Entanglement generation in $(1+1)D$ QED scattering processes

Rigobello, Marco; Notarnicola, Simone; Magnifico, Giuseppe; Montangero, Simone

doi:10.48550/arxiv.2105.03445

Cited by 8 publications

(14 citation statements)

References 94 publications

(145 reference statements)

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“…Confinement strongly affects the relaxation dynamics of the system, leading to unconventional spreading of correlations and slow entanglement growth [19][20][21]. A key feature of the model is the long lifetime of mesons, ascribed to a strong suppression of the Schwinger mechanism [22][23][24][25][26][27], which creates new quarks from the energy stored in the confining force and viceversa. Hence, except for some fine-tuned regimes [28][29][30], mesons are stable excitations.…”

mentioning

confidence: 99%

Prethermalization in one-dimensional quantum many-body systems with confinement

Birnkammer¹,

Bastianello²,

Knap³

2022

Preprint

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Unconventional nonequilibrium phases with restricted correlation spreading and slow entanglement growth have been proposed to emerge in systems with confined excitations, calling their thermalization dynamics into question. Here, we investigate the many-body dynamics of a confined Ising spin chain, in which domain walls in the ordered phase form bound states reminiscent of mesons. We show that the thermalization dynamics after a quantum quench exhibits multiple stages with well separated time scales. The system first relaxes towards a prethermal state, described by a Gibbs ensemble with conserved meson number. The prethermal state arises from rare events in which mesons are created in close vicinity, leading to an avalanche of scattering events. Only at much later times a true thermal equilibrium is achieved in which the meson number conservation is violated by a mechanism akin to the Schwinger effect.

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confidence: 99%

Prethermalization in one-dimensional quantum many-body systems with confinement

Birnkammer¹,

Bastianello²,

Knap³

2022

Preprint

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“…In the ferromagnetic case, this immediately leads to confinement of fermionic domain walls into bosonic magnons [6][7][8][9]. Recent studies of the Ising chain in a tilted field concentrated on aspects of anomalously slow dynamics [10][11][12][13][14], quantum scarring [15,16], prethermalization [17], fractons [18], meson scattering [19,20] and dynamics of the false vacuum [21][22][23][24][25][26].…”

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confidence: 99%

Fragmentation and emergent integrable transport in the weakly tilted Ising chain

Bastianello,

Borla,

Moroz

2021

Preprint

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We investigate emergent quantum dynamics of the tilted Ising chain in the regime of a weak transverse field. Within the leading order perturbation theory, the Hilbert space is fragmented into exponentially many decoupled sectors. We find that the sector made of isolated magnons is integrable with dynamics being governed by a constrained version of the XXZ spin Hamiltonian. As a consequence, when initiated in this sector, the Ising chain exhibits ballistic transport on unexpectedly long times scales. We quantitatively describe its rich phenomenology employing exact integrable techniques such as Generalized Hydrodynamics. Finally, we initiate studies of integrability-breaking magnon clusters whose leading-order transport is activated by scattering with surrounding isolated magnons.

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“…The recent research program focusing on real time dynamical aspects of confinement has in itself lead to new discoveries, e.g. novel non-equilibrium phenomena with anomalously slow information spreading [11,[15][16][17][18][19] and false vacuum decay [20][21][22][23][24][25]. However, most of these studies focused essentially on single-meson physics and the interplay among mesons them-selves, or with other constituents, is yet to be fully addressed.…”

Section: Introduction-mentioning

confidence: 99%

“…First, the effect of a truly moving impurity has only been partially investigated and could lead to interesting phenomena arising from the interplay between the defect's velocity and the lightcone of the mesons [41][42][43]. Besides, the energy exchange between the impurity and the chain can alter the Schwinger effect [45] (see also [20][21][22][23][24][25]) by converting the impurity kinetic energy in a quark-antiquark pair on the false vacuum and spur thermalization. Another interesting scenario to be investigated is whether the impurity itself can be confined with a companion: when two mesons of different particle species scatter, each quark can act as the impurity for the other species, exciting four-quark (or more) mesonic particles.…”

Section: Introduction-mentioning

confidence: 99%

Confinement induced impurity states in spin chains

Vovrosh,

Zhao,

Knolle

et al. 2021

Preprint

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Quantum simulators hold the promise of probing central questions of high-energy physics in tunable condensed matter platforms, for instance the physics of confinement. Local defects can be an obstacle in these setups harming their simulation capabilities. However, defects in the form of impurities can also be useful as probes of many-body correlations and may lead to fascinating new phenomena themselves. Here, we investigate the interplay between impurity and confinement physics in a basic spin chain setup, showing the emergence of new exotic excitations as impurity-meson bound states with a long lifetime. For weak confinement, semiclassical approximations can describe the capture process in a meson-impurity scattering event. In the strong-confining regime, intrinsic quantum effects are visible through the quantization of the emergent bound state energies which can be readily probed in quantum simulators.

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Entanglement generation in $(1+1)D$ QED scattering processes

Cited by 8 publications

References 94 publications

Prethermalization in one-dimensional quantum many-body systems with confinement

Prethermalization in one-dimensional quantum many-body systems with confinement

Fragmentation and emergent integrable transport in the weakly tilted Ising chain

Confinement induced impurity states in spin chains

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