Interference effects in Schwinger vacuum pair production for timedependent laser pulses
Abstract
We present simple new approximate formulas, for both scalar and spinor QED, for the number of particles produced from vacuum by a timedependent electric field, incorporating the interference effects that arise from an arbitrary number of distinct semiclassical turning points. Such interference effects are important when the temporal profile of the laser pulse has subcycle structure. We show how the resulting semiclassical intuition may be used to guide the design of temporal profiles that enhance the momentum spectrum due to interference effects. The result is easy to implement and generally applicable to timedependent tunneling problems, such as those that appear in many other contexts in particle and nuclear physics, condensed matter physics, atomic physics, chemical physics, and gravitational physics.
 Publication:

Physical Review D
 Pub Date:
 March 2011
 DOI:
 10.1103/PhysRevD.83.065028
 arXiv:
 arXiv:1102.2899
 Bibcode:
 2011PhRvD..83f5028D
 Keywords:

 12.20.Ds;
 11.15.Kc;
 03.65.Sq;
 11.15.Tk;
 Specific calculations;
 Classical and semiclassical techniques;
 Semiclassical theories and applications;
 Other nonperturbative techniques;
 High Energy Physics  Theory;
 High Energy Physics  Phenomenology;
 Quantum Physics
 EPrint:
 19 pages