Conditional phase-shift enhancement through dynamical Rydberg blockade

Abstract

-Large cross-phase shifts per photon can be attained through an all-optical polarization control of dipole blockade in Rydberg atoms. A pair of weak circularly polarized signal and control light pulses experience a giant nonlinear cross-interaction through the conditional excitation of a Rydberg state. Conditional cross-phase modulations on the order of π-radians may be attained under specific symmetric EIT quasi-resonant driving conditions at large degrees of transparency. We also suggest the possibility of extending our scheme to work at very low intensities and within a few-blockade-radii regions.

Manipulation of a weak signal pulse by optical soliton via double electromagnetically induced transparency

“…A weak signal pulse trapped by a probe soliton has been explored deeply in a tripod-type atomic system via double EIT [33,34], but no (3+1)D LBs are touched. In contrast, the trapping phenomenon presented here in our work are based on (3+1)D LB with inverted-Y atomic gas (even with Rydberg gas [44][45][46]), and the trajectories of the localized wave packets can be controlled through an SG gradient magnetic field. The research results predicted here may not only open a route for the study of weak-light nonlinear optics but also have potential applications in the precision measurements and optical information processing and transmission (e.g., design of all-optical switching at very low light level).…”

Discrete time crystal in a finite chain of Rydberg atoms without disorder

“…Rydberg atoms of high principal numbers [44] experience strong dipole-dipole interactions that can be tailored under appropriate level configurations to realize a variety of effects, including dipole blockade [45], dipole antiblockade [46], cooperative nonlinearity [47,48], quantum many-body scars [49], and in-phase or antiphase dynamics [50]. Consequently, Rydberg atoms have been proven to be a promising platform for implementing many quantum tasks such as, e.g., the creation of quantum gates [51][52][53], the generation of entanglement states [54,55], or the realization of photonic devices [56][57][58]. Recently, new features of the collective dynamics of Rydberg atoms beyond equilibrium states have been studied under Floquet driving in the presence of disorder [59].…”

Discrete time crystal in a finite chain of Rydberg atoms without disorder

“…Rydberg atoms of high principal numbers [43] experience strong dipole-dipole interactions that can be tailored under appropriate level configurations in order to realize a variety of effects, including dipole blockade [44], dipole anti-blockade [45], cooperative nonlinearity [46,47], quantum many body scars [48], and in-phase/anti-phase dynamics [49]. Consequently, Rydberg atoms have been proven to be a promising platform for implementing many quantum tasks such as, e.g., the creation of quantum gates [50][51][52], the generation of entanglement states [53,54], or the realization of photonic devices [55][56][57]. Recently, new features of the collective dynamics of Rydberg atoms beyond equilibrium states have been studied under Floquet driving in the presence of disorder [58].…”