Conditional phase-shift enhancement through dynamical Rydberg blockade

Year: 2017

Authors: Wu JH., Artoni M., Cataliotti F., La Rocca GC.

Autors Affiliation: Northeast Normal Univ, Ctr Quantum Sci, Changchun 130024, Jilin, Peoples R China; Northeast Normal Univ, Sch Phys, Changchun 130024, Jilin, Peoples R China; European Lab Nonlinear Spect LENS, I-50019 Florence, Italy; Brescia Univ, Dept Engn & Informat Technol, I-25133 Brescia, Italy; Brescia Univ, CNR, INO, I-25133 Brescia, Italy; Univ Florence, Dept Phys & Astron, I-50019 Florence, Italy; Scuola Normale Super Pisa, I-56126 Pisa, Italy; CNISM, I-56126 Pisa, 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.

Journal/Review: EUROPHYSICS LETTERS

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 Ministry of Foreign Affairs & International Cooperation and the National Natural Science Foundation of China. J-HW, MA, and GCLR would like to acknowledge the kind hospitality. respectively, in Pisa and in Changchun.
KeyWords: Rydberg states; Atomic beams; Ultracold plasma; Induced trasparency; Quantum gate; Photon; Atom
DOI: 10.1209/0295-5075/120/54002

Citations: 4
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