Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Alexander Stegmaier"'
Autor:
Alexander Stegmaier, Hauke Brand, Stefan Imhof, Alexander Fritzsche, Tobias Helbig, Tobias Hofmann, Igor Boettcher, Martin Greiter, Ching Hua Lee, Gaurav Bahl, Alexander Szameit, Tobias Kießling, Ronny Thomale, Lavi K. Upreti
Publikováno v:
Physical Review Research, Vol 6, Iss 2, p 023010 (2024)
Quantized adiabatic transport can occur when a system is slowly modulated over time. In most realizations, however, the efficiency of such transport is reduced by unwanted dissipation, back-scattering, and nonadiabatic effects. In this paper, we real
Externí odkaz:
https://doaj.org/article/9235d9395c514053b63d5b266b4d5ec9
Autor:
Anffany Chen, Hauke Brand, Tobias Helbig, Tobias Hofmann, Stefan Imhof, Alexander Fritzsche, Tobias Kießling, Alexander Stegmaier, Lavi K. Upreti, Titus Neupert, Tomáš Bzdušek, Martin Greiter, Ronny Thomale, Igor Boettcher
Publikováno v:
Nature Communications, Vol 14, Iss 1, Pp 1-8 (2023)
Hyperbolic lattices emulate particle dynamics equivalent to those in negatively curved space, with connections to general relativity. Here, the authors use electric circuits with a novel complex-phase circuit element to simulate hyperbolic graphene w
Externí odkaz:
https://doaj.org/article/5e4a5bdb3f6a41a582ba369fe7e6e93f
Autor:
Patrick M. Lenggenhager, Alexander Stegmaier, Lavi K. Upreti, Tobias Hofmann, Tobias Helbig, Achim Vollhardt, Martin Greiter, Ching Hua Lee, Stefan Imhof, Hauke Brand, Tobias Kießling, Igor Boettcher, Titus Neupert, Ronny Thomale, Tomáš Bzdušek
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
Spaces with negative curvature are difficult to realise and investigate experimentally, but they can be emulated with synthetic matter. Here, the authors show how to do this using an electric circuit network, and present a method to characterize and
Externí odkaz:
https://doaj.org/article/f3e742da54644207a0c96ca9b44595a5
Autor:
Hendrik Hohmann, Tobias Hofmann, Tobias Helbig, Stefan Imhof, Hauke Brand, Lavi K. Upreti, Alexander Stegmaier, Alexander Fritzsche, Tobias Müller, Udo Schwingenschlögl, Ching Hua Lee, Martin Greiter, Laurens W. Molenkamp, Tobias Kießling, Ronny Thomale
Publikováno v:
Physical Review Research, Vol 5, Iss 1, p L012041 (2023)
We observe a localized cnoidal (LCn) state in an electric circuit network. Its formation derives from the interplay of nonlinearity and the topology inherent to a Su-Schrieffer-Heeger (SSH) chain of inductors. Varicap diodes act as voltage-dependent
Externí odkaz:
https://doaj.org/article/c5785a18ef454457af75e426e017603b
Autor:
Hendrik Hohmann, Tobias Hofmann, Tobias Helbig, Stefan Imhof, Hauke Brand, Lavi K. Upreti, Alexander Stegmaier, Alexander Fritzsche, Tobias Müller, Udo Schwingenschlögl, Ching Hua Lee, Martin Greiter, Laurens W. Molenkamp, Tobias Kießling, Ronny Thomale
We observe a localized cnoidal (LCn) state in an electric circuit network. Its formation derives from the interplay of non-linearity and the topology inherent to a Su-Schrieffer-Heeger (SSH) chain of inductors. Varicap diodes act as voltage-dependent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::600e4847dd76183060d6c2afcbda57b9
Autor:
Alexander Fritzsche, Tobias Helbig, Mark Kremer, Oliver G. Schmidt, Ronny Thomale, Igor Boettcher, Thorsten Feichtner, Stefan Imhof, Sebastian Klembt, Martin Greiter, Alexander Szameit, Ion Cosma Fulga, Libo Ma, Sven Höfling, Alexander Stegmaier, Tobias Kiessling, Tobias Hofmann, Ching Hua Lee
Publikováno v:
Physical Review Letters. 126
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry PT and chiral symmetry anti-PT (APT). The topological structure manifests itself in the complex admittance bands which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47d7617e18439e9fa9d0f415f0fa4931
https://doi.org/10.1103/physrevlett.126.215302
https://doi.org/10.1103/physrevlett.126.215302
Motivated by recent experimental breakthroughs in realizing hyperbolic lattices in superconducting waveguides and electric circuits, we compute the Hofstadter butterfly on regular hyperbolic tilings. By utilizing large hyperbolic lattices with period
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::085873a50c45d3442813d82cd18d6701
Autor:
Alexander, Stegmaier, Stefan, Imhof, Tobias, Helbig, Tobias, Hofmann, Ching Hua, Lee, Mark, Kremer, Alexander, Fritzsche, Thorsten, Feichtner, Sebastian, Klembt, Sven, Höfling, Igor, Boettcher, Ion Cosma, Fulga, Libo, Ma, Oliver G, Schmidt, Martin, Greiter, Tobias, Kiessling, Alexander, Szameit, Ronny, Thomale
Publikováno v:
Physical review letters. 126(21)
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry PT and chiral symmetry anti-PT (APT). The topological structure manifests itself in the complex admittance bands which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::b9a4babd91dbc07d36f2642fec1ebfca
https://pubmed.ncbi.nlm.nih.gov/34114871
https://pubmed.ncbi.nlm.nih.gov/34114871
Autor:
Tobias Hofmann, Martin Greiter, Alexander Stegmaier, Tobias Helbig, Mark Kremer, Alexander Szameit, Ronny Thomale, Sebastian Weidemann
Publikováno v:
Conference on Lasers and Electro-Optics.
Non-Hermiticity, induced by anisotropic coupling, makes the mode spectrum highly sensitive to the existence of boundaries. We demonstrate and exploit this behaviour experimentally in a photonic lattice to construct a light funnel.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2664ae9cace3a1867324e81b3d8fdcdc
https://doi.org/10.1364/cleo_qels.2020.fw3a.7
https://doi.org/10.1364/cleo_qels.2020.fw3a.7
Autor:
Tobias Hofmann, Alexander Szameit, Alexander Stegmaier, Tobias Helbig, Mark Kremer, Sebastian Weidemann, Martin Greiter, Ronny Thomale
Publikováno v:
Science (New York, N.Y.). 368(6488)
A topological light funnel Because most physical systems cannot be totally isolated from their environment, some degree of dissipation or loss is expected. The successful operation of such systems generally relies on mitigating for that loss. Mathema
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45fdc39b9512b86b8161f94ebc79382d
https://pubmed.ncbi.nlm.nih.gov/32217752
https://pubmed.ncbi.nlm.nih.gov/32217752