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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...

    Robust Rydberg gate via Landau-Zener control of F\"orster resonance

    Huang, Xi-Rong; Ding, Zong-Xing; Hu, Chang-Sheng; Shen, Li-Tuo; Li, Weibin; Wu, Huaizhi; Zheng, Shi-Biao (2018)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1)
    In this paper, we propose a scheme to implement the two-qubit controlled-Z gate via the Stark-tuned F\"orster interaction of Rydberg atoms, where the F\"orster defect is driven by a time-dependent electric field of a simple sinusoidal function while dipole-dipole interactions are time-independent. It is shown that when the system is initially in a specific state, it makes a cyclic evolution after a preset interaction time, returning to the initial state, but picks up a phase, which can be use...

    Current fluctuations in boundary-driven quantum spin chains

    Carollo, Federico; Garrahan, Juan P.; Lesanovsky, Igor (2018)
    Projects: EC | ESCQUMA (335266), RCUK | Rydberg soft matter (EP/M014266/1)
    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...

    Role of interactions in a dissipative many-body localized system

    Everest, Benjamin; Lesanovsky, Igor; Garrahan, Juan P.; Levi, Emanuele (2016)
    Projects: EC | ESCQUMA (335266), RCUK | Rydberg soft matter (EP/M014266/1)
    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 ...

    Enhancing correlation times for edge spins through dissipation

    Vasiloiu, Loredana M.; Carollo, Federico; Garrahan, Juan P. (2018)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1), EC | ESCQUMA (335266)
    Spin chains with open boundaries, such as the transverse field Ising model, can display coherence times for edge spins that diverge with the system size as a consequence of almost conserved operators, the so-called strong zero modes. Here, we discuss the fate of these coherence times when the system is perturbed in two different ways. First, we consider the effects of a unitary coupling connecting the ends of the chain; when the coupling is weak and non-interacting, we observe stable long-liv...

    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 ...

    Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances

    Gorniaczyk, H.; Tresp, C.; Bienias, P.; Paris-Mandoki, A.; Li, Weibin; Mirgorodskiy, I.; Büchler, H. P.; Lesanovsky, Igor; Hofferberth, S. (2016)
    Projects: RCUK | Rydberg soft matter (EP/M014266/1), EC | ESCQUMA (335266), EC | RYSQ (640378)
    We demonstrate experimentally that Stark-tuned Förster resonances can be used to substantially increase the interaction between individual photons mediated by Rydberg interaction inside an optical medium. This technique is employed to boost the gain of a Rydberg-mediated single-photon transistor and to enhance the non-destructive detection of single Rydberg atoms. Furthermore, our all-optical detection scheme enables high-resolution spectroscopy of two-state Förster resonances, revealing the ...

    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...
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