General properties of the evolution of unstable states at long times
General properties of the evolution of unstable states at long times
复制标题
长时间不稳定状态演化的一般性质
DOI:
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
Krzysztof Urbanowski
中科院分区:
文献类型:
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作者:
Krzysztof Urbanowski
AbstractAn effect generated by the non-exponential behaviour
of the survival amplitude of an unstable state at long times is considered.
It is known that this amplitude
tends to zero more slowly as t goes to infinity than any exponential function of t.
Using methods of asymptotic analysis
we find the asymptotic form of this amplitude at long times in a
general, model-independent case.
We find that the long time behaviour of this amplitude affects the form of
the instantaneous energy of unstable states: this energy should be much smaller for suitably
long times, t, than the energy of this state for t of the order of the lifetime of
the considered unstable state.