Quantum-Zeno Fermi polaron in the strong dissipation limit

Wasak, Tomasz; Schmidt, Richard; Piazza, Francesco

doi:10.1103/physrevresearch.3.013086

Cited by 18 publications

(14 citation statements)

References 57 publications

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“…The formalism that we employ in this work closely follows the one developed in Ref. [34]. In short, the Keldysh action consist of three terms corresponding to excitons, electrons and their interaction, i.e.,…”

Section: Non-equilibrium Qftmentioning

confidence: 99%

“…Residual interactions between exciton-polarons mediated by the itinerant electrons can cause strong optical nonlinearities with an effective strength largely exceeding the direct interaction between the tightly bound excitons [31,32]. Besides its relevance for nonlinear optics, polaron formation can induce intriguing collective phenomena both in [33] and out of equilibrium [34,35].…”

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confidence: 99%

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Fermi polaron laser in two-dimensional semiconductors

Wasak¹,

Pientka²,

Piazza³

2021

Preprint

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We study the relaxation dynamics of driven, two-dimensional semiconductors, where itinerant electrons dress optically pumped excitons to form two Fermi-polaron branches. Repulsive polarons excited around zero momentum quickly decay to the attractive branch at high momentum. Collisions with electrons subsequently lead to a slower relaxation of attractive polarons, which accumulate at the edge of the light-cone around zero momentum where the radiative loss dominates. The bosonic nature of exciton polarons enables stimulated scattering, which results in a lasing transition at higher pump power. The latter is characterized by a superlinear increase of light emission as well as extended spatiotemporal coherence. The many-body dressing of excitons can reduce the emission linewidth below the bare exciton linewidth set by nonradiative loss.

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Section: Non-equilibrium Qftmentioning

confidence: 99%

mentioning

confidence: 99%

Fermi polaron laser in two-dimensional semiconductors

Wasak¹,

Pientka²,

Piazza³

2021

Preprint

Self Cite

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show abstract

“…In the first case, this has led to the observation of the celebrated quantum Zeno effect (QZE) [16,17], where the effective dissipation decreases as the loss rate is increased [12,[18][19][20][21][22]. In recent years, the interest around these many-body versions of the QZE has grown [23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Steady-State Quantum Zeno Effect of Driven-Dissipative Bosons with Dynamical Mean-Field Theory

Seclì,

Capone,

Schirò

2022

Preprint

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We study a driven-dissipative Bose-Hubbard model in presence of two-particle losses and an incoherent single-particle drive on each lattice site, leading to a finite-density stationary state. Using dynamical mean-field theory (DMFT) and an impurity solver based on exact diagonalization of the associated Lindbladian, we investigate the regime of strong two-particle losses. Here, a stationarystate quantum Zeno effect emerges, as can be seen in the on-site occupation and spectral function. We show that DMFT captures this effect through its self-consistent bath. We show that, in the deep Zeno regime, the bath structure simplifies, with the occupation of all bath sites except one becoming exponentially suppressed. As a result, an effective dissipative hard-core Bose-Hubbard dimer model emerges, where the auxiliary bath site has single-particle dissipation controlled by the Zeno dissipative scale.

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“…Further theoretical investigation unveiled novel effects related to the interplay between localized losses and coherent Hamiltonian dynamics, including the many-body QZE 30,31 , dynamical phase transitions [32][33][34][35][36] , orthogonality catastro-phe 37,38 , and the engineering of exotic nonequilibrium steady states [39][40][41][42][43][44][45][46][47][48] . Moreover, the quantum Zeno effect has been analyzed also for mobile impurities 49 as well as for dephasing impurities 50,51 .…”

Section: Introductionmentioning

confidence: 99%

Shape effects of localized losses in quantum wires: dissipative resonances and nonequilibrium universality

Müller,

Gievers,

Fröml

et al. 2021

Preprint

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We study the effects of the spacial structure of localized losses in weakly-interacting fermionic quantum wires. We show that multiple dissipative impurities give rise to resonant effects visible in the transport properties and the particles' momentum distribution. These resonances can enhance or suppress the effective particle losses in the wire. Moreover, we investigate the interplay between interactions and the impurity shape and find that, differently from the coherent scatterer case, the impurity shape modifies the scaling of the scattering probabilities close to the Fermi momentum. We show that, while the fluctuation-induced quantum Zeno effect is robust against the shape of the impurities, the fluctuation-induced transparency is lifted continuously. This is reflected in the emergence of a continuous line of fixed points in the renormalization group flow of the scattering probabilities.

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Quantum-Zeno Fermi polaron in the strong dissipation limit

Cited by 18 publications

References 57 publications

Fermi polaron laser in two-dimensional semiconductors

Fermi polaron laser in two-dimensional semiconductors

Steady-State Quantum Zeno Effect of Driven-Dissipative Bosons with Dynamical Mean-Field Theory

Shape effects of localized losses in quantum wires: dissipative resonances and nonequilibrium universality

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