Results 21 to 30 of about 304,578 (296)

Quantum-Inspired Magnetic Hamiltonian Monte Carlo.

PLoS ONE, 2021
Hamiltonian Monte Carlo (HMC) is a Markov Chain Monte Carlo algorithm that is able to generate distant proposals via the use of Hamiltonian dynamics, which are able to incorporate first-order gradient information about the target posterior.
Wilson Tsakane Mongwe, Rendani Mbuvha, Tshilidzi Marwala   +2 more
doaj   +1 more source

Polynomial supersymmetry for matrix Hamiltonians [PDF]

Physics Letters A, 2013
9 ...
openaire   +3 more sources

Diabatic Hamiltonian matrix elements made simple

Physical Review C, 2022
With a view to applying the Generator Coordinate Method to large configuration spaces, we propose a simple approximate formula to compute diabatic many-body matrix elements without having to evaluate two-body interaction matrix elements. The method is illustrated with two analytically solvable Hamiltonians based on the harmonic oscillator.
K. Hagino, G. F. Bertsch
openaire   +2 more sources

Higher-Order Matrix Spectral Problems and Their Integrable Hamiltonian Hierarchies

Mathematics, 2023
Starting from a kind of higher-order matrix spectral problems, we generate integrable Hamiltonian hierarchies through the zero-curvature formulation.
Shou-Ting Chen, Wen-Xiu Ma
doaj   +1 more source

Generic Construction of Efficient Matrix Product Operators [PDF]

, 2017
Matrix Product Operators (MPOs) are at the heart of the second-generation Density Matrix Renormalisation Group (DMRG) algorithm formulated in Matrix Product State language.
Hubig, C., McCulloch, I. P., Schollwöck, U.   +2 more
core   +2 more sources

SUSY approach to Pauli Hamiltonians with an axial symmetry [PDF]

, 2006
A two-dimensional Pauli Hamiltonian describing the interaction of a neutral spin-1/2 particle with a magnetic field having axial and second order symmetries, is considered. After separation of variables, the one-dimensional matrix Hamiltonian is analyzed
Bagchi B K, Cannata F, Cooper F, Gendenstein L E, Ioffe M V, Ioffe M V, Ioffe M V, J Negro, Junker G, L M Nieto, Lyman J M, M V Ioffe, Miller W, Mota R D, Negro J, Pron'ko G P, Samsonov B F, Voronin A I, Ş Kuru   +18 more
core   +2 more sources

Frustration Free Gapless Hamiltonians for Matrix Product States [PDF]

Communications in Mathematical Physics, 2014
36 pages, new version with some contents rearranged, and a correction in the injective ...
Fernández-González, C., Schuch, N., Wolf, M. M., Cirac, J. I., Pérez-García, D.   +4 more
openaire   +7 more sources

Transformations of ray transferences of optical systems to augmented Hamiltonian matrices and the problem of the average system

African Vision and Eye Health, 2007
The first-order optical nature of an optical system (including an eye) is completely characterized by a 55 ×  matrix called the ray transference.
J. R. Cardoso
doaj   +1 more source

Correlations in excited states of local Hamiltonians [PDF]

, 2011
Physical properties of the ground and excited states of a $k$-local Hamiltonian are largely determined by the $k$-particle reduced density matrices ($k$-RDMs), or simply the $k$-matrix for fermionic systems---they are at least enough for the calculation ...
A. J. Coleman, Bei Zeng, D. M. Greenberger, J. Cioslowski, Jianxin Chen, Zhaohui Wei, Zhengfeng Ji   +6 more
core   +1 more source

Symplectic analogs of polar decomposition and their applications to bosonic Gaussian channels

, 2020
We obtain several analogs of real polar decomposition for even dimensional matrices. In particular, we decompose a non-degenerate matrix as a product of a Hamiltonian and an anti-symplectic matrix and under additional requirements we decompose a matrix ...
Teretenkov, A. E.
core   +1 more source