A Group-Equivariant Autoencoder for Identifying Spontaneously Broken Symmetries

1 code implementation • 13 Feb 2022 • Devanshu Agrawal, Adrian Del Maestro, Steven Johnston, James Ostrowski

We use group theory to deduce which symmetries of the system remain intact in all phases, and then use this information to constrain the parameters of the GE-autoencoder such that the encoder learns an order parameter invariant to these ``never-broken'' symmetries.

Theory of Non-Interacting Fermions and Bosons in the Canonical Ensemble

1 code implementation • 30 Jul 2020 • Hatem Barghathi, Jiangyong Yu, Adrian Del Maestro

We present a self-contained theory for the exact calculation of particle number counting statistics of non-interacting indistinguishable particles in the canonical ensemble.

Statistical Mechanics Quantum Gases

Dimensional Reduction of Helium-4 Inside Argon Plated MCM-41 Nanopores

1 code implementation • 11 Jun 2020 • Nathan Nichols, Timothy R. Prisk, Garfield Warren, Paul Sokol, Adrian Del Maestro

The angstrom-scale coherence length describing the superfluid wavefunction of helium-4 at low temperatures has prevented its preparation in a truly one-dimensional geometry.

Mesoscale and Nanoscale Physics

Equivalence of Spatial and Particle Entanglement Growth After a Quantum Quench

2 code implementations • 20 Dec 2019 • Adrian Del Maestro, Hatem Barghathi, Bernd Rosenow

We analyze fermions after an interaction quantum quench in one spatial dimension and study the growth of the steady state entanglement entropy density under either a spatial mode or particle bipartition.

Statistical Mechanics

Operationally accessible entanglement of one dimensional spinless fermions

1 code implementation • 8 May 2019 • Hatem Barghathi, Emanuel Casiano-Diaz, Adrian Del Maestro

Throughout the phase diagram, we discuss the connection between the accessible entanglement entropy and the variance of the probability distribution describing intra-subregion particle number fluctuations.

Quantum Physics Quantum Gases

Rényi generalization of the operational entanglement entropy

2 code implementations • 3 Apr 2018 • Hatem Barghathi, C. M. Herdman, Adrian Del Maestro

Operationally accessible entanglement in bipartite systems of indistinguishable particles could be reduced due to restrictions on the allowed local operations as a result of particle number conservation.

Quantum Gases Quantum Physics

Adsorption by design: tuning atom-graphene van der Waals interactions via mechanical strain

1 code implementation • 12 Feb 2016 • Nathan S. Nichols, Adrian Del Maestro, Carlos Wexler, Valeri N. Kotov

We show that the van der Waals potential can be significantly enhanced by strain, and present applications of our results to the problem of elastic scattering of atoms from graphene.

Mesoscale and Nanoscale Physics Materials Science