Tracking the quantized information transfer at the edge of a chiral Floquet phase

Two-dimensional arrays of periodically driven qubits can host inherently dynamical topological phases with anomalous chiral edge dynamics. These chiral Floquet phases are formally characterized by a dynamical topological invariant, the chiral unitary index. Introducing a quantity called the chiral m...

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Veröffentlicht in:	Physical review. B 2018-08, Vol.98 (5), p.054309, Article 054309
Hauptverfasser:	Duschatko, Blake R., Dumitrescu, Philipp T., Potter, Andrew C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Information transfer Invariants Quantum phenomena Qubits (quantum computing)
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description	Two-dimensional arrays of periodically driven qubits can host inherently dynamical topological phases with anomalous chiral edge dynamics. These chiral Floquet phases are formally characterized by a dynamical topological invariant, the chiral unitary index. Introducing a quantity called the chiral mutual information, we show that this invariant can be precisely interpreted in terms of a quantized chiral transfer of quantum information along the edge of the system, and devise a physical setup to measure it.
doi_str_mv	10.1103/PhysRevB.98.054309
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subjects	Information transfer Invariants Quantum phenomena Qubits (quantum computing)
title	Tracking the quantized information transfer at the edge of a chiral Floquet phase
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