dorsal/arxiv
View SchemaNew method for obtaining complex roots in the semiclassical coherent-state propagator formula
| Authors | A. L. Xavier Jr |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0009114 |
| URL | https://arxiv.org/abs/quant-ph/0009114 |
| DOI | 10.1590/S0103-97332001000300018 |
Abstract
A semiclassical formula for the coherent-state propagator requires the determination of specific classical paths inhabiting a complex phase-space through a Hamiltonian flux. Such trajectories are constrained to special boundary conditions which render their determination difficult by common methods. In this paper we present a new method based on Runge-Kutta integrator for a quick, easy and accurate determination of these trajectories. Using nonlinear one dimensional systems we show that the semiclassical formula is highly accurate as compared to its exact counterpart . Further we clarify how the phase of the semiclassical approximation is correctly retrieved under time evolution.
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"abstract": "A semiclassical formula for the coherent-state propagator requires the\ndetermination of specific classical paths inhabiting a complex phase-space\nthrough a Hamiltonian flux. Such trajectories are constrained to special\nboundary conditions which render their determination difficult by common\nmethods. In this paper we present a new method based on Runge-Kutta integrator\nfor a quick, easy and accurate determination of these trajectories. Using\nnonlinear one dimensional systems we show that the semiclassical formula is\nhighly accurate as compared to its exact counterpart . Further we clarify how\nthe phase of the semiclassical approximation is correctly retrieved under time\nevolution.",
"arxiv_id": "quant-ph/0009114",
"authors": [
"A. L. Xavier Jr"
],
"categories": [
"quant-ph"
],
"doi": "10.1590/S0103-97332001000300018",
"title": "New method for obtaining complex roots in the semiclassical coherent-state propagator formula",
"url": "https://arxiv.org/abs/quant-ph/0009114"
},
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