Razmik Unanyan

TL;DR: In this article, the influence of three pulsed laser fields interacting with a four-state atomic system for which there occur two degenerate population-trapping dressed states is analyzed, and a simple expression for the geometrical phase acquired by such an atom during a stimulated Raman adiabatic passage (STIRAP) process using a delay between Stokes and pump pulses, during which the two Rabi frequencies adiabbatically traverse a closed path in the parameter space.

TL;DR: In this article, the authors describe a method for creating an arbitrary coherent superposition of two atomic states in a controlled and robust way by using a sequence of three pulses in a four-state system.

TL;DR: The number entropy S_{N} is investigated-which characterizes particle-number fluctuations between subsystems-following a quench in one-dimensional interacting many-body systems with potential disorder, indicating continuing subdiffusive particle transport at a very slow rate.

TL;DR: In this article, the authors provided an in-depth numerical study of the disordered Heisenberg chain and showed that the behavior is not transient and persists even for very strong disorder.

TL;DR: In this article, a single laser pulse, of varying linear polarization, is used to transfer population between sublevels of a degenerate atomic level, based on application of the procedure of stimulated Raman adiabatic passage (STIRAP).