Conditional phase-shift enhancement through dynamical Rydberg blockade
Authors: Wu J.-H., Artoni M., Cataliotti F., La Rocca G.C.
Autors Affiliation: Center for Quantum Sciences and School of Physics, Northeast Normal University, Changchun, 130024, China; European Laboratory for Nonlinear Spectroscopy (LENS), Florence, 50019, Italy; Department of Engineering and Information Technology, Istituto Nazionale di Ottica (INO-CNR), Brescia University, Brescia, 25133, Italy; Department of Physics and Astronomy, University of Florence, Florence, 50019, Italy; Scuola Normale Superiore, CNISM, Pisa, 56126, Italy
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 p-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.
Volume: 120 (5) Pages from: 54002-1 to: 54002-6
More Information: This work is supported by the National Natural Science Foundation (Nos. 11534002 and 11674049) of China, the 111 Project (No. B13013) of China, and the Cooperative program (No. PGR00960) by the Italian MinistryKeyWords: Rydberg states; Atomic beams; Ultracold plasma; Induced trasparency; Quantum gate; Photon; AtomDOI: 10.1209/0295-5075/120/54002