Interplay of quantum phase transition and flat band in hybrid lattices

Zhu, Gui-Lei; Ramezani, Hamidreza; Emary, Clive; Gao, Jin-Hua; Wu, Ying; Lü, Xin-You

doi:10.1103/physrevresearch.2.033463

Cited by 13 publications

(9 citation statements)

References 73 publications

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“…In the previous section, we studied the KPO as a ubiquitous model describing a broad class of systems, where one directly drives a bosonic resonator (be it vibrational, electric, photonic, or composed of more complex particles) with a two-particle drive. In this section, we consider instead a many-body light-matter system, where PTs appear due to the coupling between the matter degrees of freedom and a bosonic resonator cavity [23,[57][58][59][60][61][62][63][64][65]. We specifically study a ubiquitous model describing light-matter systems, dubbed the interpolating Dicke-Tavis-Cummings (IDTC) model [22,30,66,67], which is a generalized version of the Dicke [57,68,69] and the Tavis-Cummings [70] models.…”

Section: B Interpolating Dicke-tavis-cummingsmentioning

confidence: 99%

Distinctive class of dissipation-induced phase transitions and their universal characteristics

Soriente,

Heugel,

Arimitsu

et al. 2021

Preprint

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Coupling a system to a nonthermal environment can profoundly affect the phase diagram of the closed system, giving rise to a special class of dissipation-induced phase transitions. Such transitions take the system out of its ground state and stabilize a higher-energy stationary state, rendering it the sole attractor of the dissipative dynamics. In this work, we present a unifying methodology, which we use to characterize this ubiquitous phenomenology and its implications for the open system dynamics. Specifically, we analyze the closed system's phase diagram, including symmetry-broken phases, and explore their corresponding excitations' spectra. Opening the system, the environment can overwhelm the system's symmetry-breaking tendencies, and changes its order parameter. As a result, isolated distinct phases of similar order become connected, and new phase-costability regions appear. Interestingly, the excitations differ in the newly-connected regions through a change in their symplectic norm, which is robust to the introduction of dissipation. As a result, by tuning the system from one phase to the other across the dissipation-stabilized region, the open system fluctuations exhibit an exceptional point-like scenario, where the fluctuations become overdamped, only to reappear with an opposite sign in the dynamical response function of the system. The overdamped region is also associated with squeezing of the fluctuations. We demonstrate the pervasive nature of such dissipation-induced phenomena in two prominent examples, namely in parametric resonators and in light-matter systems. Our work draws a crucial distinction between quantum phase transitions and their zero-temperature open system counterparts.

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Section: B Interpolating Dicke-tavis-cummingsmentioning

confidence: 99%

Distinctive class of dissipation-induced phase transitions and their universal characteristics

Soriente,

Heugel,

Arimitsu

et al. 2021

Preprint

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“…[54][55][56][57] Therefore, it is a mature prototype for us to establish an MRmediated quantum interface between the optical photon and MW photon, and utilizing which, people can carry out the important quantum target, i.e. reciprocal or non-reciprocal quantum state transfer, QPM, quantum manipulation, et al [58][59][60][61][62][63][64][65] The basic idea of this work is originated from a very simple mathematical result, namely (Δx) 1/n ? Δx as long as 0 < Δx = 1 and n > 1.…”

Section: Introductionmentioning

confidence: 99%

Quantum sensing proposal using a hybrid optomechanical system

Han¹,

Zhou²,

Wang³

et al. 2022

Jpn. J. Appl. Phys.

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Optomechanical system develops a significant breakthrough in quantum science area, especially it can further improve the precision and sensitivity of the measurement in quantum region. We here study a feasible optomechanical proposal in a hybrid quantum system, which can ensure a quantum sensor with a further enhanced sensitivity. With the joint assistance of microwave (MW) modifying and optical parametric amplification (OPA), the effective line width of this supermode is further reduced around the critical point, and it can therefore results in a resolvable spectrum to display a much weaker mechanical frequency shift, which is perhaps induced by a tiny mass or charged particles in this system. We also hope there might be some useful applications for this attempt in the area of quantum measurement.

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“…Moreover, during the last years, several contributions in optics have demonstrated different FB properties considering diverse lattice configurations 31 – 39 and, thus, FB systems have emerged as a well-established and relevant research area where to continue asking/solving questions about the improvement or modification of fundamental properties in very different physical contexts; namely, electronic systems, magnetic lattices, metamaterials, mechanical lattices, quantum configurations, photonics, etc. 40 – 49 .…”

Section: Introductionmentioning

confidence: 99%

Strain induced localization to delocalization transition on a Lieb photonic ribbon lattice

Román-Cortés

Fadic

Cid-Lara

et al. 2021

Sci Rep

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Ribbon lattices are kind of transition systems in between one and two dimensions, and their study is crucial to understand the origin of different emerging properties. In this work, we study a Lieb ribbon lattice and the localization–delocalization transition occurring due to a reduction of lattice distances (compression) and the corresponding flat band deformation. We observe how above a critical compression ratio the energy spreads out and propagates freely across the lattice, therefore transforming the system from being a kind of insulator into a conductor. We implement an experiment on a photonic platform and show an excellent agreement with the predicted phenomenology. Our findings suggest and prove experimentally the use of compression or mechanical deformation of lattices to switch the transport properties of a given system.

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Interplay of quantum phase transition and flat band in hybrid lattices

Cited by 13 publications

References 73 publications

Distinctive class of dissipation-induced phase transitions and their universal characteristics

Distinctive class of dissipation-induced phase transitions and their universal characteristics

Quantum sensing proposal using a hybrid optomechanical system

Strain induced localization to delocalization transition on a Lieb photonic ribbon lattice

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