Zobrazeno 1 - 10
of 352
pro vyhledávání: '"O'Dell, D"'
We consider the topological properties of the so-called central spin model that consists of $N$ identical spins coupled to a single distinguishable central spin which arises in physical systems such as circuit-QED and bosonic Josephson junctions coup
Externí odkaz:
http://arxiv.org/abs/2410.23532
The question of the correct formulation for the momentum of light in a dielectric medium is typically referred to as the ``Abraham-Minkowski controversy". Experiments conducted to elucidate the issue have primarily focused on measuring forces and mom
Externí odkaz:
http://arxiv.org/abs/2410.17010
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 temporal and spatial scaling relations. Focusing on the transverse-fi
Externí odkaz:
http://arxiv.org/abs/2410.06803
We provide a new perspective on quantum dynamical phase transitions (DPTs) by explaining their origin in terms of caustics that form in the Fock space representation of the many-body state over time, using the fully connected transverse field Ising m
Externí odkaz:
http://arxiv.org/abs/2407.10529
Publikováno v:
Phys. Rev. A 110, 043310 (2024)
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 interactions are driven periodically in time. The population difference
Externí odkaz:
http://arxiv.org/abs/2404.00533
Publikováno v:
New J. Phys. 26, 053023 (2024)
In this paper we show how the quantum mechanics of the inverted harmonic oscillator can be mapped to the quantum mechanics of a particle in a super-critical inverse square potential. We demonstrate this by relating both of these systems to the Berry-
Externí odkaz:
http://arxiv.org/abs/2402.13909
Publikováno v:
Phys. Rev. A 108, 013312 (2023)
Caustics are singularities that occur naturally in optical, hydrodynamic and quantum waves, giving rise to high amplitude patterns that can be described using catastrophe theory. In this paper we study caustics in a statistical field theory setting i
Externí odkaz:
http://arxiv.org/abs/2301.08410
Publikováno v:
J. Phys. A: Math. Theor. 56, 044001 (2023)
Waves propagating near an event horizon display interesting features including logarithmic phase singularities and caustics. We consider an acoustic horizon in a flowing Bose-Einstein condensate where the elementary excitations obey the Bogoliubov di
Externí odkaz:
http://arxiv.org/abs/2209.11148
Publikováno v:
Physical Review B, 108, L121108 (2023)
Out of time ordered correlators (OTOCs) are useful tools for investigating foundational questions such as thermalization in closed quantum systems because they can potentially distinguish between integrable and nonintegrable dynamics. Here we discuss
Externí odkaz:
http://arxiv.org/abs/2111.01336
We demonstrate that two-time correlation functions, which are generalizations of out-of-time-ordered correlators (OTOCs), can show 'false-flags' of chaos by exhibiting behaviour predicted by random matrix theory even in a system with classically regu
Externí odkaz:
http://arxiv.org/abs/2108.09391