Quantum Mechanical Reflection Resonances

Details Quantum Mechanical Reflection Resonances Quantum Mechanical Reflection Resonances

2006-10-27

arxiv.org/abs/quant-ph/0610239v1

Physics

Quantum Physics

4.1 pages 7 figures

Scientific paper

Resonances in the reflection probability amplitude r(E) can occur in energy ranges in which the reflection probability R(E)=|r(E)|^2 is 1. They occur as the phase phi(E) defined by r(E) = t*(E)/t(E) = 1e^{i 2phi(E)} undergoes a rapid change of pi radians. During this transition the phase angle exhibits a Lorentzian profile in that d(phi(E))/dE ~= 1/[(E-E_0)^2+(hbar*gamma/2)^2]. The energy E_0 identifies the location of a quasi-bound state, gamma measures the lifetime of this state, and t(E) is a matrix element of the transfer operator. Methods for computing and measuring these resonances are proposed.

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