Observation of many-body localization of interacting fermions in a quasirandom optical lattice

  title={Observation of many-body localization of interacting fermions in a quasirandom optical lattice},
  author={Michael Schreiber and Sean S. Hodgman and Pranjal Bordia and Henrik P. L{\"u}schen and Mark H. Fischer and Ronen Vosk and Ehud Altman and Ulrich Schneider and Immanuel Bloch},
  pages={842 - 845}
Making interacting atoms localize Disorder can stop the transport of noninteracting particles in its tracks. This phenomenon, known as Anderson localization, occurs in disordered solids, as well as photonic and cold atom settings. Interactions tend to make localization less likely, but disorder, interactions, and localization may coexist in the so-called many-body localized state. Schreiber et al. detect many-body localization in a one-dimensional optical lattice initially filled with atoms… 

Probing many-body localization with ultracold atoms in optical lattices

This thesis reports on first experiments on the observation of ergodicity breaking in a two-component, interacting fermionic gas of Potassium-40 subject to quasi-periodic optical lattices in one and

Few-boson localization in a continuum with speckle disorder

The disorder-induced localization of few bosons interacting via a contact potential is investigated through the analysis of the level-spacing statistics familiar from random matrix theory. The model

Many-body localization in a one-dimensional optical lattice with speckle disorder

The many-body localization transition for a Heisenberg spin chain with a speckle disorder is studied. Such a model is equivalent to a system of spinless fermions in an optical lattice with an

Disorder in order: localization in a randomless cold atom system

We present a mapping between the Edwards model of disorder describing the motion of a single particle subject to randomly-positioned static scatterers and the Bose polaron problem of a light quantum

Quasi-many-body localization of interacting fermions with long-range couplings

A number of experimental platforms for quantum simulations of disordered quantum matter, from dipolar systems to trapped ions, involve degrees of freedom which are coupled by power-law decaying

Many-body localization in a quantum simulator with programmable random disorder

Interacting quantum systems are expected to thermalize, but in some situations in the presence of disorder they can exist in localized states instead. This many-body localization is studied

Quantum order, entanglement and localization in many-body systems

The interplay of disorder and interactions can have remarkable effects on the physics of quantum systems. A striking example is provided by the long conjectured—and recently confirmed—phenomenon of

Observation of energy-resolved many-body localization

Many-body localization (MBL) describes a quantum phase where an isolated interacting system subject to sufficient disorder displays non-ergodic behaviour, evading thermal equilibrium that occurs

Doublon dynamics and polar molecule production in an optical lattice

The interplay of tunnelling and interaction of fermions and bosons provides a controllable platform to study Bose-Fermi Hubbard dynamics and the distribution of the atomic gases in the lattice is probed by measuring the inelastic loss of doublons.

Many-body localization of bosons in an optical lattice: Dynamics in disorder-free potentials

The phenomenon of Many-Body Stark Localization of bosons in tilted optical lattice is studied. Despite the fact that no disorder is necessary for Stark localization to occur, it is very similar to



Transport and Anderson localization in disordered two-dimensional photonic lattices

The experimental observation of Anderson localization in a perturbed periodic potential is reported: the transverse localization of light caused by random fluctuations on a two-dimensional photonic lattice, demonstrating how ballistic transport becomes diffusive in the presence of disorder, and that crossover to Anderson localization occurs at a higher level of disorder.

Three-dimensional localization of ultracold atoms in an optical disordered potential

In disordered media, quantum interference effects are expected to induce complete suppression of electron conduction. The phenomenon, known as Anderson localization, has a counterpart with classical

Many-body localization in a quasiperiodic system

Recent theoretical and numerical evidence suggests that localization can survive in disordered many-body systems with very high energy density, provided that interactions are sufficiently weak.

Disorder-induced localization in a strongly correlated atomic Hubbard gas.

This work observes the emergence of a disorder-induced insulating state in a strongly interacting atomic Fermi gas trapped in an optical lattice and measures localization that persists as the temperature of the gas is raised.

Direct observation of Anderson localization of matter waves in a controlled disorder

This work directly image the atomic density profiles as a function of time, and finds that weak disorder can stop the expansion and lead to the formation of a stationary, exponentially localized wavefunction—a direct signature of Anderson localization.

Unbounded growth of entanglement in models of many-body localization.

The significance for proposed atomic experiments is that local measurements will show a large but nonthermal entropy in the many-body localized state, which develops slowly over a diverging time scale as in glassy systems.

Nonequilibrium dynamics of bosonic atoms in optical lattices: Decoherence of many-body states due to spontaneous emission

We analyze in detail the heating of bosonic atoms in an optical lattice due to incoherent scattering of light from the lasers forming the lattice. Because atoms scattered into higher bands do not

Anomalous Expansion of Attractively Interacting Fermionic Atoms in an Optical Lattice

An isentropic effect in a spin mixture of attractively interacting fermionic atoms in an optical lattice is reported on, demonstrating the crucial role of the lattice potential in the thermodynamics of the fermionics Hubbard model.

Fermionic transport and out-of-equilibrium dynamics in a homogeneous Hubbard model with ultracold atoms

Transport properties are among the defining characteristics of many important phases in condensed-matter physics. In the presence of strong correlations they are difficult to predict, even for model