Volume 120, Number 5, December 2017
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||22 February 2018|
Conditional phase-shift enhancement through dynamical Rydberg blockade
1 Center for Quantum Sciences and School of Physics, Northeast Normal University - Changchun 130024, China
2 European Laboratory for Nonlinear Spectroscopy (LENS) - 50019 Florence, Italy
3 Department of Engineering and Information Technology and Istituto Nazionale di Ottica (INO-CNR), Brescia University - 25133 Brescia, Italy
4 Department of Physics and Astronomy, University of Florence - 50019 Florence, Italy
5 Scuola Normale Superiore and CNISM - 56126 Pisa, Italy
Received: 31 August 2017
Accepted: 26 January 2018
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.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 32.80.Ee – Rydberg states / 42.65.-k – Nonlinear optics
© EPLA, 2018
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