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Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices (2018)
Journal Article
Lesanovsky, I., Macieszczak, K., & Garrahan, J. P. (2018). Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices. Quantum Science and Technology, 4(2), https://doi.org/10.1088/2058-9565/aaf831

We introduce a discrete-time quantum dynamics on a two-dimensional lattice that describes the evolution of a $1+1$-dimensional spin system. The underlying quantum map is constructed such that the reduced state at each time step is separable. We show... Read More about Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices.

Singularities in large deviations of work in quantum quenches (2018)
Journal Article
Rotondo, P., Minář, J., Garrahan, J. P., Lesanovsky, I., & Marcuzzi, M. (2018). Singularities in large deviations of work in quantum quenches. Physical Review B, 98(18), Article 184303. https://doi.org/10.1103/physrevb.98.184303

We investigate large deviations of the work performed in a quantum quench across two different phases separated by a quantum critical point, using as an example the Dicke model quenched from its superradiant to its normal phase. We extract the distri... Read More about Singularities in large deviations of work in quantum quenches.

Current fluctuations in boundary-driven quantum spin chains (2018)
Journal Article
Carollo, F., Garrahan, J. P., & Lesanovsky, I. (2018). Current fluctuations in boundary-driven quantum spin chains. Physical Review B, 98(9), 1-9. https://doi.org/10.1103/physrevb.98.094301

Boundary-driven quantum spin chains are paradigmatic nonequilibrium systems featuring the presence of particle currents. In general, it may not be possible to distinguish an incoherent type of particle transport from a truly quantum coherent one thro... Read More about Current fluctuations in boundary-driven quantum spin chains.

A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour (2018)
Journal Article
Wade, C., Marcuzzi, M., Levi, E., Kondo, J., Lesanovsky, I., Adams, C., & Weatherill, K. (2018). A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour. Nature Communications, 9, 1-7. https://doi.org/10.1038/s41467-018-05597-4

There are few demonstrated examples of phase transitions that may be driven directly by terahertz frequency electric fields, and those that are known require field strengths exceeding 1 MV cm?1. Here we report a non-equilibrium phase transition drive... Read More about A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour.

Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases (2018)
Journal Article
Pérez-Espigares, C., Lesanovsky, I., Garrahan, J. P., & Gutiérrez, R. (2018). Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases. Physical Review A, 98(2), https://doi.org/10.1103/physreva.98.021804

The physics of highly excited Rydberg atoms is governed by blockade or exclusion interactions that hinder the excitation of atoms in the proximity of a previously excited one. This leads to cooperative effects and a relaxation dynamics displaying spa... Read More about Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases.

Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers (2018)
Journal Article
Kerfoot, J., Korolkov, V. V., Nizovtsev, A. S., Jones, R., Taniguchi, T., Watanabe, K., …Beton, P. H. (2018). Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers. Journal of Chemical Physics, 149(5), Article 054701. https://doi.org/10.1063/1.5041418

We have investigated the influence of the substrate on the fluorescence of adsorbed organic molecules. Monolayer films of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI), a supramolecular network formed from PTCDI and melamine, and perylen... Read More about Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers.

Making rare events typical in Markovian open quantum systems (2018)
Journal Article
Carollo, F., Garrahan, J. P., Lesanovsky, I., & Pérez-Espigares, C. (2018). Making rare events typical in Markovian open quantum systems. Physical Review A, 98(1), Article 010103. https://doi.org/10.1103/physreva.98.010103

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 nonequilibrium systems. Rare dynamic... Read More about Making rare events typical in Markovian open quantum systems.

Dissipative many-body physics of cold Rydberg atoms (2018)
Journal Article
Morsch, O., & Lesanovsky, I. (2018). Dissipative many-body physics of cold Rydberg atoms. Rivista del Nuovo Cimento, 41(7), 383-414. https://doi.org/10.1393/ncr/i2018-10149-7

In the last twenty years, Rydberg atoms have become a versatile and much studied system for implementing quantum many-body systems in the framework of quantum computation and quantum simulation. However, even in the absence of coherent evolution Ryd... Read More about Dissipative many-body physics of cold Rydberg atoms.

Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces (2018)
Journal Article
Jones, R., Needham, J. A., Lesanovsky, I., Intravaia, F., & Olmos, B. (2018). Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces. Physical Review A, 97(5), Article 053841. https://doi.org/10.1103/PhysRevA.97.053841

We study how the radiative properties of a dense ensemble of atoms can be modified when they are placed near or between metallic or dielectric surfaces. If the average separation between the atoms is comparable or smaller than the wavelength of the s... Read More about Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces.

