When geometric phases turn topological
Por:
Aguilar, P., Chryssomalakos, C., Guzman-Gonzalez, E., Hanotel, L., Serrano-Ensastiga, E.
Publicada:
1 ene 2020
Resumen:
Geometric phases, accumulated when a quantum system traces a cycle in quantum state space, do not depend on the parametrization of the cyclic path, but do depend on the path itself. In the presence of noise that deforms the path, the phase gets affected, compromising the robustness of possible applications, e.g. in quantum computing. We show that for a special class of spin states, called anticoherent, and for paths that correspond to a sequence of rotations in physical space, the phase only depends on topological characteristics of the path, in particular, its homotopy class, and is therefore immune to noise. © 2020 IOP Publishing Ltd.
Filiaciones:
Aguilar, P.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, PO Box 70-543, CDMX, México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, POB 70-543, Mexico City 04510, DF, Mexico
Chryssomalakos, C.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, PO Box 70-543, CDMX, México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, POB 70-543, Mexico City 04510, DF, Mexico
Guzman-Gonzalez, E.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, PO Box 70-543, CDMX, México, 04510, Mexico
Instituto de Física, Universidad Nacional Autónoma de México, PO Box 20-364, CDMX, México, 01000, Mexico
London Mathematical Laboratory, 18 Margravine Gardens, London, W6 8RH, United Kingdom
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, POB 70-543, Mexico City 04510, DF, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, POB 20-364, Mexico City 01000, DF, Mexico
London Math Lab, 18 Margravine Gardens, London W6 8RH, England
Hanotel, L.:
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, PO Box 70-543, CDMX, México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, POB 70-543, Mexico City 04510, DF, Mexico
Serrano-Ensastiga, E.:
Institut für Theoretische Physik, Universität Tübingen, Tübingen, 72076, Germany
Univ Tubingen, Inst Theoret Phys, D-72076 Tubingen, Germany
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