Journal ArticlePhysical Review Research · June 1, 2024
We investigate the nonequilibrium steady state of the anisotropic open quantum Rabi model, which exhibits first-order and second-order dissipative phase transitions upon varying the degree of anisotropy between the coupling strengths of rotating and counte ...
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Journal ArticlePhysical Review B · December 15, 2023
Generating and probing the magnon squeezing is an important challenge in the field of quantum magnonics. In this work, we propose a cavity magnonics setup with an easy-axis ferromagnet to address this challenge. To this end, we first establish a mechanism ...
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Journal ArticleCommunications Physics · December 1, 2023
The study of cavity magnonics and topological insulators has made significant advances over the past decade, however the possibility of combining the two fields is still unexplored. Here, we explore such connection by investigating hybrid cavity systems th ...
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Journal ArticlePhysical Review Research · October 1, 2023
We consider a one-dimensional Dicke lattice with complex photon hopping amplitudes and investigate the influence of time-reversal symmetry breaking due to synthetic magnetic fields. We show that, by tuning the total flux threading the lattice with a period ...
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Journal ArticlePhysical Review B · April 1, 2023
We show that phase transitions in the quantum q-state clock model for q≤4 can be characterized by an enhanced decay behavior of the Loschmidt echo via a small quench. The quantum criticality of the quantum q-state clock model is numerically investigated by ...
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Journal ArticlePhysical review letters · April 2022
Frustration occurs when a system cannot find a lowest-energy configuration due to conflicting constraints. We show that a frustrated superradiant phase transition occurs when the ground-state superradiance of cavity fields due to local light-matter interac ...
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Journal ArticlePhysical review letters · May 2020
We consider an ensemble of indistinguishable quantum machines and show that quantum statistical effects can give rise to a genuine quantum enhancement of the collective thermodynamic performance. When multiple indistinguishable bosonic work resources are c ...
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Journal ArticlePhysical Review B · November 6, 2019
The out-of-time-ordered correlator (OTOC) is central to the understanding of information scrambling in quantum many-body systems. In this work, we show that the OTOC in a quantum many-body system close to its critical point obeys dynamical scaling laws whi ...
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Journal ArticlePhysical review letters · December 2017
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Recently observed quantum emitters in hexagonal boron nitride (hBN) membranes have a potential for achieving high accessibility and controllability thanks to the lower spatial dimension. Moreover, these objects naturally have a high sensitivity to vibratio ...
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Journal ArticlePhysical review letters · February 2017
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We demonstrate that the quantum phase transition (QPT) of the Rabi model and critical dynamics near the QPT can be probed in the setup of a single trapped ion. We first demonstrate that there exists equilibrium and nonequilibrium scaling functions of the R ...
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Journal ArticlePhysical review letters · September 2016
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Phase transitions are commonly held to occur only in the thermodynamical limit of a large number of system components. Here, we exemplify at the hand of the exactly solvable Jaynes-Cummings (JC) model and its generalization to finite JC lattices that finit ...
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Journal ArticlePhysical review letters · April 2016
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We explore the photon population dynamics in two coupled circuit QED systems. For a sufficiently weak intercavity photon hopping, as the photon-cavity coupling increases, the dynamics undergoes double transitions first from a delocalized to a localized pha ...
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Journal ArticlePhysical review letters · October 2015
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We consider the Rabi Hamiltonian, which exhibits a quantum phase transition (QPT) despite consisting only of a single-mode cavity field and a two-level atom. We prove QPT by deriving an exact solution in the limit where the atomic transition frequency in t ...
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Journal ArticleJournal of physics. Condensed matter : an Institute of Physics journal · September 2010
We propose a scheme of strong and tunable coupling between a superconducting phase qubit and a nanomechanical torsional resonator. In our scheme the torsional resonator directly modulates the largest energy scale (the Josephson coupling energy) of the phas ...
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