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János Asbóth

senior researcher
Faculty of Natural Sciences, Budapest University of Technology

János Asbóth is associate professor at the Department of Theoretical Physics of BUTE, and senior research associate at the Wigner RCP, Department of Quantum Optics and Quantum Information. His research interests include quantum optics, quantum information, especially the application of topology to problems in condensed matter physics and quantum information. He introduced a computable measure of classicality of quantum states, based on their entanglement potential. He has explored hidden topological invariants of quantum walks, in international collaborations (Leiden, Paris, Dresden). Together with colleagues, he developed a university course introducing the basic phenomena of topological insulators using simple theoretical models, which he taught in Bonn, Geneva, and Budapest. He is scientific secretary of the National Quantum Technology Program, and recipient of the Junior Prima prize.

Selected publications:

Spectral flow and global topology of the Hofstadter butterfly
JK Asbóth, A Alberti
Physical review letters 118 (21), 216801 (2017)

A Short Course on Topological Insulators
JK Asbóth, L Oroszlány, A Pályi
Lecture Notes in Physics, Berlin Springer Verlag 919 (2015)

Symmetries, topological phases, and bound states in the one-dimensional quantum walk
JK Asbóth
Physical Review B 86 (19), 195414 (2012)

Computable measure of nonclassicality for light
JK Asbóth, J Calsamiglia, H Ritsch
Physical Review Letters 94 (17), 173602 (2005)

Coherent-state qubits: entanglement and decoherence
JK Asbóth, P Adam, M Koniorczyk, J Janszky
Eur. Phys. J. D 30, 403-410 (2004)

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  • Realization of a quantum communication network
  • Elementary building blocks of quantum information
  • Quantum computation and simulating quantum systems

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