25 citations · 66 across the 7 of their papers we have counts for
7 papers
Universal scaling of quantum caustics in the dynamics of interacting particles
Monalisa Singh Roy, Jesse Mumford, D. H. J. O'Dell +1
Recent theoretical studies have predicted the existence of caustics in many-body quantum dynamics, where they manifest as extended regions of enhanced probability density that obey…
Topologically protected Bell-cat states in a simple spin model
B. Lajci, D. H. J. O'Dell, J. Mumford
We consider the topological properties of the so-called central spin model that consists of identical spins coupled to a single distinguishable central spin which arises in phy…
Gauge potentials and vortices in the Fock space of a pair of periodically driven Bose-Einstein condensates
J. Mumford, D. Kamp, D. H. J. O'Dell
We perform a theoretical study of the coupled dynamics of two species of Bose-Einstein condensates (BECs) in a double well potential where both the tunneling and the interatomic in…
Measuring out-of-time-ordered correlation functions with a single impurity qubit in a bosonic Josephson junction
J. Mumford, W. Kirkby, D. H. J. O'Dell
We calculate the out-of-time-ordered correlation function (OTOC) of a single impurity qubit coupled to fully a connected many-particle system such as a bosonic Josephson junction o…
Quantum caustics and the hierarchy of light cones in quenched spin chains
W. Kirkby, J. Mumford, D. H. J. O'Dell
We show that the light cone-like structures that form in spin chains after a quench are quantum caustics. Their natural description is in terms of catastrophe theory and this impli…
Critical exponents for an impurity in a bosonic Josephson junction: Position measurement as a phase transition
J. Mumford, D. H. J. O'Dell
We use fidelity susceptibility to calculate quantum critical scaling exponents for a system consisting of identical bosons interacting with a single impurity atom in a double w…
Impurity in a bosonic Josephson junction: swallowtail loops, chaos, self-trapping and the poor man's Dicke model
Jesse Mumford, Jonas Larson, D. H. J. O'Dell
We study a model describing identical bosonic atoms trapped in a double-well potential together with a single impurity atom, comparing and contrasting it throughout with the Di…