Non-Gaussian superradiant transition via three-body ultrastrong coupling
- URL: http://arxiv.org/abs/2204.03520v1
- Date: Thu, 7 Apr 2022 15:39:21 GMT
- Title: Non-Gaussian superradiant transition via three-body ultrastrong coupling
- Authors: Fabrizio Minganti, Louis Garbe, Alexandre Le Boit\'e, Simone Felicetti
- Abstract summary: We introduce a class of quantum optical Hamiltonian characterized by three-body couplings.
We propose a circuit-QED scheme based on state-of-the-art technology that implements the considered model.
- Score: 62.997667081978825
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We introduce a class of quantum optical Hamiltonian characterized by
three-body couplings, and propose a circuit-QED scheme based on
state-of-the-art technology that implements the considered model. Unlike
two-body light-matter interactions, this three-body coupling Hamiltonian is
exclusively composed of terms which do not conserve the particle number. We
explore the three-body ultrastrong coupling regime, showing the emergence of a
superradiant phase transition which is of first order, is characterized by the
breaking of a $\mathbb{Z}_2\times \mathbb{Z}_2$ symmetry and has a strongly
non-Gaussian nature. Indeed, in contrast to what is observed in any
two-body-coupling model, in proximity of the transition the ground state
exhibits a divergent coskewness, i.e., quantum correlations that cannot be
captured within semiclassical and Gaussian approximations. Furthermore, we
demonstrate the robustness of our findings by including dissipative processes
in the model, showing that the steady-state of the system inherits from the
ground states the most prominent features of the transition.
Related papers
- Unified picture of measurement-induced ionization in the transmon [72.27323884094953]
We develop a comprehensive framework which provides a unified physical picture of the origin of transmon ionization.
This framework identifies the multiphoton resonances responsible for transmon ionization.
It also allows us to efficiently compute numerical estimates of the photon number threshold for ionization.
arXiv Detail & Related papers (2024-02-09T18:46:50Z) - Emergence of non-Abelian SU(2) invariance in Abelian frustrated
fermionic ladders [37.69303106863453]
We consider a system of interacting spinless fermions on a two-leg triangular ladder with $pi/2$ magnetic flux per triangular plaquette.
Microscopically, the system exhibits a U(1) symmetry corresponding to the conservation of total fermionic charge, and a discrete $mathbbZ$ symmetry.
At the intersection of the three phases, the system features a critical point with an emergent SU(2) symmetry.
arXiv Detail & Related papers (2023-05-11T15:57:27Z) - Third quantization of open quantum systems: new dissipative symmetries
and connections to phase-space and Keldysh field theory formulations [77.34726150561087]
We reformulate the technique of third quantization in a way that explicitly connects all three methods.
We first show that our formulation reveals a fundamental dissipative symmetry present in all quadratic bosonic or fermionic Lindbladians.
For bosons, we then show that the Wigner function and the characteristic function can be thought of as ''wavefunctions'' of the density matrix.
arXiv Detail & Related papers (2023-02-27T18:56:40Z) - Classical and quantum facilitated exclusion processes [0.0]
We show that the quantum analogue of the classical facilitated process engineers an interesting $quantum$ $absorbing$ $transition$ where the quantum particles transit from an unentangled direct-product absorbing phase to an entangled steady state with a finite current at density $rho=1/2$.
Our work ties the two sub-fields of classically interacting exclusion processes, and interacting non-Hermitian quantum Hamiltonians to show common themes in the non-equilibrium phases they realise.
arXiv Detail & Related papers (2023-02-17T12:43:55Z) - Dilute neutron star matter from neural-network quantum states [58.720142291102135]
Low-density neutron matter is characterized by the formation of Cooper pairs and the onset of superfluidity.
We model this density regime by capitalizing on the expressivity of the hidden-nucleon neural-network quantum states combined with variational Monte Carlo and reconfiguration techniques.
arXiv Detail & Related papers (2022-12-08T17:55:25Z) - Quantum simulator of link models using spinor dipolar ultracold atoms [0.0]
Scheme for the quantum simulation of quantum link models in two-dimensional lattices is presented.
We derivation the parameters of the quantum link models by means of two different approaches.
The extension to three-dimensional lattices is presented, and its subtleties are pointed out.
arXiv Detail & Related papers (2022-10-26T16:36:05Z) - Quantum correlations, entanglement spectrum and coherence of
two-particle reduced density matrix in the Extended Hubbard Model [62.997667081978825]
We study the ground state properties of the one-dimensional extended Hubbard model at half-filling.
In particular, in the superconducting region, we obtain that the entanglement spectrum signals a transition between a dominant singlet (SS) to triplet (TS) pairing ordering in the system.
arXiv Detail & Related papers (2021-10-29T21:02:24Z) - Electric circuit emulation of topological transitions driven by quantum
statistics [0.0]
We predict the topological transition in the two-particle interacting system driven by the particles' quantum statistics.
As a toy model, we investigate an extended one-dimensional Hubbard model with two anyonic excitations obeying fractional quantum statistics.
We develop a rigorous method to emulate the eigenmodes and eigenenergies of anyon pairs with resonant electric circuits.
arXiv Detail & Related papers (2021-08-23T22:34:52Z) - 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) - Chiral waveguide optomechanics: first order quantum phase transitions
with $\mathbb{Z}_3$ symmetry breaking/ [0.0]
We present a direct mapping between the quantum optomechanical problem of the atoms harmonically trapped in the vicinity of a chiral waveguide and a generalized quantum Rabi model.
We extend the class of the superradiant phase transitions for the systems possessing $mathbbZ_3$ rather than parity $mathbbZ$ symmetry.
arXiv Detail & Related papers (2020-09-02T18:34:21Z)
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.