Quality of variational ground states for a two-state system coupled to phonons

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dc.contributor.authorStolze, Joachim
dc.contributor.authorMüller, Lothar
dc.date.accessioned2008-06-03T12:40:22Z
dc.date.available2008-06-03T12:40:22Z
dc.date.issued1990
dc.description.abstractWe generalize the variational approach proposed by Chen, Zhang, and Wu [Phys. Rev. B 40, 11 326 (1989)] to the ground state of a two-level system coupled to a single boson mode. The resulting displaced-squeezed state is compared to the true ground state (calculated numerically), and to further variational states, by computing energy differences and overlaps. These states are able to describe a bifurcation occurring in the ground state of the quantum system as well as in the equilibrium state of its classical limit, and they are excellent approximations to the true ground state.en
dc.identifier.citationStolze, Joachim; Müller, Lothar: Quality of variational ground states for a two-state system coupled to phonons. In: Physical Review B Nr. 10, Jg. 42(1990), 6704-6706, doi: 10.1103/PhysRevB.42.6704 .de
dc.identifier.doi10.1103/PhysRevB.42.6704
dc.identifier.urihttp://hdl.handle.net/2003/25425
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-3400
dc.identifier.urlhttp:/dx.doi.org/ 10.1103/PhysRevB.42.6704
dc.language.isoende
dc.publisherThe American Physical Societyen
dc.rights©1990 The American Physical Societyen
dc.subject.ddc510
dc.titleQuality of variational ground states for a two-state system coupled to phononsen
dc.typeTextde
dc.type.publicationtypearticlede
dcterms.accessRightsrestricted
eldorado.identifier.urlhttp://t1.physik.tu-dortmund.de/stolze/publications/PRB_42_6704.pdf

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