Photonic quantum walks with four-dimensional coins

• Published in: Physical review research Vol. 1; no. 3; p. 033036
• Main Authors: Lorz, Lennart, Meyer-Scott, Evan, Nitsche, Thomas, Potoček, Václav, Gábris, Aurél, Barkhofen, Sonja, Jex, Igor, Silberhorn, Christine
• Format: Journal Article
• Language: English
• Published: American Physical Society 21.10.2019

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-dimensional coin operators are sufficient to define a certain range of dynamics on complex graphs, higher-dimensional coins ar...