Experimental Investigation of Geometric Quantum Speed Limits in an Open Quantum System

• URL: http://arxiv.org/abs/2307.06558v3
• Date: Fri, 3 May 2024 13:11:50 GMT
• Title: Experimental Investigation of Geometric Quantum Speed Limits in an Open Quantum System
• Authors: Diego Paiva Pires, Eduardo R. deAzevedo, Diogo O. Soares-Pinto, Frederico Brito, Jefferson G. Filgueiras,
• Abstract summary: We studied geometric quantum speed limits (QSL) of a qubit subject to decoherence in an ensemble of chloroform molecules. We used two distinguishability measures of quantum states to assess the speed of the qubit evolution.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We studied geometric quantum speed limits (QSL) of a qubit subject to decoherence in an ensemble of chloroform molecules in a Nuclear Magnetic Resonance experiment. The QSL is a fundamental lower bound on the evolution time for quantum systems undergoing general physical processes. To do so, we controlled the system-reservoir interaction and the spin relaxation rates by adding a paramagnetic salt, which allowed us to observe both Markovian and non-Markovian open system dynamics for the qubit. We used two distinguishability measures of quantum states to assess the speed of the qubit evolution: the quantum Fisher information (QFI) and Wigner-Yanase skew information (WY). For non-Markovian dynamics and low salt concentrations, we observed crossovers between QSLs related to the QFI and WY metrics. The WY metric sets the tighter QSL for high concentrations and Markovian dynamics. We also show that QSLs are sensitive even to small fluctuations in spin magnetization.

Related papers

• Dynamics of Steered Quantum Coherence and Magic Resource under Sudden Quench [0.0]
  We find that the system's response is highly sensitive to the initial state and magnetic field strength. Results highlight the interplay between the quantum information resources and dynamics of quantum systems away from the equilibrium.
  arXiv  Detail & Related papers  (2024-05-11T09:05:00Z)
• Quantum steering ellipsoids and quantum obesity in critical systems [0.0]
  Quantum obesity (QO) is new function used to quantify quantum correlations beyond entanglement. We show that QO is a fundamental quantity to observe signature of quantum phase transitions.
  arXiv  Detail & Related papers  (2023-12-19T19:14:08Z)
• Quantum Speed Limit under Brachistochrone Evolution [0.0]
  We propose a geometrical approach to derive a quantum speed limit (QSL) bound for closed and open quantum systems. We show that the QSL between a given initial state to a final state is determined not only by the entire dynamics of the system but also by the individual dynamics of a critical parameter.
  arXiv  Detail & Related papers  (2022-07-30T14:30:01Z)
• Quantum correlations and speed limit of central spin system [0.0]
  We consider single, and two-qubit central spin systems interacting with spin baths and discuss their dynamical properties. The impact of the size of the spin bath on the quantum speed limit for a single qubit central spin model is analyzed.
  arXiv  Detail & Related papers  (2022-05-26T07:16:25Z)
• Preserving quantum correlations and coherence with non-Markovianity [50.591267188664666]
  We demonstrate the usefulness of non-Markovianity for preserving correlations and coherence in quantum systems. For covariant qubit evolutions, we show that non-Markovianity can be used to preserve quantum coherence at all times.
  arXiv  Detail & Related papers  (2021-06-25T11:52:51Z)
• 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)
• Spin Entanglement and Magnetic Competition via Long-range Interactions in Spinor Quantum Optical Lattices [62.997667081978825]
  We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter. We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios. These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
  arXiv  Detail & Related papers  (2020-11-16T08:03:44Z)
• Quantum information spreading in a disordered quantum walk [50.591267188664666]
  We design a quantum probing protocol using Quantum Walks to investigate the Quantum Information spreading pattern. We focus on the coherent static and dynamic disorder to investigate anomalous and classical transport. Our results show that a Quantum Walk can be considered as a readout device of information about defects and perturbations occurring in complex networks.
  arXiv  Detail & Related papers  (2020-10-20T20:03:19Z)
• Probing the Universality of Topological Defect Formation in a Quantum Annealer: Kibble-Zurek Mechanism and Beyond [46.39654665163597]
  We report on experimental tests of topological defect formation via the one-dimensional transverse-field Ising model. We find that the quantum simulator results can indeed be explained by the KZM for open-system quantum dynamics with phase-flip errors. This implies that the theoretical predictions of the generalized KZM theory, which assumes isolation from the environment, applies beyond its original scope to an open system.
  arXiv  Detail & Related papers  (2020-01-31T02:55:35Z)
• Jumptime unraveling of Markovian open quantum systems [68.8204255655161]
  We introduce jumptime unraveling as a distinct description of open quantum systems. quantum jump trajectories emerge, physically, from continuous quantum measurements. We demonstrate that quantum trajectories can also be ensemble-averaged at specific jump counts.
  arXiv  Detail & Related papers  (2020-01-24T09:35:32Z)
• Quantum Information Scrambling and Entanglement in Bipartite Quantum States [0.0]
  We establish the mathematical connections among the quantifiers known as quantum information scrambling. We investigate the influence of QI scrambling on entanglement in two qubits prepared in Bell states.
  arXiv  Detail & Related papers  (2020-01-17T10:22:27Z)

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.