Exact decay and tunnelling dynamics of interacting few-boson systems

Axel U.J. Lode; Alexej I. Streltsov; Ofir E. Alon; Hans Dieter Meyer; Lorenz S. Cederbaum

doi:10.1088/0953-4075/42/4/044018

Exact decay and tunnelling dynamics of interacting few-boson systems

Axel U.J. Lode, Alexej I. Streltsov, Ofir E. Alon, Hans Dieter Meyer, Lorenz S. Cederbaum

Research output: Contribution to journal › Article › peer-review

Abstract

The decay and tunnelling dynamics of repulsive few-boson systems through a one-dimensional potential barrier is studied from first principles. To this end, we solve the numerically exact time-dependent few-boson Schrödinger equation by utilizing the successful multiconfiguration time-dependent Hartree method. Benchmark results for a wide range of interactions are reported. Deviations from the time-dependent Gross-Pitaevskii approach are identified. Counterintuitively, the mean-field approach can overestimate the tunnelling times even for relatively weakly-interacting few-boson systems. Implications are discussed.

Original language	English
Article number	044018
Journal	Journal of Physics B: Atomic, Molecular and Optical Physics
Volume	42
Issue number	4
DOIs	https://doi.org/10.1088/0953-4075/42/4/044018
State	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics

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title = "Exact decay and tunnelling dynamics of interacting few-boson systems",

abstract = "The decay and tunnelling dynamics of repulsive few-boson systems through a one-dimensional potential barrier is studied from first principles. To this end, we solve the numerically exact time-dependent few-boson Schr{\"o}dinger equation by utilizing the successful multiconfiguration time-dependent Hartree method. Benchmark results for a wide range of interactions are reported. Deviations from the time-dependent Gross-Pitaevskii approach are identified. Counterintuitively, the mean-field approach can overestimate the tunnelling times even for relatively weakly-interacting few-boson systems. Implications are discussed.",

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T1 - Exact decay and tunnelling dynamics of interacting few-boson systems

AU - Lode, Axel U.J.

AU - Streltsov, Alexej I.

AU - Alon, Ofir E.

AU - Meyer, Hans Dieter

AU - Cederbaum, Lorenz S.

PY - 2009

Y1 - 2009

N2 - The decay and tunnelling dynamics of repulsive few-boson systems through a one-dimensional potential barrier is studied from first principles. To this end, we solve the numerically exact time-dependent few-boson Schrödinger equation by utilizing the successful multiconfiguration time-dependent Hartree method. Benchmark results for a wide range of interactions are reported. Deviations from the time-dependent Gross-Pitaevskii approach are identified. Counterintuitively, the mean-field approach can overestimate the tunnelling times even for relatively weakly-interacting few-boson systems. Implications are discussed.

AB - The decay and tunnelling dynamics of repulsive few-boson systems through a one-dimensional potential barrier is studied from first principles. To this end, we solve the numerically exact time-dependent few-boson Schrödinger equation by utilizing the successful multiconfiguration time-dependent Hartree method. Benchmark results for a wide range of interactions are reported. Deviations from the time-dependent Gross-Pitaevskii approach are identified. Counterintuitively, the mean-field approach can overestimate the tunnelling times even for relatively weakly-interacting few-boson systems. Implications are discussed.

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IS - 4

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ER -

Exact decay and tunnelling dynamics of interacting few-boson systems

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