Electron-positron pair production in oscillating electric fields with double-pulse structure

Abstract

Electron-positron pair production from vacuum in a strong electric field oscillating in time is studied. The field is assumed to consist of two consecutive pulses, with variable time delay in between. Pair production probabilities are obtained by numerical solution of the corresponding time-dependent Dirac equation. Considering symmetric field configurations comprising two identical pulses, we show that the pulse distance strongly affects the momentum spectra of produced particles and even the total production probability. Conversely, in a highly asymmetric situation when the field contains low-intensity prepulse and high-intensity main pulse, we identify a range of field parameters where the prepulse despite its weakness can leave visible traces in the particle spectra.

Two-color phase-of-the-phase spectroscopy applied to nonperturbative electron-positron pair production in strong oscillating electric fields

“…The relative phase was shown here to exhibit a distinct influence on the momentum distribution of created particles. Similar coherence effects were found for pair production in trains of electric field pulses due to multiple-slit interferences in the time domain [22][23][24][25][26][27].…”

“…As a consequence, a field frequency of ω = 0.49072m leads to resonant production of particles at rest by absorption of five field quanta ("photons") [39]. To allow for a comparison of our results with this earlier study (see also the recent analysis of pair production in electric double pulses [27]), we have used the same frequency value in our numerical calculations. Besides, the normalized amplitude of the fundamental mode is taken as ξ 1 = |e|A 1 /m = 1, lying in the nonperturbative multiphoton regime of pair production.…”

Helmholtz Hamiltonian Mechanics Electromagnetic Physics Gaging Charge Fields Having Novel Quantum Circuitry Model

“…For example, the magnetic field of monopoles and the electric field of charges would exhibit the same behavior, and a moving magnetic monopole would induce a circulating electric field. 13 It is the application of Iyer Markoulakis general formalism 1 capable of gaging Helmholtz decomposition fields onto Pauli Dirac monopole particle fields 14 that is of concern here to model ansatz quantitatively general formalism at Planck level physics. Section 2 shows construct of a Pauli Dirac Planck circuit matrix field gradient of particle monopole flow loop.…”

Multi-photon enhancement of the Schwinger pair production mechanism under strong FEL radiation

“…The more recent advent of the free-electron laser (FEL), in facilities such as the European XFEL [10], DESY [11], SLAC [12] and SACLA [13], revived the interest in this problem over the last twenty years or so [14][15][16][17][18][19][20][21][22][23][24][25][26][27], because FEL's can provide strong, tightly focused radiation with energies up to the hard X-rays regime. At the same time, many authors have in addition explored possible ways to effectively enhance the pair creation yield by using colliding focused polarized pulses [28], consecutive pulses with time delay [29], combinations of weak high-frequency and strong lowfrequency fields [30][31][32], strong fields combined with thermal backgrounds [33], as well as fields with frequency [34] or amplitude [35] modulations. It is important to note here that most of the above mentioned studies distinguish pair creation into two regimes depending on the field parameters, i.e.…”