Zobrazeno 1 - 10
of 19
pro vyhledávání: '"S. A. Vitiello"'
Autor:
William Freitas, S. A. Vitiello
Publikováno v:
Quantum, Vol 7, p 1209 (2023)
We introduce a neural network-based approach for modeling wave functions that satisfy Bose-Einstein statistics. Applying this model to small $^4He_N$ clusters (with N ranging from 2 to 14 atoms), we accurately predict ground state energies, pair dens
Externí odkaz:
https://doaj.org/article/710efa4e373e45e0b5bb25b308bda1ee
Publikováno v:
Journal of physics. Condensed matter : an Institute of Physics journal. 33(7)
The metastable phase of solid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::05a25176bc5b359cb8064c4f4cefa8bf
https://pubmed.ncbi.nlm.nih.gov/33684073
https://pubmed.ncbi.nlm.nih.gov/33684073
A shadow wave function with an explicit symmetric kernel is introduced. As a consequence the atoms exchange in the system is enhanced. Basic properties of this class of trial functions are kept and quantities it can describe are easily estimated. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13c30fb211a3cf4d923409dc109c728f
http://arxiv.org/abs/1705.07170
http://arxiv.org/abs/1705.07170
An ultracold Fermi atomic gas at unitarity presents universal properties that in the diluted limit can be well described by a contact interaction. By employing a guide function with correct boundary conditions and making simple modifications to the s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::212c77936bf277ba43864825d6328961
http://arxiv.org/abs/1506.00039
http://arxiv.org/abs/1506.00039
Publikováno v:
Physical Review Letters. 78:1846-1849
We propose a variational wave function which uses coherent states to represent the spin state of particles, and describes systems with spin-dependent correlations. Spin states are parametrized by a continuous variable that looks like a classical spin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69e4bf857d2033b2ce2afcab3c8a7df3
https://doi.org/10.1103/physrevlett.78.1846
https://doi.org/10.1103/physrevlett.78.1846
Publikováno v:
Physical Review B. 53:15129-15135
The ideas of the shadow wave function are applied to construct a variational wave function to describe the liquid and the solid phase of a system that obeys Fermi statistics. The shadow variables are introduced in the symmetric correlating factor. Th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8f3d7d347cb939845c9fd3f1eb3544de
https://doi.org/10.1103/physrevb.53.15129
https://doi.org/10.1103/physrevb.53.15129
Publikováno v:
Europhysics Letters (EPL). 21:679-684
The shadow wave function for the excited states of superfluid 4He is used to construct the density matrix of the system within the independent excitation picture. From the temperature dependence of the total and of the kinetic energy we infer that mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::860e72cec2b09da89ab008eb9507d255
https://doi.org/10.1209/0295-5075/21/6/008
https://doi.org/10.1209/0295-5075/21/6/008
Publikováno v:
Journal of Low Temperature Physics. 89:433-436
The shadow wavefunction is generalized by introducing a pseudopotential with an attractive part for the auxiliary variables. The authors report variational Monte Carlo results for the ground state of a system of {sup 4}He atoms in the liquid phase. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75b723a74328b95d1a41d9ac7d78f3f7
https://doi.org/10.1007/bf00694057
https://doi.org/10.1007/bf00694057
Publikováno v:
Journal of Low Temperature Physics. 89:335-344
We have computed properties of superfluid4He on the basis of a new density matrix which is based on a shadow wave function for the roton excitation. We deduce the separate contribution of kinetic and potential energy to a roton and find that a roton
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::174c7c384b2a4b1f828247f798a6bf28
https://doi.org/10.1007/bf00692606
https://doi.org/10.1007/bf00692606
Publikováno v:
Physical review letters. 104(8)
We investigate the structure and mobility of dislocations in hcp 4He crystals. In addition to fully characterizing the five elastic constants of this system, we obtain direct insight into dislocation core structures on the basal plane, which demonstr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::a5052ef340e8c4299fcd36fcb90b2526
https://pubmed.ncbi.nlm.nih.gov/20366942
https://pubmed.ncbi.nlm.nih.gov/20366942