Exploring electron spin dynamics in spin chains using defects as a quantum probe

• URL: http://arxiv.org/abs/2512.06722v1
• Date: Sun, 07 Dec 2025 08:26:45 GMT
• Title: Exploring electron spin dynamics in spin chains using defects as a quantum probe
• Authors: L. Soriano, A. Manoj-Kumar, G. Gerbaud, A. Savoyant, R. Dassonneville, H. Vezin, O. Jeannin, M. Orio, M. Fourmigué, S. Bertaina,
• Abstract summary: We investigate the quantum dynamics of the electron spin resonance of topological defects (edge state) in dimerized chains.<n>Our study reveals that electron spin lattice relaxation is governed at lowest temperatures by phonon-bottlenecked process.<n>We show that the inter edge-state effective dipolar field is reduced by the intrachain exchange coupling.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the quantum dynamics of the electron spin resonance of topological defects (edge state) in dimerized chains. These objects are discontinuities of the spin chain protected by the properties of the global system leading to a quantum many-body multiplet protected from the environment decoherence. Despite recent achievements in the realization of isolated and finite spin chains, the potential implementation in quantum devices needs the knowledge of the relaxation and decoherence sources. Our study reveals that electron spin lattice relaxation is governed at lowest temperatures by phonon-bottlenecked process and at high temperature by the chain dimerization gap. We show that the inter edge-state effective dipolar field is reduced by the intrachain exchange coupling leading to a longer coherence time than isolated ions at equivalent concentration. Ultimately, we demonstrate that the homogeneous broadening is governed by the intra-chain dipolar field, and we establish design principles for optimizing coherence in future materials.

Related papers

• Distinctive features of inhomogeneous spin chains [0.0]
  Review highlights results on perfect state transfer, out-of-equilibrium stationary dynamics in open systems, and entanglement and correlations in ground states.<n>Findings underscore some of the distinctive physical behavior of inhomogeneous spin chains and their potential applications in quantum information and thermal transport.
  arXiv  Detail & Related papers  (2024-11-14T14:50:00Z)
• Scalable spin squeezing from critical slowing down in short-range interacting systems [0.0]
  We show that scalable squeezing can be produced in 2d U(1)-symmetric systems even by short-range interactions. Our results open the path to realizing massive entangled states of potential metrological interest in many relevant platforms of quantum simulation and information processing.
  arXiv  Detail & Related papers  (2024-04-18T21:29:43Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Disordered monitored free fermions [0.0]
  In monitored free-fermionic models, the steady state undergoes an entanglement transition from a logarithmically entangled critical state to area-law. We show that the critical phase is stable up to a finite disorder and the criticality is consistent with the Berezinskii-Kosterlitz-Thouless universality. Our work opens the avenue to probe this novel phase transition in electronic systems of quantum dot arrays and nanowires.
  arXiv  Detail & Related papers  (2022-11-04T15:57:29Z)
• Effect of Emitters on Quantum State Transfer in Coupled Cavity Arrays [48.06402199083057]
  We study the effects of atoms in cavities which can absorb and emit photons as they propagate down the array. Our model is equivalent to previously examined spin chains in the one-excitation sector and in the absence of emitters.
  arXiv  Detail & Related papers  (2021-12-10T18:52:07Z)
• Rapid thermalization of spin chain commuting Hamiltonians [13.349045680843885]
  We prove that spin chains weakly coupled to a large heat bath thermalize rapidly at any temperature for finite-range, translation-invariant commuting Hamiltonians. This has wide-ranging applications to the study of many-body in and out-of-equilibrium quantum systems.
  arXiv  Detail & Related papers  (2021-12-01T16:08:10Z)
• Demonstration of electron-nuclear decoupling at a spin clock transition [54.088309058031705]
  Clock transitions protect molecular spin qubits from magnetic noise. linear coupling to nuclear degrees of freedom causes a modulation and decay of electronic coherence. An absence of quantum information leakage to the nuclear bath provides opportunities to characterize other decoherence sources.
  arXiv  Detail & Related papers  (2021-06-09T16:23:47Z)
• Chiral control of quantum states in non-Hermitian spin-orbit-coupled fermions [6.928292647332275]
  We implement dissipative spin-orbit-coupled bands filled with ultracold fermions. We observe parity-time symmetry breaking as a result of the competition between the spin-orbit coupling and dissipation. This demonstrates that we can explore non-Hermitian topological states with spin-orbit coupling.
  arXiv  Detail & Related papers  (2021-06-09T07:55:17Z)
• One-directional polarization transport in electron/nuclear spin chains with loss and gain [0.0]
  We study the non-Hermitian dynamics of hybrid electron/nuclear spin systems in the simultaneous presence of electron spin pumping and spin-lattice relaxation. We show that ring-like patterns - where the limit nuclear polarization is uniform - exhibit a non-decaying, externally-driven nuclear spin current.
  arXiv  Detail & Related papers  (2021-06-08T13:32:34Z)
• Chemical tuning of spin clock transitions in molecular monomers based on nuclear spin-free Ni(II) [52.259804540075514]
  We report the existence of a sizeable quantum tunnelling splitting between the two lowest electronic spin levels of mononuclear Ni complexes. The level anti-crossing, or magnetic clock transition, associated with this gap has been directly monitored by heat capacity experiments. The comparison of these results with those obtained for a Co derivative, for which tunnelling is forbidden by symmetry, shows that the clock transition leads to an effective suppression of intermolecular spin-spin interactions.
  arXiv  Detail & Related papers  (2021-03-04T13:31:40Z)
• 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)
• Non-equilibrium non-Markovian steady-states in open quantum many-body systems: Persistent oscillations in Heisenberg quantum spin chains [68.8204255655161]
  We investigate the effect of a non-Markovian, structured reservoir on an open Heisenberg spin chain. We establish a coherent self-feedback mechanism as the reservoir couples frequency-dependent to the spin chain.
  arXiv  Detail & Related papers  (2020-06-05T09:16:28Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)

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.