| dc.creator | Parisio, F | |
| dc.creator | de Aguiar, MAM | |
| dc.date | 2003 | |
| dc.date | DEC | |
| dc.date | 2014-11-17T08:23:50Z | |
| dc.date | 2015-11-26T16:41:32Z | |
| dc.date | 2014-11-17T08:23:50Z | |
| dc.date | 2015-11-26T16:41:32Z | |
| dc.date.accessioned | 2018-03-28T23:25:47Z | |
| dc.date.available | 2018-03-28T23:25:47Z | |
| dc.identifier | Physical Review A. American Physical Soc, v. 68, n. 6, 2003. | |
| dc.identifier | 1050-2947 | |
| dc.identifier | WOS:000187885000018 | |
| dc.identifier | 10.1103/PhysRevA.68.062112 | |
| dc.identifier | http://www.repositorio.unicamp.br/jspui/handle/REPOSIP/79873 | |
| dc.identifier | http://www.repositorio.unicamp.br/handle/REPOSIP/79873 | |
| dc.identifier | http://repositorio.unicamp.br/jspui/handle/REPOSIP/79873 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1272959 | |
| dc.description | We derive a semiclassical approximation for the coherent state propagator <z'e(-iHt/(h) over bar)\z(')> using a path integral formulation in which the intermediate coherent states can have arbitrary widths. Our semiclassical formula involves complex trajectories of the smoothed Hamiltonian H(q,p,b)=<z\(H) over cap \z> where b, the width of the coherent state \z>, is a free function that can be chosen conveniently. The generality of this formalism enables us to derive a semiclassical approximation which contains, as particular cases, other similar approximations known in the literature, providing a natural link between them. We present numerical results showing that the semiclassical propagation can be very sensitive to the choice of b and we suggest an energy dependent value b=b(E) that results in considerable improvement over other choices. This value for the width will be generally different from the widths sigma(') or sigma(') of the initial and final states \z(')> and \z(')>. | |
| dc.description | 68 | |
| dc.description | 6 | |
| dc.language | en | |
| dc.publisher | American Physical Soc | |
| dc.publisher | College Pk | |
| dc.publisher | EUA | |
| dc.relation | Physical Review A | |
| dc.relation | Phys. Rev. A | |
| dc.rights | aberto | |
| dc.source | Web of Science | |
| dc.subject | Initial-value Representation | |
| dc.subject | Wave-packet Dynamics | |
| dc.subject | Phase-space | |
| dc.subject | Approximations | |
| dc.title | Semiclassical coherent-state propagator via path integrals with intermediate states of variable width | |
| dc.type | Artículos de revistas | |
