Dr. Daniel Braak

DFG group leader
Theoretical Physics III
Phone: +49-(0)-821-598-3710
Email:
Room: 445 (S)
Address: Universitätsstraße 1 (Physik Süd), 86159 Augsburg

DFG group leader

Principal Investigator of the research project "Exact solutions of strongly interacting models of quantum optics", supported by Deutsche Forschungsgemeinschaft (DFG), project number 439943572.

 

 

Research Interests

  • strong light-matter interaction
  • integrable systems; definitions of quantum integrability
  • quantum mechanics in Hilbert spaces of analytic functions; spectral theory
  • topological properties of condensed matter
  • quantum thermodynamics
 

Selected Publications

 

Publications

2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2007 | 2005 | 2002 | 2001 | 1999 | 1994 | 1993

2024

Daniel Braak, Lei Cong, Hans-Peter Eckle, Henrik Johannesson und Elinor K. Twyeffort
Spectral continuum in the Rabi–Stark model [invited]

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2023

Daniel Braak
Spectral determinant of the two‐photon quantum Rabi model

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2022

Daniel Braak, Murray T. Batchelor und Qing-Hu Chen
Comment on 'Parameter-dependent unitary transformation approach for quantum Rabi model'

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Zu-Jian Ying, Simone Felicetti, Gang Liu und Daniel Braak
Critical quantum metrology in the non-linear quantum Rabi model

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Stefan Gorol, Florian Loder, Daniel Braak, Arno P. Kampf und Thilo Kopp
Signatures of topological phase transitions in the S‐Wave superconductor at finite temperature

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2021

Philipp Bredol, Hans Boschker, Daniel Braak und Jochen Mannhart
Decoherence effects break reciprocity in matter transport

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Xiang-You Chen, Liwei Duan, Daniel Braak und Qing-Hu Chen
Multiple ground-state instabilities in the anisotropic quantum Rabi model

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Cid Reyes-Bustos, Daniel Braak und Masato Wakayama
Remarks on the hidden symmetry of the asymmetric quantum Rabi model

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2020

Daniel Braak und Jochen Mannhart
Fermi's golden rule and the second law of thermodynamics

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2019

Patrick Seiler, Elias Lettl, Daniel Braak und Thilo Kopp
Antilocalization in oxides: effective spin-3/2 model

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Jochen Mannhart und Daniel Braak
Lossless currents at high temperatures

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Jochen Mannhart, Philipp Bredol und Daniel Braak
Phase filters for a novel kind of asymmetric transport – scientific prospects and opportunities for possible applications

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Aram Manaselyan, Wenchen Luo, Daniel Braak und Tapash Chakraborty
Seeking Maxwell's Demon in a non-reciprocal quantum ring

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Daniel Braak
Symmetries in the quantum Rabi model

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Patrick Seiler, Elias Lettl, Daniel Braak und Thilo Kopp
Weak antilocalization within a genuine multiband model

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2018

Patrick Seiler, Jone Zabaleta, Robin Wanke, Jochen Mannhart, Thilo Kopp und Daniel Braak
Antilocalization at an oxide interface

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2017

M. Sanz, Daniel Braak, E. Solano und I. L. Egusquiza
Entanglement classification with algebraic geometry

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Florian Loder, Arno P. Kampf, Thilo Kopp und Daniel Braak
Momentum-space spin texture in a topological superconductor

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2016

Daniel Braak
Analytical solutions of basic models in quantum optics

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Daniel Braak, Qing-Hu Chen, Murray T. Batchelor und Enrique Solano
Semi-classical and quantum Rabi models: in celebration of 80 years

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Liwei Duan, You-Fei Xie, Daniel Braak und Qing-Hu Chen
Two-photon Rabi model: analytic solutions and spectral collapse

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2015

Liwei Duan, Shu He, Daniel Braak und Qing-Hu Chen
Solution of the two-mode quantum Rabi model using extended squeezed states

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S. Felicetti, J. S. Pedernales, I. L. Egusquiza, G. Romero, L. Lamata, Daniel Braak und E. Solano
Spectral collapse via two-phonon interactions in trapped ions

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2014

Daniel Braak, J. M. Zhang und Marcus Kollar
Integrability and weak diffraction in a two-particle Bose–Hubbard model

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Jie Peng, Zhongzhou Ren, Daniel Braak, Guangjie Guo, Guoxing Ju, Xin Zhang und Xiaoyong Guo
Solution of the two-qubit quantum Rabi model and its exceptional eigenstates

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2013

Daniel Braak
A generalized G-function for the Quantum Rabi Model

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J. M. Zhang, Daniel Braak und Marcus Kollar
Bound states in the one-dimensional two-particle Hubbard model with an impurity

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Daniel Braak
Continued fractions and the Rabi model

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F. A. Wolf, F. Vallone, G. Romero, Marcus Kollar, E. Solano und Daniel Braak
Dynamical correlation functions and the quantum Rabi model

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Daniel Braak
Solution of the Dicke model for N=3

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2012

J. M. Zhang, Daniel Braak und Marcus Kollar
Bound states in the continuum realized in the one-dimensional two-particle Hubbard model with an impurity

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F. Alexander Wolf, Marcus Kollar und Daniel Braak
Exact real-time dynamics of the quantum Rabi model

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2011

Daniel Braak
Integrability of the Rabi model

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2007

Daniel Braak
Conductivity of a quasiperiodic system in two and three dimensions

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2005

Joachim Deisenhofer, Daniel Braak, Hans-Albrecht Krug von Nidda, Joachim Hemberger, R. M. Eremina, V. A. Ivanshin, A. M. Balbashov, G. Jug, T. Kimura, Yoshinori Tokura und Alois Loidl
Observation of a Griffiths phase in paramagnetic La1-xSrxMnO3

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2002

Frieder Kalisch und Daniel Braak
Exact density of states for finite Gaussian random matrix ensembles via supersymmetry

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2001

Daniel Braak und Natan Andrei
On the spectrum of the XXZ-chain at roots of unity

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1999

Daniel Braak und Natan Andrei
Physical picture of the gapped excitation spectrum of the one-dimensional Hubbard model

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1994

Daniel Braak, F. Sievers und Klaus G. Ziegler
Competition of phonons and magnetic interaction in one-dimensional Fermion systems

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1993

Daniel Braak
Spontaneous magnetization in the disorder-dominated phase of the two-dimensional random-bond Ising model

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