Stimulation of Quantum Phases by Time-Dependent Perturbations

Hamburg Photon Science Colloquium

  • Date: Jan 22, 2016
  • Time: 14:00 - 15:00
  • Speaker: Victor Galitski
  • University of Maryland, Joint Quantum Institute, College Park, USA
  • Location: CFEL (Bldg. 99)
  • Room: Seminar Room I-III, EG.076-080
  • Host: CFEL, CUI, DESY, European XFEL, HZG, MPSD, SFB 925, UHH
Stimulation of Quantum Phases by Time-Dependent Perturbations
I will review our theory work on dynamic stimulation of various quantum states. A key idea is that the thermal distribution is rarely optimal for occurrence of a given quantum state and dynamic perturbations can be used to enhance it. I will show how both Cooper pairing and phase coherence can be dynamically enhanced in both superconductors and cold atom superfluids. In the second part of the talk, I will discuss periodic-in-time (Floquet) perturbations that can be used to engineer electronic band structure at will in solid-state materials, enabling exotic quantum states to exist.
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