Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Helbig, Tobias"'
If we prepare an isolated, interacting quantum system in an eigenstate and perturb a local observable at an initial time, its expectation value will relax towards a thermal expectation value, even though the time evolution of the system is determinis
Externí odkaz:
http://arxiv.org/abs/2406.01448
Autor:
Helbig, Tobias Thimo
Next to the emergence of nearly isolated quantum systems such as ultracold atoms with unprecedented experimental tunability, the conceptualization of the eigenstate thermalization hypothesis (ETH) by Deutsch and Srednicki in the late 20th century has
Autor:
Stegmaier, Alexander, Brand, Hauke, Imhof, Stefan, Fritzsche, Alexander, Helbig, Tobias, Hofmann, Tobias, Boettcher, Igor, Greiter, Martin, Lee, Ching Hua, Bahl, Gaurav, Szameit, Alexander, Kießling, Tobias, Thomale, Ronny, Upreti, Lavi K.
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 non-adiabatic effects. In this work, we reali
Externí odkaz:
http://arxiv.org/abs/2306.15434
Autor:
Hohmann, Hendrik, Hofmann, Tobias, Helbig, Tobias, Imhof, Stefan, Brand, Hauke, Upreti, Lavi K., Stegmaier, Alexander, Fritzsche, Alexander, Müller, Tobias, Schwingenschlögl, Udo, Lee, Ching Hua, Greiter, Martin, Molenkamp, Laurens W., Kießling, Tobias, Thomale, Ronny
Publikováno v:
Phys. Rev. Research 5, L012041 (2023)
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:
http://arxiv.org/abs/2206.09931
Autor:
Chen, Anffany, Brand, Hauke, Helbig, Tobias, Hofmann, Tobias, Imhof, Stefan, Fritzsche, Alexander, Kießling, Tobias, Stegmaier, Alexander, Upreti, Lavi K., Neupert, Titus, Bzdušek, Tomáš, Greiter, Martin, Thomale, Ronny, Boettcher, Igor
Publikováno v:
Nat. Commun. 14, 622 (2023)
Curved spaces play a fundamental role in many areas of modern physics, from cosmological length scales to subatomic structures related to quantum information and quantum gravity. In tabletop experiments, negatively curved spaces can be simulated with
Externí odkaz:
http://arxiv.org/abs/2205.05106
Autor:
Lenggenhager, Patrick M., Stegmaier, Alexander, Upreti, Lavi K., Hofmann, Tobias, Helbig, Tobias, Vollhardt, Achim, Greiter, Martin, Lee, Ching Hua, Imhof, Stefan, Brand, Hauke, Kießling, Tobias, Boettcher, Igor, Neupert, Titus, Thomale, Ronny, Bzdušek, Tomáš
Publikováno v:
Nat. Commun. 13, 4373 (2022)
The Laplace operator encodes the behavior of physical systems at vastly different scales, describing heat flow, fluids, as well as electric, gravitational, and quantum fields. A key input for the Laplace equation is the curvature of space. Here we di
Externí odkaz:
http://arxiv.org/abs/2109.01148
Autor:
Stegmaier, Alexander, Imhof, Stefan, Helbig, Tobias, Hofmann, Tobias, Lee, Ching Hua, Kremer, Mark, Fritzsche, Alexander, Feichtner, Thorsten, Klembt, Sebastian, Höfling, Sven, Boettcher, Igor, Fulga, Ion Cosma, Schmidt, Oliver G., Greiter, Martin, Kiessling, Tobias, Szameit, Alexander, Thomale, Ronny
Publikováno v:
Phys. Rev. Lett. 126, 215302 (2021)
We employ electric circuit networks to study topological states of matter in non-Hermitian systems enriched by parity-time symmetry $\mathcal{PT}$ and chiral symmetry anti-$\mathcal{PT}$ ($\mathcal{APT}$). The topological structure manifests itself i
Externí odkaz:
http://arxiv.org/abs/2011.14836
Autor:
Weidemann, Sebastian, Kremer, Mark, Helbig, Tobias, Hofmann, Tobias, Stegmaier, Alexander, Greiter, Martin, Thomale, Ronny, Szameit, Alexander
Publikováno v:
Science (2020)
In the last two decades, the ubiquitous effect of dissipation has proven to entail astonishing non-Hermitian features, rather than just being an inescapable nuisance. As an alternative route to non-Hermiticity, we tailor the anisotropy of a lattice,
Externí odkaz:
http://arxiv.org/abs/2004.01990
Autor:
Hofmann, Tobias, Helbig, Tobias, Schindler, Frank, Salgo, Nora, Brzezińska, Marta, Greiter, Martin, Kiessling, Tobias, Wolf, David, Vollhardt, Achim, Kabaši, Anton, Lee, Ching Hua, Bilušić, Ante, Thomale, Ronny, Neupert, Titus
Publikováno v:
Phys. Rev. Research 2, 023265 (2020)
A system is non-Hermitian when it exchanges energy with its environment and non-reciprocal when it behaves differently upon the interchange of input and response. Within the field of metamaterial research on synthetic topological matter, the skin eff
Externí odkaz:
http://arxiv.org/abs/1908.02759
Autor:
Helbig, Tobias, Hofmann, Tobias, Imhof, Stefan, Abdelghany, Mohamed, Kiessling, Tobias, Molenkamp, Laurens W., Lee, Ching Hua, Szameit, Alexander, Greiter, Martin, Thomale, Ronny
The study of the laws of nature has traditionally been pursued in the limit of isolated systems, where energy is conserved. This is not always a valid approximation, however, as the inclusion of features like gain and loss, or periodic driving, quali
Externí odkaz:
http://arxiv.org/abs/1907.11562