کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10728041 1037819 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Semiclassics around a phase space caustic: An illustration using the Nelson Hamiltonian
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Semiclassics around a phase space caustic: An illustration using the Nelson Hamiltonian
چکیده انگلیسی
The semiclassical formula for the coherent-state propagator is written in terms of complex classical trajectories of an equivalent classical system. Depending on the parameters involved, more than one trajectory may contribute to the calculation. Eventually, however, two contributing trajectories coalesce, characterizing what is called phase space caustic. In this case, the usual semiclassical formula for the propagator diverges, so that a uniform approximation is required to avoid this singularity. In this Letter, we present a non-trivial numerical application illustrating this scenario, showing the accuracy of the uniform formula that we have previously derived.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 375, Issue 4, 24 January 2011, Pages 812-816
نویسندگان
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