Exploring quantum coherence, spin squeezing and entanglement in an extended spin-1/2 XX Chain

• URL: http://arxiv.org/abs/2401.12500v1
• Date: Tue, 23 Jan 2024 05:51:06 GMT
• Title: Exploring quantum coherence, spin squeezing and entanglement in an extended spin-1/2 XX Chain
• Authors: S. Mahdavifar, F. Khastehdel Fumani, B. Haghdoost, and M. R. Soltani
• Abstract summary: We study the ground state phase diagram of the spin-1/2 XX chain model, which features $XZY-YZX$ type three-spin interactions (TSI) Our research unveils diverse regions within the phase diagram, each characterized by coherent, squeezed, or entangled states.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In this study, we explore the ground state phase diagram of the spin-1/2 XX chain model, which features $XZY-YZX$ type three-spin interactions (TSI). This model, while seemingly simple, reveals a rich tapestry of quantum behaviors. Our analysis relies on several key metrics. The '$l_1$-norm of coherence' helps us identify coherent states within the phase diagram, which represent states capable of superposition and interference. We employ the 'spin squeezing parameter' to pinpoint unique coherent states characterized by isotropic noise in all directions, making them invaluable for quantum metrology. Additionally, we utilize the 'entanglement entropy' to determine which of these coherent states exhibit entanglement, indicating states that cannot be fully described by local variables. Our research unveils diverse regions within the phase diagram, each characterized by coherent, squeezed, or entangled states, offering insights into the quantum phenomena underling these systems. We also study the critical scaling versus the system size for the mentioned quantities.

Related papers

• 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)
• Orthonormal bases of extreme quantumness [1.1510009152620668]
  Some coherent and anticoherent spin states are known as optimal quantum rotosensors. We introduce a measure of quantumness for orthonormal bases of spin states, determined by the average anticoherence of individual vectors and the Wehrl entropy.
  arXiv  Detail & Related papers  (2023-06-01T10:35:45Z)
• Evolution of many-body systems under ancilla quantum measurements [58.720142291102135]
  We study the concept of implementing quantum measurements by coupling a many-body lattice system to an ancillary degree of freedom. We find evidence of a disentangling-entangling measurement-induced transition as was previously observed in more abstract models.
  arXiv  Detail & Related papers  (2023-03-13T13:06:40Z)
• Geometric phases along quantum trajectories [58.720142291102135]
  We study the distribution function of geometric phases in monitored quantum systems. For the single trajectory exhibiting no quantum jumps, a topological transition in the phase acquired after a cycle. For the same parameters, the density matrix does not show any interference.
  arXiv  Detail & Related papers  (2023-01-10T22:05:18Z)
• Quantum information spreading in random spin chains with topological order [0.0]
  Tripartite mutual information (TMI) based on operator-based entanglement entropy (EE) is an efficient tool for measuring them. We study random spin chains that exhibit phase transitions accompanying non-trivial change in topological properties. Quench dynamics of the EE and TMI display interesting behaviors providing essential perspective concerning encoding of quantum information.
  arXiv  Detail & Related papers  (2022-05-06T04:26:52Z)
• Generalized Phase-Space Techniques to Explore Quantum Phase Transitions in Critical Quantum Spin Systems [0.0]
  We apply the generalized Wigner function formalism to detect and characterize a range of quantum phase transitions. We demonstrate the utility of phase-space techniques in witnessing and characterizing first-, second- and infinite-order quantum phase transitions. We also highlight the method's ability to capture other features of spin systems such as ground-state factorization and critical system scaling.
  arXiv  Detail & Related papers  (2022-03-23T10:46:00Z)
• Extreme depolarization for any spin [0.0]
  We study the depolarization, both isotropic and anisotropic, of a quantum spin of arbitrary spin quantum number $j$. We establish a precise link between superdecoherence and entanglement.
  arXiv  Detail & Related papers  (2021-06-22T11:31:54Z)
• Partitioning dysprosium's electronic spin to reveal entanglement in non-classical states [55.41644538483948]
  We report on an experimental study of entanglement in dysprosium's electronic spin. Our findings open up the possibility to engineer novel types of entangled atomic ensembles.
  arXiv  Detail & Related papers  (2021-04-29T15:02:22Z)
• Superposition of two-mode squeezed states for quantum information processing and quantum sensing [55.41644538483948]
  We investigate superpositions of two-mode squeezed states (TMSSs) TMSSs have potential applications to quantum information processing and quantum sensing.
  arXiv  Detail & Related papers  (2021-02-01T18:09:01Z)
• Bose-Einstein condensate soliton qubit states for metrological applications [58.720142291102135]
  We propose novel quantum metrology applications with two soliton qubit states. Phase space analysis, in terms of population imbalance - phase difference variables, is also performed to demonstrate macroscopic quantum self-trapping regimes.
  arXiv  Detail & Related papers  (2020-11-26T09:05:06Z)
• Einselection from incompatible decoherence channels [62.997667081978825]
  We analyze an open quantum dynamics inspired by CQED experiments with two non-commuting Lindblad operators. We show that Fock states remain the most robust states to decoherence up to a critical coupling.
  arXiv  Detail & Related papers  (2020-01-29T14:15:19Z)

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.