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Strongly correlated photons and electrons

Philipp Strack, Harvard University

24.07.2014 at 11:00 

Electronic quasiparticles are the best-developed carrier of energy and weakly interacting photons are the best candidate as carriers of (quantum) information. Future information technology will likely benefit from an improved understanding of strongly correlated non-Fermi liquid states in which the individual electrons lose their quasi-particle character and instead new, collective excitations provide transport and dynamics. Future optical applications will likely rely on strong photonic interactions in order to stop, manipulate, or generate light at the single photon level.
In this talk, I will discuss recent progress in the fundamental classification of such strongly interacting photonic [1,2] and non-Fermi liquid [3,4] phases of matter.

[1]: P. Strack, S. Choi, and M. D. Lukin, Photons in ultracold atomic Rydberg fibres behave like chiral electrons in metal wires, to appear (2014).

[2]: F. Piazza, and P. Strack: Umklapp Superradiance from a Collisionless Quantum Degenerate Fermi Gas, Phys. Rev. Lett. 112, 143003 (2014).

[3]: P. Jakubczyk, and P. Strack: Fluctuations of imbalanced fermionic superfluids in two dimensions induce continous quantum phase transitions and non-Fermi liquid behavior, Phys. Rev. X 4, 021012 (2014).

[4]: Y. Huh, P. Strack, and S. Sachdev: Vector Boson Excitations Near Deconfined Quantum Critical Points, Phys. Rev. Lett. 111, 166401 (2013).

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