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Entanglement Growth and Minimal Membranes in Random Unitary Circuits
Piotr Sierant, Marco Schirò, Maciej Lewenstein +1
Understanding the nature of entanglement growth in many-body systems is one of the fundamental questions in quantum physics. Here, we study this problem by characterizing the entan…
Preface: Characterisation of Physical Processes from Anomalous Diffusion Data
Carlo Manzo, Gorka Muñoz-Gil, Giovanni Volpe +3
Preface to the special issue "Characterisation of Physical Processes from Anomalous Diffusion Data" associated with the Anomalous Diffusion Challenge ( https://andi-challenge.org )…
Measurement-induced phase transitions in -dimensional stabilizer circuits
Piotr Sierant, Marco Schirò, Maciej Lewenstein +1
The interplay between unitary dynamics and local quantum measurements results in unconventional non-unitary dynamical phases and transitions. In this paper we investigate the dynam…
Unsupervised learning of anomalous diffusion data
Gorka Muñoz-Gil, Guillem Guigó i Corominas, Maciej Lewenstein
The characterization of diffusion processes is a keystone in our understanding of a variety of physical phenomena. Many of these deviate from Brownian motion, giving rise to anomal…
Efficient training of energy-based models via spin-glass control
Alejandro Pozas-Kerstjens, Gorka Muñoz-Gil, Eloy Piñol +4
We introduce a new family of energy-based probabilistic graphical models for efficient unsupervised learning. Its definition is motivated by the control of the spin-glass propertie…
Confinement and lack of thermalization after quenches in the bosonic Schwinger model
Titas Chanda, Jakub Zakrzewski, Maciej Lewenstein +1
We excite the vacuum of a relativistic theory of bosons coupled to a gauge field in 1+1 dimensions (bosonic Schwinger model) out of equilibrium by creating a spatially separ…
Machine learning method for single trajectory characterization
Gorka Muñoz-Gil, Miguel Angel Garcia-March, Carlo Manzo +2
In order to study transport in complex environments, it is extremely important to determine the physical mechanism underlying diffusion, and precisely characterize its nature and p…
Diffusion through a network of compartments separated by partially-transmitting boundaries
Gorka Muñoz-Gil, Miguel Angel García-March, Carlo Manzo +2
We study the random walk of a particle in a compartmentalized environment, as realized in biological samples or solid state compounds. Each compartment is characterized by its leng…
Characterizing the quantum field theory vacuum using temporal Matrix Product states
Emanuele Tirrito, Neil J. Robinson, Maciej Lewenstein +2
In this paper we construct the continuous Matrix Product State (MPS) representation of the vacuum of the field theory corresponding to the continuous limit of an Ising model. We do…
On the Small Mass Limit of Quantum Brownian Motion with Inhomogeneous Damping and Diffusion
Soon Hoe Lim, Jan Wehr, Aniello Lampo +2
We study the small mass limit (or: the Smoluchowski-Kramers limit) of a class of quantum Brownian motions with inhomogeneous damping and diffusion. For Ohmic bath spectral density…
Transient subdiffusion from an Ising environment
G. Muñoz-Gil, C. Charalambous, M. A. García-March +4
We introduce a model, in which a particle performs a continuous time random walk (CTRW) coupled to an environment with Ising dynamics. The particle shows locally varying diffusivit…
Percolation thresholds for discrete-continuous models with non-uniform probabilities of bond formation
Bartłomiej Szczygieł, Marek Dudyński, Kamil Kwiatkowski +3
We consider a family of percolation models in which geometry and connectivity are defined by two independent random processes. Such models merge characteristics of discrete and con…
Quantum simulation of an extra dimension
O. Boada, A. Celi, M. Lewenstein +1
We present a general strategy to simulate a D+1-dimensional quantum system using a D-dimensional one. We analyze in detail a feasible implementation of our scheme using optical lat…
Entanglement Spectrum, Critical Exponents and Order Parameters in Quantum Spin Chains
G. De Chiara, L. Lepori, M. Lewenstein +1
We investigate the entanglement spectrum near criticality in finite quantum spin chains. Using finite size scaling we show that when approaching a quantum phase transition, the Sch…
Quantum Phases of Cold Polar Molecules in 2D Optical Lattices
B. Capogrosso-Sansone, C. Trefzger, M. Lewenstein +2
We discuss the quantum phases of hard-core bosons on a two-dimensional square lattice interacting via repulsive dipole-dipole interactions, as realizable with polar molecules trapp…
Dynamics of dark solitons in elongated Bose-Einstein condensates
A. E. Muryshev, G. V. Shlyapnikov, W. Ertmer +2
We find two types of moving dark soliton textures in elongated Bose-Einstein condensates: non-stationary kinks and proper dark solitons. The former have a curved notch region and r…
Observation of Phase Fluctuations in Bose-Einstein Condensates
S. Dettmer, D. Hellweg, P. Ryytty +8
The occurrence of phase fluctuations due to thermal excitations in Bose-Einstein condensates (BECs) is studied for a variety of temperatures and trap geometries. We observe the sta…
Optical Generation of Vortices in trapped Bose-Einstein Condensates
L. Dobrek, M. Gajda, M. Lewenstein +3
We demonstrate numerically the efficient generation of vortices in Bose-Einstein condensates (BEC) by using a ``phase imprinting'' method. The method consist of passing a far off r…