TRR 21:  Control of Quantum Correlations in Tailored Matter: Common Perspectives of Mesoscopic Systems and Quantum Gases

• Subject Area: Physics
• Term: from 2005 to 2017
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5486344

Quantum matter offers a rich variety of physical phenomena such as superfluidity, superconductivity and anomalous transport in low-dimensional electron systems. On the other hand, our understanding of the physical properties of nano- and mesoscopic quantum matter and quantum devices is limited. This is mostly due to the fact that these properties are governed by strong correlations and quantum effects, which are often difficult to treat in a complex environment. Therefore, systems that provide well defined geometries and dynamical control parameters are well suited to push our understanding of quantum matter. Our joint effort of quantum opticians and solid state physicists aims towards extending and exploiting the present ability to control and engineer many-body quantum systems by linking the common underlying physics in mesoscopic systems and quantum gases.
Our common goals will be:
-- find new states of matter,
-- tailor new dynamic cooperative quantum states,
-- understand the scaling behaviour of their properties from few body to many body physics,
-- probe and influence the effects of decoherence, and
-- control light-matter states.
Over the last years, rapid progress has been made in the ability to control quantum gases as interacting quantum matter in well defined geometries at ultra-low temperatures. On the other hand, mesoscopic systems and devices show in many respects very similar behaviour. Therefore it is our goal to exploit the physics, which is common to mesoscopic systems and quantum gases, to improve our understanding of quantum matter and transfer the progress on quantum control into materials science.

• DFG Programme: CRC/Transregios

Completed projects

• A01 - Simple and Complex Quantum Dot Systems as Model Systems for Investigating and Controlling Coherence and Correlation Effects (Project Heads von Klitzing, Klaus ;  Weis, Jürgen ;  Wharam, David )
• A02 - Dipolar quantum gases (Project Heads Griesmaier, Axel ;  Pfau, Tilman ;  Santos, Luis )
• A03 - Light-matter states with magnetic molecules (Project Heads Dressel, Martin ;  Scheffler, Marc )
• A04 - Abstimmbare Dekohärenz in atomaren Quantenpunkten (Project Heads Pfau, Tilman ;  Stuhler, Jürgen ;  Weiss, Ulrich )
• A05 - Tailored 0-Pi Josephson junctions as a macroscopic quantum system (Project Heads Goldobin, Edward ;  Kleiner, Reinhold ;  Schleich, Wolfgang )
• A06 - Transport through quantum dots out of equilibrium (Project Head Muramatsu, Alejandro )
• A07 - Controlling many-body quantum systems (Project Heads Calarco, Tommaso ;  Montangero, Simone )
• A08 - Charged impurities in an ultracold gas of atoms (Project Head Hecker Denschlag, Johannes )
• B01 - Stark korrelierte Quantengase in optischen Gittern (Project Heads Muramatsu, Alejandro ;  Walser, Reinhold ;  Weitz, Martin )
• B02 - Ultrakalte Atome in nichtstandard optischen Gittern (Project Head Santos, Luis )
• B04 - Strongly correlated fermions in and out of equilibrium (Project Heads Büchler, Hans Peter ;  Deissler, Benjamin ;  Hecker Denschlag, Johannes ;  Muramatsu, Alejandro ;  Wessel, Ph.D., Stefan )
• B05 - Nichtgleichgewichtsdynamik atomarer Gase in Fallenpotentialen mit kontrollierbaren geometrischen Formen (Project Heads Schleich, Wolfgang ;  Walser, Reinhold )
• B06 - Ordered states in strongly interacting Rydberg gases (Project Heads Büchler, Hans Peter ;  Pfau, Tilman )
• B07 - Mixtures in dynamical lattices (Project Head Zimmermann, Claus )
• B08 - Resonant dipole-dipole interactions with polar molecules (Project Heads Büchler, Hans Peter ;  Wessel, Ph.D., Stefan )
• B10 - Excitonic energy transport in Rydberg gases (Project Heads Hofferberth, Ph.D., Sebastian ;  Löw, Robert )
• B11 - Quantum simulator with engineered spin arrays in diamond (Project Heads Jelezko, Fedor ;  Kaiser, Ute ;  Plenio, Martin Bodo )
• C01 - Dynamik kollektiver Atom-Licht-Zustände (Project Head Weitz, Martin )
• C02 - Superconducting microtraps (Project Heads Ankerhold, Joachim ;  Dahm, Thomas ;  Fortágh, József ;  Kölle, Dieter )
• C03 - Coherent Control in coupled quantum dot systems (Project Heads Jetter, Michael ;  Michler, Peter ;  Schmidt, Oliver G. )
• C04 - Diamond defect centers (Project Heads Jelezko, Fedor ;  Neumann, Philipp ;  Wrachtrup, Jörg )
• C05 - Micro Ion traps (Project Head Schmidt-Kaler, Ferdinand )
• C09 - Molecular nanostructures and quantum gases (Project Head Fortágh, József )
• C10 - Interactions between Cold Atoms and Nanostructures (Project Head Judd, Thomas )
• C11 - Quantum coherence in light-harvesting complexes (Project Heads Ghosh, Robin ;  Huelga, Susana ;  Jelezko, Fedor ;  Plenio, Martin Bodo )
• MGK - Integrated research training group (Project Heads Huelga, Susana ;  Jelezko, Fedor ;  Kleiner, Reinhold ;  Löw, Robert ;  Schleich, Wolfgang ;  Schmidt-Kaler, Ferdinand ;  Weis, Jürgen )
• Z - Central tasks of the Transregional Collaborative Research Centre SFB / TRR 21 (Project Head Pfau, Tilman )
• Ö - CO.CO.MAT goes public (Project Heads Fortágh, József ;  Löw, Robert ;  Pfau, Tilman )

• Applicant Institution: Universität Stuttgart
• Co-Applicant Institution: Eberhard Karls Universität Tübingen; Universität Ulm
• Spokesperson: Professor Dr. Tilman Pfau