Ferromagnetism in an Extended Coherently Coupled Atomic Superfluid

Cominotti, Riccardo; Berti, Anna; Clement, Dulin,; Rogora, Chiara; Lamporesi, Giacomo; Carusotto, Iacopo; Recati, Alessio; Zenesini, Alessandro; Ferrari, G.

doi:10.1103/physrevx.13.021037

Cited by 5 publications

(1 citation statement)

References 41 publications

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“…Although the FVD decay in spin-chains have not been currently observed experimentally, trapped ion experiments can already study non-integrable dynamics of meson confinement [61]. Another potential platform for studying the FVD is the two-component Bose-Einstein condensates [62][63][64][65]. There the spin-degrees of freedom act as a quantum Ising model, but with the added benefit of the long coherence time provided by condensates.…”

Section: Discussionmentioning

confidence: 99%

Monte Carlo matrix-product-state approach to the false vacuum decay in the monitored quantum Ising chain

Maki,

Berti,

Carusotto

et al. 2023

SciPost Phys.

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In this work we characterize the false vacuum decay in the ferromagnetic quantum Ising chain with a weak longitudinal field subject to continuous monitoring of the local magnetization. Initializing the system in a metastable state, the false vacuum, we study the competition between coherent dynamics, which tends to create resonant bubbles of the true vacuum, and measurements which induce heating and reduce the amount of quantum correlations. To this end we exploit a numerical approach based on the combination of matrix product states with stochastic quantum trajectories which allows for the simulation of the trajectory-resolved non-equilibrium dynamics of interacting many-body systems in the presence of continuous measurements. We show how the presence of measurements affects the false vacuum decay: At short times the departure from the local minimum is accelerated while at long times the system thermalizes to an infinite-temperature incoherent mixture. For large measurement rates the system enters a quantum Zeno regime. The false vacuum decay and the thermalization physics are characterized in terms of the magnetization, connected correlation function, and the trajectory-resolved entanglement entropy.

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Section: Discussionmentioning

confidence: 99%