摘要 :
We investigate the electron-positron pair creation process in a supercritical static electric field in the presence
of a static magnetic field that is perpendicular. If both fields vary spatially in one direction the dynamics can
...
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We investigate the electron-positron pair creation process in a supercritical static electric field in the presence
of a static magnetic field that is perpendicular. If both fields vary spatially in one direction the dynamics can
be reduced to a set of one-dimensional systems. Using a generalized computational quantum field theoretical
procedure, we calculate the time dependence of the spatial density for the created electrons. In the presence of the
magnetic field, a significant amount of suppression of pair creation is observed in the simulations and confirmed
by an analytical analysis for the limits of short-range fields and long interaction times. This suppression might
be interpreted in terms of Pauli blocking by the electron during its return to the creation region as it performs a
cyclotronlike motion in the magnetic field.
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摘要 :
By solving the quantum field theoretical version of the Klein-Gordon equation numerically, we study
the creation process for charged boson-antiboson pairs in static electric and magnetic fields. The fields are
perpendicular to eac...
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By solving the quantum field theoretical version of the Klein-Gordon equation numerically, we study
the creation process for charged boson-antiboson pairs in static electric and magnetic fields. The fields are
perpendicular to each other and spatially localized along the same direction, which permits us to study the crucial
impact of the magnetic field’s spatial extension on dynamics. If its width is comparable to that of the electric field,
we find a magnetically induced Lorentz suppression of the pair-creation process. When the width is increased
such that the created bosons can revisit the interaction region, we find a region of exponential self-amplification
that can be attributed to a spontaneous emissionlike enhancement. If the width is increased further, this trend is
reversed and the magnetic field can even shut off the particle production completely.
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