Christopher Cedzich

Christopher Cedzich

Institut für Theoretische Physik -- Quantum Information Group
Leibniz Universität Hannover
Appelstr. 2
30167 Hannover, Germany

Office: 010
Phone: +49 (0)511 762-17503
Email: christopher.cedzich@...
(replace "..." by itp.uni-hannover.de)

Research Interests

Discrete Time Quantum Lattice Systems: topological classifications, gauge fields, localization phenomena, quantum walks

Publications

Asymptotic behavior of quantum walks with spatio-temporal coin fluctuations
- with: A. Ahlbrecht, R. Matjeschk, V. B. Scholz, A. H. Werner, R. F. Werner
- arXiv: 1201.4839
- journal: Quantum Inf. Process. 11, 1219 (2012)
Quantum Walks with Non-Orthogonal Position States
- with: R. Matjeschk, A. Ahlbrecht, M. Enderlein, A. H. Werner, M. Keyl, T. Schaetz, R. F. Werner
- arXiv: 1206.0220
- journal: Phys. Rev. Lett. 109, 240503 (2012)
Propagation and spectral properties of quantum walks in electric fields
- with: T. Rybár, A. H. Werner, A. Alberti, M. Genske, R. F. Werner
- arXiv: 1302.2081
- journal: Phys. Rev. Lett. 111, 160601 (2013)
A quantum dynamical approach to matrix Khrushchev’s formulas
- with: F.A. Grünbaum, L. Velázquez, A. H. Werner, R. F. Werner
- arXiv: 1405.0985
- journal: Comm. Pure Appl. Math., 69(5):909-957 (2016)
Bulk-edge correspondence of one-dimensional quantum walks
- with: F. A. Grünbaum, C. Stahl, L. Velázquez, A. H. Werner, R. F. Werner
- arXiv: 1502.02592
- journal: J. Phys. A: Math. Theor., Volume 49, Number 21 (2016)
Revivals in Quantum Walks with quasi-periodically time-dependent coin
- with: R. F. Werner
- arXiv: 1510.08905
- journal: Phys. Rev. A 93, 032329 (2016)
The topological classification of one-dimensional symmetric quantum walks
- with: T. Geib, F. A. Grünbaum, C. Stahl, L. Velázquez, A. H. Werner, R. F. Werner
- arXiv: 1611.04439
- journal: Ann. Inst. Henri Poincaré, Volume 19, Issue 2 (2018)
Complete homotopy invariants for translation invariant symmetric quantum walks on a chain
- with: T. Geib, C. Stahl, L. Velázquez, A. H. Werner, R. F. Werner
- arXiv: 1804.04520
- journal: Quantum 2, 95 (2018)
Quantum walks in external gauge fields
- with: T. Geib, A. H. Werner, R. F. Werner
- arXiv: 1808.10850
- journal: J. Math. Phys., 60:012107 (2019)
Eigenvalue Measurement of Topologically Protected Edge states in Split-Step Quantum Walks
- with: T. Nitsche, T. Geib, C. Stahl, L. Lorz, S. Barkhofen, R. F. Werner, C. Silberhorn
- arXiv: 1811.09520
- journal: New J. Phys., 21 (4):043031 (2019)
Quantum walks: Schur functions meet symmetry protected topological phases
- with: T. Geib, F. A. Grünbaum, L. Velázquez, A. H. Werner, R. F. Werner
- arXiv: 1903.07494
Anderson localization for electric quantum walks and skew-shift CMV matrices
- with: A. H. Werner
- arXiv: 1906.11931
Singular continuous Cantor spectrum for magnetic quantum walks
- with: J. Fillman, T. Geib, A. H. Werner
- arXiv: 1908.09924
- journal: Lett. Math. Phys., 110;1141-1158
Chiral Floquet systems and quantum walks at half period
- with: T. Geib, A. H. Werner, R. F. Werner
- arXiv: 2006.04634

Conferences & Workshops

11/2011 - International Workshop on Theoretical Aspects of the Discrete Time Quantum Walk
- talk Quantum Walks random in space and time
- at Instituto de Fisica Corpuscular, Valencia
11/2012 - Quantum Walks in Grenoble
- talk Quantum Walks in Electric Fields
- at Institut Fourier, Université Grenoble Alpes
11/2012 - Workshop on Quantum Dynamics and Quantum Walks
- talk Quantum Walks in Electric Fields
- at Okazaki
11/2013 - Quantum simulations and quantum walks
- at Scuola Normale Superiore, Pisa
02/2014 - Quantum Information Processing
- poster Propagation and spectral properties of electric quantum walks
- at AXA Auditorium, Barcelona
02/2014 - Discrete and Analogue Quantum Simulators
- poster Propagation and spectral properties of electric quantum walks
- at Physikzentrum, Bad Honnef
11/2014 - Quantum Simulations and Quantum Walks
- talk Topological phenomena in 1D quantum walks
- at Centre for Quantum Technology, Durban
01/2015 - Symmetry and Topology in Quantum Matter
- poster Bulk-Edge correspondence of 1D quantum walks
- at Institute for Pure and Applied Mathematics, UCLA
11/2015 - Quantum Walks and Quantum Simulations
- talk Bulk-Edge correspondence of 1D quantum walks
- at Yokohama National University
01/2016 - DPG Spring Meeting
- talk Topological classification of one-dimensional symmetric quantum walks
- at Leibniz University Hannover
11/2016 - Workshop of Quantum Walks and Quantum Simulations
- talk Bulk-Edge - how about finite systems?
- at Czech Technical University, Prague
01/2017 - Séminaire CANA
- talk The gentleness of perturbations and the topological classification of quantum walks
- at Aix-Marseille Université
11/2017 - Seminar Talk
- talk The topological classification of 1D symmetric quantum walks
- at ETH Zürich
05/2018 - Search and Problem Solving by Random walks
- talk Propagation of quantum walks in electric fields
- at Physikzentrum, Bad Honnef
06/2018 - Quantum Rhineland Spring Meeting 2018
- talk Complete classification of symmetric 1D discrete quantum walks
- at Universität zu Köln
01/2020 - Quantum Simulations and Quantum Walks
- talk Quantum walks in external gauge fields
- at CIRM Marseille
05/2020 - QLUNCH Seminar
- talk Singular-continuous Cantor spectrum for quantum walks in magnetic fields
- at Centre for the Mathematics of Quantum Theory, Copenhagen

Supervision of Bachelor- and Master-Thesis

Uniform Sampling of Stabilizer States, Fabian Henze (Bachelor)
Bulk-edge correspondence for quantum walks of symmetry type DIII, Tobias Geib (Master)
Bulk-edge correspondence for one-dimensional quantum walks, Yannic Rath (Bachelor)
Quantum walks in magnetic fields, Christoph Stahl (Master)
Quantum walks in weak magnetic fields, Tobias Geib (Bachelor)

Teaching