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"Topological quantum optics: from the simulation of the Haldane model to applications in quantum information"

Dr. Dawei Wang
Texas A&M University


Last week, Dr. Abanov gave a very intriguing talk on the skymions in magnetic materials. Following the same physics but with a very different representation, I will introduce our interesting findings of topological effects in quantum optics. I will show the quantum optical simulation of the Haldane model [1], which has played an important role in the development of topological insulators. The simulation was done in a new lattice structure, coined the superradiance lattice [2]—a momentum-space lattice composed by timed Dicke states (single photon super radiant states) [3] in electromagnetically induced transparency. The superradiance lattice contains other striking physics such as the breaking of time-reversal symmetry by an effective electric field (instead of a magnetic field), which results in a new design of an optical diode [4]. A variation of the Haldane model can also be realized in a cavity QEW system, which involves with synthetic spin-orbit coupling and effective magnetic fields for photons in a Fock-state lattice [5]. New features of the chiral edge transportation (synchronized and no dispersive) of photons enable the quantum no demolition measurement of a spin and the preparation of the Schrodinger cat states of photons. This research offers a new platform for designing novel optical devices that can serve as the elementary components in quantum information.

[1] D.-W. Wang, H. Cai, L. Yuan, S.-Y. Zhu and R.-B. Liu, Optica 2, 712 (2015); [2] D.-W. Wang, R.-B. Liu, S.-Y. Zhu and M.O. Scully, PRL 114, 043602 (2015); [3] D.-W. Wang and M. O. Scully, PRL 113, 083601 (2014); [4] D.-W. Wang, H.-T. Zhou, M.-J. Guo, J.-X. Zhang, J. Evers and S.-Y. Zhu, PRL 110, 093901 (2013); [5] D.-W. Wang, H. Cai, R.-B. Liu and M. O. Scully, PRL 116, 220502 (2016).

Tuesday, February 14, 2017
IQSE Seminar Room (578 MPHY), 12:00 Noon
Mitchell Physics Building

Institute for Quantum Science and Engineering
Texas A&M University

(Pizza, salad and soda to be served at 11:45 a.m.)