Zobrazeno 1 - 10
of 39 173
pro vyhledávání: '"A Mcculloch"'
Physical theories have a limited regime of validity and hence must be accompanied by a breakdown diagnostic to establish when they cease to be valid as parameters are varied. For perturbative theories, estimates of the first neglected order offer val
Externí odkaz:
http://arxiv.org/abs/2410.23709
Autor:
Osborne, Jesse J., McCulloch, Ian P.
Numerical methods based on matrix product states (MPSs) are currently the de facto standard for calculating the ground state properties of (quasi-)one-dimensional quantum many-body systems. While the properties of the low-lying excitations in such sy
Externí odkaz:
http://arxiv.org/abs/2408.17117
Autor:
McCulloch, Ryan
Publikováno v:
Innovations in Incidence Geometry: Algebraic, Topological and Combinatorial 2024
In this note we establish a 1-to-1 correspondence between the class of generalized quadrangles with ovoids and the class of balanced incomplete block designs that posses a non-triangular local resolution system and have the appropriate parameters. We
Externí odkaz:
http://arxiv.org/abs/2408.00887
The one-dimensional spin-$s$ ${\rm SU}(2)$ ferromagnetic Heisenberg model, as a paradigmatic example for spontaneous symmetry breaking (SSB) with type-B Goldstone modes (GMs), is expected to exhibit an abstract fractal underlying the ground state sub
Externí odkaz:
http://arxiv.org/abs/2407.17925
Dynamical quantum phase transitions (DQPTs) have been established as a rigorous framework for investigating far-from-equilibrium quantum many-body criticality. Although initially thought to be trivially connected to an order parameter flipping sign,
Externí odkaz:
http://arxiv.org/abs/2407.03394
Steady-state currents generically occur both in systems with continuous translation invariance and in nonequilibrium settings with particle drift. In either case, thermal fluctuations advected by the current act as a source of noise for slower hydrod
Externí odkaz:
http://arxiv.org/abs/2407.03412
We construct an ensemble of two-dimensional nonintegrable quantum circuits that are chaotic but have a conserved particle current, and thus a finite Drude weight. The long-wavelength hydrodynamics of such systems is given by the incompressible Navier
Externí odkaz:
http://arxiv.org/abs/2405.13892
Decarbonizing the building stock in cold countries by replacing fossil fuel boilers with heat pumps is expected to drastically increase electricity demand. While heating flexibility could reduce the impact of additional demand from heat pumps on the
Externí odkaz:
http://arxiv.org/abs/2405.10450
We study $\mathbb{R}_{\textrm{an},\exp}$-definable functions $f:\mathbb{R}\to \mathbb{R}$ that take integer values at all sufficiently large positive integers. If $|f(x)|= O\big(2^{(1+10^{-5})x}\big)$, then we find polynomials $P_1, P_2$ such that $f
Externí odkaz:
http://arxiv.org/abs/2404.10737
Exact matrix product state representations for a type of scale-invariant states are presented, which describe highly degenerate ground states arising from spontaneous symmetry breaking with type-B Goldstone modes in one-dimensional quantum many-body
Externí odkaz:
http://arxiv.org/abs/2403.09458