Zobrazeno 1 - 10
of 139
pro vyhledávání: '"Berkowitz, Evan"'
Despite its many advantages, the sensible application of the Hybrid Monte Carlo (HMC) method is often hindered by the presence of large - or even infinite - potential barriers. These potential barriers partition the configuration space into distinct
Externí odkaz:
http://arxiv.org/abs/2410.19148
The BKT transition in low-dimensional systems with a $U(1)$ global symmetry separates a gapless conformal phase from a trivially gapped, disordered phase, and is driven by vortex proliferation. Recent developments in modified Villain discretizations
Externí odkaz:
http://arxiv.org/abs/2409.00502
Publikováno v:
Proceedings of Science Volume 453 (LATTICE2023)
We apply constant imaginary offsets to the path integral for a reduction of the sign problem in the Hubbard model. These simple transformations enhance the quality of results from HMC calculations without compromising the speed of the algorithm. This
Externí odkaz:
http://arxiv.org/abs/2407.06896
Autor:
Rodekamp, Marcel, Berkowitz, Evan, Gäntgen, Christoph, Krieg, Stefan, Luu, Thomas, Ostmeyer, Johann, Pederiva, Giovanni
We present a Hamiltonian Monte Carlo study of doped perylene $\mathrm{C}_{20}\mathrm{H}_{12}$ described with the Hubbard model. Doped perylene can be used for organic light-emitting diodes (OLEDs) or as acceptor material in organic solar cells. There
Externí odkaz:
http://arxiv.org/abs/2406.06711
Graphene nanoribbons are a promising candidate for fault-tolerant quantum electronics. In this scenario, qubits are realised by localised states that can emerge on junctions in hybrid ribbons formed by two armchair nanoribbons of different widths. We
Externí odkaz:
http://arxiv.org/abs/2401.04715
We construct symmetry-preserving lattice regularizations of 2d QED with one and two flavors of Dirac fermions, as well as the `3450' chiral gauge theory, by leveraging bosonization and recently-proposed modifications of Villain-type lattice actions.
Externí odkaz:
http://arxiv.org/abs/2310.17539
The path integral formulation of quantum mechanical problems including fermions is often affected by a severe numerical sign problem. We show how such a sign problem can be alleviated by a judiciously chosen constant imaginary offset to the path inte
Externí odkaz:
http://arxiv.org/abs/2307.06785
Autor:
Rodekamp, Marcel, Berkowitz, Evan, Gäntgen, Christoph, Krieg, Stefan, Luu, Thomas, Ostmeyer, Johann
Monte Carlo simulations away from half-filling suffer from a sign problem that can be reduced by deforming the contour of integration. Such a transformation, which induces a Jacobian determinant in the Boltzmann weight, can be implemented using neura
Externí odkaz:
http://arxiv.org/abs/2203.00390
Autor:
Nicholson, Amy, Berkowitz, Evan, Bulava, John, Chang, Chia Cheng, Clark, M. A., Hanlon, Andrew D., Horz, Ben, Howarth, Dean, Korber, Christopher, Lee, Wayne Tai, Meyer, Aaron S., Monge-Camacho, Henry, Morningstar, Colin, Rinaldi, Enrico, Vranasc, Pavlos, Walker-Loud, Andre
Lattice QCD calculations of two-nucleon interactions have been underway for about a decade, but still haven't reached the pion mass regime necessary for matching onto effective field theories and extrapolating to the physical point. Furthermore, resu
Externí odkaz:
http://arxiv.org/abs/2112.04569
Autor:
Meyer, Aaron S., Berkowitz, Evan, Bouchard, Chris, Chang, Chia Cheng, Clark, M. A., Hörz, Ben, Howarth, Dean, Körber, Christopher, Monge-Camacho, Henry, Nicholson, Amy, Rinaldi, Enrico, Vranas, Pavlos, Walker-Loud, André
The Deep Underground Neutrino Experiment (DUNE) is an upcoming neutrino oscillation experiment that is poised to answer key questions about the nature of neutrinos. Lattice QCD has the ability to make significant impact upon DUNE, beginning with comp
Externí odkaz:
http://arxiv.org/abs/2111.06333