8 papers
Pair creation via Amplitude-Modulated Periodic and Quasiperiodic Pulse Sequences
Deepak Sah
We study nonperturbative pair production driven by alternating-sign electric field pulse trains. Using a quantum kinetic approach, we analyze both the longitudinal momentum spectru…
Pair Production in time-dependent Electric field at Finite times
Deepak Sah, Manoranjan P. Singh
We investigate the finite-time behavior of pair production from the vacuum by a time-dependent Sauter pulsed electric field. By examining the temporal behavior of the single-partic…
Unitarity constraints on 2HDM with higher dimensional operators
Deepak Sah
We study how the requirement of perturbative unitarity restricts the parameter space of the two-Higgs-doublet model (2HDM) when higher-dimensional operators up to dimension six are…
Electron-positron pair creation induced by multi-pulse train of electric fields: effect of randomness in time-delay
Deepak Sah, Manoranjan P. Singh
We investigate the creation of electron-positron pairs (EPPs) in a sequence of alternating-sign, time-dependent electric field pulse trains by solving the quantum Vlasov equations.…
Longitudinal Momentum Spectra of pair created in a pulsed field at finite times: Are Oscillations "Real"
Deepak Sah, Manoranjan P. Singh
We discuss the mechanism of production of electron-positron pairs from the vacuum in a time-varying, spatially uniform pulsed electric field. We analytically compute the probabilit…
Vacuum polarization current in presence of intense Sauter field
Deepak Sah, Manoranjan P. Singh
The quantum vacuum becomes unstable under an external field, leading to spontaneous particle-antiparticle pair creation. In canonical quantization, the time-dependent particle numb…