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2016 ; 6
(ä): 25292
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Pumping Electron-Positron Pairs from a Well Potential
#MMPMID27125998
Wang Q
; Liu J
; Fu LB
Sci Rep
2016[Apr]; 6
(ä): 25292
PMID27125998
show ga
In the presence of very deep well potential, electrons will spontaneously occupy
the empty embedded bound states and electron-positron pairs are created by means
of a non-perturbative tunneling process. In this work, by slowly oscillating the
width or depth, the population transfer channels are opened and closed
periodically. We find and clearly show that by the non-synchronous ejections of
particles, the saturation of pair number in a static super-critical well can be
broken, and electrons and positrons can be pumped inexhaustibly from vacuum with
a constant production rate. In the adiabatic limit, final pair number after a
single cycle has quantized values as a function of the upper boundary of the
oscillating, and the critical upper boundaries indicate the diving points of the
bound states.
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