Unveiling hidden topological phases of a one-dimensional Hadamard quantum walk

24 Jul 2015 Obuse Hideaki Asboth Janos K. Nishimura Yuki Kawakami Norio

Quantum walks, whose dynamics is prescribed by alternating unitary coin and shift operators, possess topological phases akin to those of Floquet topological insulators, driven by a time-periodic field. While there is ample theoretical work on topological phases of quantum walks where the coin operators are spin rotations, in experiments a different coin, the Hadamard operator is often used instead... (read more)

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  • MESOSCALE AND NANOSCALE PHYSICS
  • QUANTUM PHYSICS