9 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…
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.…
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…
Dynamical Scaling in Pair Production for Scalar QED
Deepak Sah, Manoranjan P. Singh
We report on the dynamical scaling of momentum spectra for particle-antiparticle pairs at finite times within the framework of scalar Quantum Electrodynamics (QED). The analysis fo…
Does the oscillatory behavior of the Momentum Spectrum depend on the basis in the Post-Transient Stage?
Deepak Sah, Manoranjan P. Singh
Pair creation by a spatially homogeneous, time-dependent electric field is studied within the framework of scalar quantum electrodynamics. We employ the standard Bogoliubov transfo…
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…
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…
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 time-dependent Sauter pulsed electric fields in spinor quantum electrodynamics (QED). Using the exact…