Many-body kinetics of dynamic nuclear polarization by the cross effect (2018)
Journal Article
Karabanov, A., Wiśniewski, D., Raimondi, F., Lesanovsky, I., & Köckenberger, W. (in press). Many-body kinetics of dynamic nuclear polarization by the cross effect. Physical Review A, 97(3), https://doi.org/10.1103/PhysRevA.97.031404

Dynamic nuclear polarization (DNP) is an out-of-equilibrium method for generating nonthermal spin polarization which provides large signal enhancements in modern diagnostic methods based on nuclear magnetic resonance. A particular instance is cross-e... Read More about Many-body kinetics of dynamic nuclear polarization by the cross effect.

Open quantum generalisation of Hopfield neural networks (2018)
Journal Article
Rotondo, P., Marcuzzi, M., Garrahan, J. P., Lesanovsky, I., & Müller, M. (2018). Open quantum generalisation of Hopfield neural networks. Journal of Physics A: Mathematical and Theoretical, 51(11), Article 115301. https://doi.org/10.1088/1751-8121/aaabcb

We propose a new framework to understand how quantum effects may impact on the dynamics of neural networks. We implement the dynamics of neural networks in terms of Markovian open quantum systems, which allows us to treat thermal and quantum coherent... Read More about Open quantum generalisation of Hopfield neural networks.

Devil's staircases without particle-hole symmetry (2018)
Journal Article
Lan, Z., Lesanovsky, I., & Li, W. (2018). Devil's staircases without particle-hole symmetry. Physical Review B, 97, https://doi.org/10.1103/PhysRevB.97.075117

We present and analyze spin models with long-range interactions whose ground state features a so-called devil’s staircase and where plateaus of the staircase are accessed by varying two-body interactions. This is in contrast to the canonical devil’s... Read More about Devil's staircases without particle-hole symmetry.

Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes (2018)
Journal Article
Gribben, D., Lesanovsky, I., & Gutierrez, R. (in press). Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes. Physical Review A, 97(1), https://doi.org/10.1103/PhysRevA.97.011603

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 lowdimensional lattices following a quench, i.e., a sudden change of par... Read More about Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes.

Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms (2017)
Journal Article
Ostmann, M., Minář, J., Marcuzzi, M., Levi, E., & Lesanovsky, I. (2017). Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms. New Journal of Physics, 19(12), https://doi.org/10.1088/1367-2630/aa983e

Motivated by recent progress in the experimental manipulation of cold atoms in optical lattices, we study three different protocols for non-adiabatic quantum state preparation and state transport in chains of Rydberg atoms. The protocols we discuss a... Read More about Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms.

Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains (2017)
Journal Article
Carollo, F., Garrahan, J. P., Lesanovsky, I., & Pérez-Espigares, C. (2017). Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains. Physical Review E, 96(5), Article 052118. https://doi.org/10.1103/PhysRevE.96.052118

We consider a class of either fermionic or bosonic non-interacting open quantum chains driven by dissipative interactions at the boundaries and study the interplay of coherent transport and dissipative processes, such as bulk dephasing and diffusion.... Read More about Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains.

Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems (2017)
Journal Article
Macieszczak, K., Zhou, Y., Hofferberth, S., Garrahan, J. P., Li, W., & Lesanovsky, I. (2017). Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems. Physical Review A, 96(4), Article 043860. https://doi.org/10.1103/PhysRevA.96.043860

We investigate the dynamics of a generic interacting many-body system under conditions of electromagnetically induced transparency (EIT). This problem is of current relevance due to its connection to non-linear optical media realized by Rydberg atoms... Read More about Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems.

Phase transitions in electron spin resonance under continuous microwave driving (2017)
Journal Article
Karabanov, A., Rose, D. C., Köckenberger, W., Garrahan, J. P., & Lesanovsky, I. (in press). Phase transitions in electron spin resonance under continuous microwave driving. Physical Review Letters, 119, https://doi.org/10.1103/PhysRevLett.119.150402

We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized non-equilibrium states in nuclear magnetic resonance. We... Read More about Phase transitions in electron spin resonance under continuous microwave driving.

Topological properties of a dense atomic lattice gas (2017)
Journal Article
Bettles, R. J., Minář, J., Adams, C. S., Lesanovsky, I., & Olmos, B. (2017). Topological properties of a dense atomic lattice gas. Physical Review A, 96(4), Article 041603. https://doi.org/10.1103/PhysRevA.96.041603

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 be... Read More about Topological properties of a dense atomic lattice gas.

Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system (2017)
Journal Article
Gutiérrez, R., Simonelli, C., Archimi, M., Castellucci, F., Arimondo, E., Ciampini, D., …Morsch, O. (2017). Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system. Physical Review A, 96(4), Article 041602(R). https://doi.org/10.1103/PhysRevA.96.041602

Understanding and probing phase transitions in non-equilibrium systems is an ongoing challenge in physics. A particular instance are phase transitions that occur between a non-fluctuating absorbing phase, e.g., an extinct population, and one in which... Read More about Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system.