Abstract
Disorder is everywhere in nature and it has a fundamental impact on the behavior of many quantum systems. The presence of a small amount of disorder, in fact, can dramatically change the coherence and transport properties of a system. Despite the growing interest in this topic, a complete understanding of the issue is still missing. An open question, for example, is the description of the interplay of disorder and interactions, which has been predicted to give rise to exotic states of matter such as quantum glasses or many-body localization. In this review, we will present an overview of experimental observations with disordered quantum gases, focused on one-dimensional bosons, and we will connect them with theoretical predictions.
Highlights
Thanks to the high degree of tunability of many important parameters, they have been used to study the low-temperature quantum phases and the transport properties of neutral particles with short-range interaction [4,5]. Their strong versatility allows researchers to use these platforms to investigate the physics of disorder [6,7,8], mainly using two different kinds of optical disordered potentials: laser speckles [9,10,11,12,13,14,15,16,17,18,19,20]
Starting from a 3D Bose–Einstein condensate (BEC), the atoms are typically loaded in a strong 2D optical lattice [55]
Along the 1D tubes, another optical lattice is employed to produce a set of disordered quasi-1D systems, which are described by the disordered Bose–Hubbard Hamiltonian in Equation (1)
Summary
Thanks to the high degree of tunability of many important parameters, they have been used to study the low-temperature quantum phases and the transport properties of neutral particles with short-range interaction [4,5]. Their strong versatility allows researchers to use these platforms to investigate the physics of disorder [6,7,8], mainly using two different kinds of optical disordered potentials: laser speckles [9,10,11,12,13,14,15,16,17,18,19,20].
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