000124008 001__ 124008
000124008 005__ 20250307094029.0
000124008 0247_ $$2doi$$a10.1103/PhysRevB.107.035121
000124008 0248_ $$2sideral$$a132357
000124008 037__ $$aART-2023-132357
000124008 041__ $$aeng
000124008 100__ $$aQian, T.
000124008 245__ $$aNon-Gaussian variational wave functions for interacting bosons on a lattice
000124008 260__ $$c2023
000124008 5060_ $$aAccess copy available to the general public$$fUnrestricted
000124008 5203_ $$aA variational method for studying the ground state of strongly interacting quantum many-body bosonic systems is presented. Our approach constructs a class of extensive variational non-Gaussian wave functions which extend Gaussian states by means of nonlinear canonical transformations (NLCTs) on the fields of the theory under consideration. We illustrate this method with the one-dimensional Bose-Hubbard model for which the proposal presented here provides a family of approximate ground states at arbitrarily large values of the interaction strength. We find that, for different values of the interaction, the non-Gaussian NLCT-trial states sensibly improve the ground-state energy estimation when the system is in the Mott phase.
000124008 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/PID2020-115221GBC41/AEI/10.13039/501100011033$$9info:eu-repo/grantAgreement/ES/DGA/E09-17R-Q-MAD
000124008 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000124008 592__ $$a1.345$$b2023
000124008 590__ $$a3.2$$b2023
000124008 594__ $$a6.3$$b2023
000124008 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b201 / 439 = 0.458$$c2023$$dQ2$$eT2
000124008 591__ $$aPHYSICS, CONDENSED MATTER$$b31 / 79 = 0.392$$c2023$$dQ2$$eT2
000124008 591__ $$aPHYSICS, APPLIED$$b62 / 179 = 0.346$$c2023$$dQ2$$eT2
000124008 593__ $$aElectronic, Optical and Magnetic Materials$$c2023$$dQ1
000124008 593__ $$aCondensed Matter Physics$$c2023$$dQ1
000124008 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000124008 700__ $$aFernández-Melgarejo, J. J.
000124008 700__ $$0(orcid)0000-0003-4478-1948$$aZueco, D.
000124008 700__ $$aMolina-Vilaplana, J.
000124008 773__ $$g107, 3 (2023), 035121 [9 pp.]$$pPhys. Rev. B$$tPhysical Review B$$x2469-9950
000124008 8564_ $$s328840$$uhttps://zaguan.unizar.es/record/124008/files/texto_completo.pdf$$yVersión publicada
000124008 8564_ $$s3169417$$uhttps://zaguan.unizar.es/record/124008/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000124008 909CO $$ooai:zaguan.unizar.es:124008$$particulos$$pdriver
000124008 951__ $$a2025-03-07-09:38:54
000124008 980__ $$aARTICLE