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Rydberg soft matter

Rydberg soft matter
Contract (GA) number
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University of Nottingham
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  • Front propagation versus bulk relaxation in the annealing dynamics of a kinetically constrained model of ultrastable glasses

    Gutierrez, Ricardo; Garrahan, Juan P. (2016)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1)
    Glasses prepared by physical vapour deposition have been shown to be remarkably more stable than those prepared by standard cooling protocols, with properties that appear to be similar to systems aged for extremely long times. When subjected to a rapid rise in temperature, ultrastable glasses anneal towards the liquid in a qualitatively different manner than ordinary glasses, with the seeming competition of different timescales and lengthscales. We numerically reproduce the phenomenology of u...

    Supersolidity of lattice bosons immersed in strongly correlated Rydberg dressed atoms

    Li, Yongqiang; Geiβler, Andreas; Hofstetter, Walter; Li, Weibin (2018)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1)
    Recent experiments have illustrated that long range two-body interactions can be induced by laser coupling atoms to highly excited Rydberg states. Stimulated by this achievement, we study supersolidity of lattice bosons in an experimentally relevant situation. In our setup, we consider two-component atoms on a square lattice, where one species is weakly dressed to an electronically high-lying (Rydberg) state, generating a tunable, soft-core shape long-range interaction. Interactions between a...

    Unified thermodynamic uncertainty relations in linear response

    Macieszczak, Katarzyna; Brandner, Kay; Garrahan, Juan P. (2018)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1)
    Thermodynamic uncertainty relations (TURs) refer to recently established relations between the relative uncertainty of time-integrated currents and entropy production in non-equilibrium systems. For small perturbations away from equilibrium, linear response (LR) theory provides the natural framework to study generic non-equilibrium processes. Here we use LR to derive TURs in a straightforward and unified way. Our approach allows to generalise TURs to systems without local time-reversal symmet...

    Role of interactions in a dissipative many-body localized system

    Everest, Benjamin; Lesanovsky, Igor; Garrahan, Juan P.; Levi, Emanuele (2016)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1), EC | ESCQUMA (335266)
    Recent experimental and theoretical efforts have focused on the effect of dissipation on quantum many-body systems in their many-body localized (MBL) phase. While in the presence of dephasing noise such systems reach a unique ergodic state, their dynamics is characterized by slow relaxation manifested in non-exponential decay of self-correlations. Here we shed light on a currently much debated issue, namely the role of interactions for this relaxation dynamics. We focus on the experimentally ...

    Making rare events typical in Markovian open quantum systems

    Carollo, Federico; Garrahan, Juan P.; Lesanovsky, Igor; Pérez-Espigares, Carlos (2017)
    Projects: EC | ESCQUMA (335266), RCUK | Rydberg soft matter (EP/M014266/1)
    Large dynamical fluctuations - atypical realizations of the dynamics sustained over long periods of time - can play a fundamental role in determining the properties of collective behavior of both classical and quantum non-equilibrium systems. Rare dynamical fluctuations, however, occur with a probability that often decays exponentially in their time extent, thus making them difficult to be directly observed and exploited in experiments. Here, using methods from dynamical large deviations, we ...

    Current fluctuations in boundary-driven quantum spin chains

    Carollo, Federico; Garrahan, Juan P.; Lesanovsky, Igor (2018)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1), EC | ESCQUMA (335266)
    Boundary-driven spin chains are paradigmatic non-equilibrium systems in both classical and quantum settings. In general it may not be possible to distinguish classical from quantum transport through monitoring the mean current, as both ballistic as well as diffusive regimes occur in either setting. Here we show that genuine quantum features become manifest in large fluctuations which allow a discrimination between classical and quantum transport: in the classical case, realizations that are c...

    Topological properties of a dense atomic lattice gas.

    Bettles, Robert J.; Minář, Jiří; Adams, Charles S.; Lesanovsky, Igor; Olmos, Beatriz (2017)
    Projects: EC | ESCQUMA (335266), EC | RYSQ (640378), RCUK | Rydberg soft matter (EP/M014266/1), RCUK | Cooperative quantum optics in dense thermal vapours (EP/L023024/1)
    We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a non-trivial coherent long-range exchange interaction whose form goes beyond a simple power-law. The far-field terms of the potential -- which are particularly relevant for atomic separations comparable to the atomic transition wavelength -- can give rise to energy spectra with one-sided divergences in the Brillouin z...

    Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes

    Gribben, Dominic; Lesanovsky, Igor; Gutierrez, Ricardo (2018)
    Projects: EC | ESCQUMA (335266), EC | RYSQ (640378), RCUK | Rydberg soft matter (EP/M014266/1)
    Understanding the non-equilibrium behavior of quantum systems is a major goal of contemporary physics. Much research is currently focused on the dynamics of many-body systems in low-dimensional lattices following a quench, i.e., a sudden change of parameters. Already such a simple setting poses substantial theoretical challenges for the investigation of the real-time post-quench quantum dynamics. In classical many-body systems the Kolmogorov-Mehl-Johnson-Avrami model describes the phase trans...

    Epidemic Dynamics in Open Quantum Spin Systems

    Pérez-Espigares, Carlos; Marcuzzi, Matteo; Gutiérrez, Ricardo; Lesanovsky, Igor (2017)
    Projects: EC | RYSQ (640378), EC | ESCQUMA (335266), RCUK | Rydberg soft matter (EP/M014266/1)
    We explore the non-equilibrium evolution and stationary states of an open many-body system which displays epidemic spreading dynamics in a classical and a quantum regime. Our study is motivated by recent experiments conducted in strongly interacting gases of highly excited Rydberg atoms where the facilitated excitation of Rydberg states competes with radiative decay. These systems approximately implement open quantum versions of models for population dynamics or disease spreading where specie...

    Synthetic lattices, flat bands and localization in Rydberg quantum simulators

    Ostmann, Maike; Marcuzzi, Matteo; Minar, Jiri; Lesanovsky, Igor (2018)
    Projects: EC | RYSQ (640378), EC | ESCQUMA (335266), RCUK | Rydberg soft matter (EP/M014266/1)
    The most recent manifestation of cold Rydberg atom quantum simulators that employs tailored optical tweezer arrays enables the study of many-body dynamics under so-called facilitation conditions. We show how the facilitation mechanism yields a Hilbert space structure in which the many-body states organize into synthetic lattices, which feature in general one or several flat bands and may support immobile localized states. We focus our discussion on the case of a ladder lattice geometry for wh...
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