79 citations · 165 across the 5 of their papers we have counts for
5 papers
Quantum photonics with active feedback loops
M. Engelkemeier, L. Lorz, Syamsundar De +5
We develop a unified theoretical framework for the efficient description of multiphoton states generated and propagating in loop-based optical networks which contain nonlinear elem…
Eigenvalue Measurement of Topologically Protected Edge states in Split-Step Quantum Walks
Thomas Nitsche, Tobias Geib, Christoph Stahl +5
We study topological phenomena of quantum walks by implementing a novel protocol that extends the range of accessible properties to the eigenvalues of the walk operator. To this en…
Photonic quantum walks with four-dimensional coins
Lennart Lorz, Evan Meyer-Scott, Thomas Nitsche +5
The dimensionality of the internal coin space of discrete-time quantum walks has a strong impact on the complexity and richness of the dynamics of quantum walkers. While two-dimens…
Supersymmetric polarization anomaly in photonic discrete-time quantum walks
Sonja Barkhofen, Lennart Lorz, Thomas Nitsche +2
Quantum anomalies lead to finite expectation values that defy the apparent symmetries of a system. These anomalies are at the heart of topological effects in fundamental, electroni…
Measuring Topological Invariants in Disordered Discrete Time Quantum Walks
Sonja Barkhofen, Thomas Nitsche, Fabian Elster +4
Quantum walks constitute a versatile platform for simulating transport phenomena on discrete graphs including topological material properties while providing a high control over th…