A bstract We study production of dark relics during reheating after the end inflation in a system consisting non-minimally coupled spectator scalar field and inflaton. derive set renormalized quantum transport equations for one-point function two-point solve them numerically. find that our can embody both tachyonic parametric instabilities. The former is an expected result due to non-minimal co...

Eigenmode coalescence imparts remarkable properties to non-hermitian time evolution, culminating in a purely spectral degeneracy known as an exceptional point (EP). Here, we revisit evolution at the EP and classify two-level Hamiltonians terms of M\"obius group. We then leverage that classification study dynamical encircling, by applying it periodically-modulated (Floquet) Hamiltonians. This re...

Articulated liquid cargo vehicles transporting inflammable fuels and dangerous chemical products require special consideration when traveling on urban roads or cruising at highway speeds. The road safety and handling of these kinds of vehicles may be adversely affected when negotiating sharp turns or travelling on slippery roads, which may result in either lateral instabilities or complete roll...

A two-component Bose–Einstein condensate of cold atoms with a strong intercomponent repulsion leading to the spatial separation components has been numerically studied. Configurations multiple quantized vortex in one component, where core is filled other are considered. The effective radius can exceed width transition layer between components, and then an analogy cylindrical classical hydrodyna...

This paper reports automatic compensation of strong thermal lensing in a suspended 80 m optical cavity with sapphire test mass mirrors. Variation of the transmitted beam spot size is used to obtain an error signal to control the heating power applied to the cylindrical surface of an intracavity compensation plate. The negative thermal lens created in the compensation plate compensates the posit...

The quantum dynamics of the symmetry broken λ (~ Φ2)2 scalar field theory in the presence of an homogeneous external field is investigated in the large N limit. We choose as initial state the ground state for a constant external field ~ J . The sign of the external field is suddenly flipped from ~ J to − ~ J at a given time and the subsequent quantum dynamics calculated. Spinodal instabilities ...

Interactions of 100-fs laser pulses with solid targets at intensities of 10(18) W/cm(2) and resultant terahertz (THz) radiation are studied under different laser contrast ratio conditions. THz emission is measured in the specular reflection direction, which appears to decrease as the laser contrast ratio varies from 10(-8) to 10(-6). Correspondingly, the frequency spectra of the reflected light...

Abstract As a typical plasma-based optical element that can sustain ultra-high light intensity, plasma density gratings driven by intense laser pulses have been extensively studied for wide applications. Here, we show the grating two intersecting driver is not only nonuniform in space but also varies over time. Consequently, probe pulse passes through such dynamic will be depolarized, is, its p...

We present a nonlinear theory for relativistic x-ray free-electron lasers in the quantum regime, using a collective Klein-Gordon (KG) equation (for relativistic electrons), which is coupled with the Maxwell-Poisson equations for the electromagnetic and electrostatic fields. In our model, an intense electromagnetic wave is used as a wiggler which interacts with a relativistic electron beam to pr...

We describe several strategies for the calibration of one factor Hull-White model with constant or time-dependent mean reversion and volatility parameters to the interest rate vanillas. We propose an efficient approximation formula for the swaption implied volatility which enables us to estimate the mean reversion independently of the volatility. We give the closed-forms for exact pricing using...