quenches for finite-size systems.
  arXiv  Detail & Related papers  (2024-10-08T18:00:01Z)
• Protect Measurement-Induced Phase Transition from Noise [3.134848671499466]
  Measurement-induced phase transition (MIPT) is a novel non-equilibrium phase transition characterized by entanglement entropy. We show that incorporating quantum-enhanced operations can effectively protect MIPT from environmental noise.
  arXiv  Detail & Related papers  (2024-06-20T08:49:15Z)
• Symmetry-protection Zeno phase transition in monitored lattice gauge theories [0.0]
  We show the existence of a sharp transition, triggered by the measurement rate, between a protected gauge-theory regime and an irregular regime. Our results shed light on the dissipative criticality of strongly-interacting, highly-constrained quantum systems.
  arXiv  Detail & Related papers  (2024-05-28T18:18:06Z)
• Universality of critical dynamics with finite entanglement [68.8204255655161]
  We study how low-energy dynamics of quantum systems near criticality are modified by finite entanglement. Our result establishes the precise role played by entanglement in time-dependent critical phenomena.
  arXiv  Detail & Related papers  (2023-01-23T19:23:54Z)
• Experimental validation of the Kibble-Zurek Mechanism on a Digital Quantum Computer [62.997667081978825]
  The Kibble-Zurek mechanism captures the essential physics of nonequilibrium quantum phase transitions with symmetry breaking. We experimentally tested the KZM for the simplest quantum case, a single qubit under the Landau-Zener evolution. We report on extensive IBM-Q experiments on individual qubits embedded in different circuit environments and topologies.
  arXiv  Detail & Related papers  (2022-08-01T18:00:02Z)
• Probing finite-temperature observables in quantum simulators of spin systems with short-time dynamics [62.997667081978825]
  We show how finite-temperature observables can be obtained with an algorithm motivated from the Jarzynski equality. We show that a finite temperature phase transition in the long-range transverse field Ising model can be characterized in trapped ion quantum simulators.
  arXiv  Detail & Related papers  (2022-06-03T18:00:02Z)
• Quantum asymmetry and noisy multi-mode interferometry [55.41644538483948]
  Quantum asymmetry is a physical resource which coincides with the amount of coherence between the eigenspaces of a generator. We show that the asymmetry may emphincrease as a result of a emphdecrease of coherence inside a degenerate subspace.
  arXiv  Detail & Related papers  (2021-07-23T07:30:57Z)
• The effect of chaos on the simulation of quantum critical phenomena in analog quantum simulators [0.0]
  We study how chaos, introduced by a weak perturbation, affects the reliability of the output of analog quantum simulation. Inspired by the semiclassical behavior of the order parameter in the thermodynamic limit, we propose a protocol to measure the quantum phase transition in the ground state.
  arXiv  Detail & Related papers  (2021-03-03T22:03:43Z)
• Probing the coherence of solid-state qubits at avoided crossings [51.805457601192614]
  We study the quantum dynamics of paramagnetic defects interacting with a nuclear spin bath at avoided crossings. The proposed theoretical approach paves the way to designing the coherence properties of spin qubits from first principles.
  arXiv  Detail & Related papers  (2020-10-21T15:37:59Z)

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.