Overview of project B07

Unifying Theoretical Description of Relaxation in Electron Systems

König, Kratzer, Schützhold

The project aims at theoretically understanding the complex many-body dynamics in electronic systems driven by an external stimulus. The coupling strengths to the available relaxation channels govern which relaxation mechanism is the dominating one. This may change from stage to stage of the equilibration process after the stimulus. It may, furthermore, differ from system to system. The aim of this project is to develop a comprehensive picture of these relaxation phenomena by intertwining different theoretical approaches. This will be achieved by collaborative development and application of methods interfacing the sub-disciplines of the PIs.

figure B7

Figure: Energy distribution of hot electrons in a Pb/Si(111) thin film at various time steps (in femtoseconds, fs) after excitation by a laser pulse



Philipp Stegmann, Jürgen König and Björn Sothmann
Relaxation Dynamics in Double-Spin Systems
Phys. Rev. B 101, 075411 (2020)
DOI: 10.1103/PhysRevB.101.075411

Eric Kleinherbers, Nikodem Szpak, Jürgen König and Ralf Schützhold
Relaxation Dynamics in a Hubbard Dimer Coupled to Fermionic Baths: Phenomenological Description and its Microscopic Foundation
Phys. Rev. B 101, 125131 (2020)
DOI: 10.1103/PhysRevB.101.125131

Naser Ahmadiniaz, T. E. Cowan, R. Sauerbrey, Ulrich Schramm, Hans-Peter Schlenvoigt and R. Schützhold
Heisenberg Limit for Detecting Vacuum Birefringence
Phys. Rev. D 101, 116019 (2020)
DOI: 10.1103/PhysRevD.101.116019

Matthias Wittemer, Jan-Philipp Schröder, Frederick Hakelberg, Philip Kiefer, Christian Fey, Ralf Schützhold, Ulrich Warring and Tobias Schaetz
Trapped-Ion Toolkit for Studies of Quantum Harmonic Oscillators under Extreme Conditions: Playback of Extreme Conditions
Phil. Trans. Roy. Soc. London, Ser. A 378, 0230 (2020)
DOI: 10.1098/rsta.2019.0230



Friedemann Queisser and Ralf Schützhold
Environment-Induced Prerelaxation in the Mott-Hubbard Model
Phys. Rev. B 99, 155110 (2019)
DOI: 10.1103/PhysRevB.99.155110

Johannes Oertel and Ralf Schützhold
WKB Approach to Pair Creation in Spacetime-Dependent Fields: The Case of a Spacetime-Dependent Mass
Phys. Rev. D 99, 125014 (2019)
DOI: 10.1103/PhysRevD.99.125014

Leonhard Klar, Nikodem Szpak and Ralf Schützhold
Quantum Simulation of Spontaneous Pair Creation in 2D Optical Lattices

Nikodem Szpak and Ralf Schützhold
Time Reversal and Quantum Loschmidt Echo in Optical Lattices

Peter Kratzer and Maedeh Zahedifar
Relaxation of Electronically Confined States in Pb/Si(111) Thin Films from Master Equation with First-Principles-Derived Rates

Sascha Lang and Ralf Schützhold
Analog of Cosmological Particle Creation in Electromagnetic Waveguides
Phys. Rev. D 100, 065003 (2019)
DOI: 10.1103/PhysRevD.100.065003

Matthias Wittemer, Frederick Hakelberg, Philip Kiefer, Jan-Philipp Schröder, Christian Fey, Ralf Schützhold, Ulrich Warring and Tobias Schaetz
Phonon Pair Creation by Inflating Quantum Fluctuations in an Ion Trap
Phys. Rev. Lett. 123, 180502 (2019)
DOI: 10.1103/PhysRevLett.123.180502

Friedemann Queisser, Sebastian Schreiber, Peter Kratzer and Ralf Schützhold
Boltzmann Relaxation Dynamics of Strongly Interacting Spinless Fermions on a Lattice
Phys. Rev. B 100, 245110 (2019)
DOI: 10.1103/PhysRevB.100.245110

Friedemann Queisser and Ralf Schützhold
Dynamically Assisted Nuclear Fusion
Phys. Rev. C 100, 041601 (2019)
DOI: 10.1103/PhysRevC.100.041601



Malte F. Linder, Axel Lorke and Ralf Schützhold
Analog Sauter-Schwinger Effect in Semiconductors for Spacetime-Dependent Fields
Phys. Rev. B 97, 035203 (2018)
DOI: 10.1103/PhysRevB.97.035203

Thomas Stegmann and Nikodem Szpak
Current Splitting and Valley Plarization in Elastically Deformed Graphene
2D Materials 6, 015024 (2018)
DOI: 10.1088/2053-1583/aaea8d

Sebastian Gartzke and Andreas Osterloh
Generalized W State of Four Qubits with Exclusively the Three-Tangle
Phys. Rev. A 98, 052307 (2018)
DOI: 10.1103/PhysRevA.98.052307

Christian Fey, Tobias Schaetz and Ralf Schützhold
Ion-trap Analog of Particle Creation in Cosmology
Phys. Rev. A 98, 032704 (2018)
DOI: 10.1103/PhysRevA.98.033407



Andreas Osterloh and Ralf Schützhold
Four-Concurrence in the Transverse XY Spin-½ Chain
Phys. Rev. A 96, 012331 (2017)
DOI: 10.1103/PhysRevA.96.012331

Jens Sonntag, Annika Kurzmann, Martin Paul Geller, Friedemann Queisser, Axel Lorke and Ralf Schützhold
Giant Magneto-Photoelectric Effect in Suspended Graphene
New J. Phys. 19, 063028 (2017)
DOI: 10.1088/1367-2630/aa739d

Konstantin Krutitsky, Andreas Osterloh and Ralf Schützhold
Avalanche of Entanglement and Correlations at Quantum Phase Transitions
Sci. Rep. 7, 3634 (2017)
DOI: 10.1038/s41598-017-03402-8