Assistant Professor of Theoretical Physics PhD 2006, University of Heidelberg
Sebastian Diehl’s research is located on the interface of quantum optics and many-body physics. In ultracold quantum gases, these areas increasingly merge together. Certain systems call for a description as open many-body systems, in which coherent and dissipative dynamics compete. This concerns natural occurrences of dissipation such as atom loss, but also instances of engineered driven-dissipative dynamics. There, dissipation may not occur as a perturbation, but rather as dominant resource of many-body dynamics, allowing for counter-intuitive effects such as dissipatively induced quantum order. A deeper understanding requires new theoretical tools, which combine concepts of quantum optics with modern field theoretical techniques.
Publications
Dissipation-Induced d-Wave Pairing of Fermionic Atoms in an Optical, S. Diehl, W. Yi, A. J. Daley, P. Zoller, Phys. Rev. Lett. 105, 227001 (2010).
Dynamical Phase Transitions and Instabilities in Open Atomic Many-Body Systems, S. Diehl, A. Tomadin, A. Micheli, R. Fazio, P. Zoller, Phys. Rev. Lett. 105, 015702 (2010).
Observability of Quantum Criticality and a Continuous Supersolid in Atomic Gases, S. Diehl, M. Baranov, A. J. Daley, P. Zoller, Phys. Rev. Lett. 104, 165301 (2010).
Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms, S. Diehl, A. Micheli, A. Kantian, B. Kraus, H. Buechler, P. Zoller, Nature Physics 4, 878 (2008).
Flow Equations for the BCS- BEC Crossover, S. Diehl, H. Gies, J. M. Pawlowski, C. Wetterich, Phys. Rev. A 76, 021602(R) (2007).
