Bistability Versus Metastability in Driven Dissipative Rydberg Gases

  title={Bistability Versus Metastability in Driven Dissipative Rydberg Gases},
  author={Fabian Letscher and Oliver Thomas and Thomas Niederprum and Michael Fleischhauer and Herwig Ott},
  journal={Physical Review X},
When an ensemble of atoms interacts with an environment, it's possible that two steady states can coexist---a bistable state. A new experiment investigates this possibility in a sample of Rydberg atoms and finds that, in large systems, many excitations exist that are incompatible with a bistable state. 

Controlling excitation avalanches in driven Rydberg gases

Recent experiments with strongly interacting, driven Rydberg ensembles have introduced a promising setup for the study of self-organized criticality (SOC) in cold atom systems. Based on this setup,

Spontaneous freezing in driven-dissipative quantum systems

Attaining a deeper knowledge of critical non-equilibrium phenomena is a standing challenge in the fields of open quantum systems and many-body physics. For instance, a comprehensive understanding of

Metastability and avalanche dynamics in strongly correlated gases with long-range interactions

It is argued that a density modulation, initially forming in the compressible surface of the trapped gas, triggers an avalanche tunneling process in the Mott-insulating region, and originates in the competition between short- and global-range interactions.

Experimental observation of a dissipative phase transition in a multi-mode many-body quantum system

Dissipative phase transitions are a characteristic feature of open systems. One of the paradigmatic examples for a first order dissipative phase transition is the driven nonlinear single-mode optical

Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system

  • C. SimonelliM. Archimi O. Morsch
  • Physics
    2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
  • 2017
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

Multistability of Driven-Dissipative Quantum Spins.

An efficient scheme accounting for the corrections to mean field by correlations at leading order is introduced, and this scheme is benchmarked using high-precision numerics based on matrix-product operators in one- and two-dimensional lattices.

Few-Mode Geometric Description of a Driven-Dissipative Phase Transition in an Open Quantum System.

By example of the nonlinear Kerr mode driven by a laser, we show that hysteresis phenomena in systems featuring a driven-dissipative phase transition can be accurately described in terms of just two

Phase Diagram and Self-Organizing Dynamics in a Thermal Ensemble of Strongly Interacting Rydberg Atoms

Far-from-equilibrium dynamics that lead to self-organization are highly relevant to complex dynamical systems not only in physics but also in life, earth, and social sciences. However, it is

Emerging Dissipative Phases in a Superradiant Quantum Gas with Tunable Decay

Exposing a many-body system to external drives and losses can transform the nature of its phases and opens perspectives for engineering new properties of matter. How such characteristics are related

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

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



Spatial correlations of one dimensional driven-dissipative systems of Rydberg atoms

We consider a one-dimensional lattice of atoms with laser excitation to a Rydberg state and spontaneous emission. The atoms are coupled due to the dipole-dipole interaction of the Rydberg states.

Mesoscopic Rydberg-blockaded ensembles in the superatom regime and beyond

To gain insight into the properties of quantum matter, a superatom—an ensemble of strongly interacting atoms in the Rydberg blockade regime—is created and characterized by precisely controlling the

Beyond mean-field bistability in driven-dissipative lattices: bunching-antibunching transition and quantum simulation

In the present work we investigate the existence of multiple nonequilibrium steady states in a coherently driven $XY$ lattice of dissipative two-level systems. A commonly used mean-field ansatz, in

Collective quantum jumps of Rydberg atoms.

This work explains how entanglement and quantum measurement enable the jumps, which are otherwise classically forbidden, in an open quantum system of atoms with a long-range Rydberg interaction, laser driving, and spontaneous emission.

Intrinsic optical bistability in a strongly driven Rydberg ensemble

We observe and characterize intrinsic optical bistability in a dilute Rydberg vapor. The bistability is characterized by sharp jumps between states of low and high Rydberg occupancy with jump-up and

Kinetic constraints, hierarchical relaxation, and onset of glassiness in strongly interacting and dissipative Rydberg gases.

The collective behavior of cold atomic and molecular ensembles can be similar to that found in soft condensed-matter systems, and the evolution towards equilibrium in one and two dimensions is studied.

Driven-dissipative many-body systems with mixed power-law interactions: Bistabilities and temperature-driven nonequilibrium phase transitions

We investigate the nonequilibrium dynamics of a driven-dissipative spin ensemble with competing power-law interactions. We demonstrate that dynamical phase transitions as well as bistabilities can

Steady-state crystallization of Rydberg excitations in an optically driven lattice gas

We study the conditions for attaining crystalline order in the stationary state of a continuously driven, open many-body system. Specifically, we consider resonant optical excitations of atoms in a

Antiferromagnetic long-range order in dissipative Rydberg lattices

We study the dynamics of dissipative spin lattices with power-law interactions, realized via few-level atoms driven by coherent laser-coupling and decoherence processes. Using Monte-Carlo

Full counting statistics and phase diagram of a dissipative Rydberg gas.

The realization of a dissipative gas of rubidium Rydberg atoms is reported and the measurement of its full counting statistics and phase diagram for both resonant and off-resonant excitation are measured.