Spin-spin coupling-based quantum and classical phase transitions in
two-impurity spin-boson models
- URL: http://arxiv.org/abs/2205.09367v1
- Date: Thu, 19 May 2022 08:01:03 GMT
- Title: Spin-spin coupling-based quantum and classical phase transitions in
two-impurity spin-boson models
- Authors: Roberto Grimaudo, Antonino Messina, Hiromichi Nakazato, Alessandro
Sergi, and Davide Valenti
- Abstract summary: Two-interacting-impurity spin-boson models with vanishing transverse fields on the spin-pair are studied.
The dynamics of the magnetization is analysed for different levels of (an)isotropy.
- Score: 55.41644538483948
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: The class of two-interacting-impurity spin-boson models with vanishing
transverse fields on the spin-pair is studied. The model can be exactly mapped
into two independent standard single-impurity spin-boson models where the role
of the tunnelling parameter is played by the spin-spin coupling. The dynamics
of the magnetization is analysed for different levels of (an)isotropy. Further,
the existence of a decoherence-free subspace as well as of both classical and
quantum (first-order and Kosterlitz-Thouless type) phase transitions, in the
Omhic regime, is brought to light.
Related papers
- Spin resolved momentum spectra for vacuum pair production via a generalized two level model [17.44597560204009]
We have formulated a generalized two level model for studying the pair production in multidimensional time-dependent electric fields.
It can provide momentum spectra with fully spin resolved components for all possible combined spin states of the particle and anti-particle simultaneously.
It is believed that by this two level model one can extend researches on pair production for more different background fields.
arXiv Detail & Related papers (2024-09-18T09:33:40Z) - Thermodynamic Limit in the Two-qubit Quantum Rabi Model with Spin-Spin
Coupling [0.0]
A second-order superradiant quantum phase transition is brought to light in a quantum system consisting of two interacting qubits coupled to the same quantized field mode.
We introduce an appropriate thermodynamic-like limit for the integrable two-qubit quantum Rabi model with spin-spin interaction.
arXiv Detail & Related papers (2023-10-30T14:52:50Z) - Scalable spin squeezing in two-dimensional arrays of dipolar large-$S$
spins [0.0]
We show that spin-spin interactions lead to scalable spin squeezing along the non-equilibrium unitary evolution in a coherent spin state.
For sufficiently small quadratic shifts, the spin squeezing dynamics is akin to that produced by the paradigmatic one-axis-twisting (OAT) model.
Spin squeezing with OAT-like scaling is shown to be protected by the robustness of long-range ferromagnetic order to quadratic shifts.
arXiv Detail & Related papers (2023-09-11T10:32:24Z) - Dispersive Non-reciprocity between a Qubit and a Cavity [24.911532779175175]
We present an experimental study of a non-reciprocal dispersive-type interaction between a transmon qubit and a superconducting cavity.
We show that the qubit-cavity dynamics is well-described in a wide parameter regime by a simple non-reciprocal master-equation model.
arXiv Detail & Related papers (2023-07-07T17:19:18Z) - Emergence of anyonic correlations from spin and charge dynamics in one
dimension [19.444636864515726]
We propose a transformation for spin and charge degrees of freedom in one-dimensional lattice systems, constrained to have no doubly occupied sites.
The transformation delivers particle creation and operators in a form of a spinless particle and a non-local operator acting on the space of states of a spin-$1/2$ chain.
arXiv Detail & Related papers (2023-01-05T17:22:39Z) - Quantum phase transitions for an integrable quantum Rabi-like model with
two interacting qubits [0.0]
A two-interacting-qubit quantum Rabi-like model with vanishing transverse fields on the qubit-pair is studied.
Independently of the coupling regime, this model can be exactly and unitarily reduced to two independent single-spin quantum Rabi models.
arXiv Detail & Related papers (2022-11-14T08:51:54Z) - The Effect of Duschinskii Rotations on Spin-Dependent Electron Transfer
Dynamics [0.0]
We investigate spin-dependent electron transfer in the presence of a Duschinskii rotation.
In particular, we propagate dynamics for a two-level model system for which spin-orbit coupling introduces an interstate coupling of the form $eiWx$.
arXiv Detail & Related papers (2022-08-29T05:49:59Z) - Precession of entangled spin and pseudospin in double quantum dots [0.0]
Quantum dot spin valves are characterized by exchange fields which induce spin precession and generate current spin resonances.
We generalize this setup to allow for arbitrary spin and orbital polarization of the leads.
We observe for both vectors a delicate interplay of decoherence, pumping and precession which can only be understood by considering the dynamics of the spin-pseudospin correlators.
arXiv Detail & Related papers (2022-02-08T23:00:00Z) - Peratic Phase Transition by Bulk-to-Surface Response [26.49714398456829]
We show a duality between many-body dynamics and static Hamiltonian ground states for both classical and quantum systems.
Our prediction of peratic phase transition has direct consequences in quantum simulation platforms such as Rydberg atoms and superconducting qubits.
arXiv Detail & Related papers (2021-09-27T18:00:01Z) - Phase diagram of a distorted kagome antiferromagnet and application to
Y-kapellasite [50.591267188664666]
We reveal a rich ground state phase diagram even at the classical level.
The presented model opens a new direction in the study of kagome antiferromagnets.
arXiv Detail & Related papers (2021-07-28T18:00:03Z)
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.