Zobrazeno 1 - 10
of 32 217
pro vyhledávání: '"Mathey A"'
We study the photoconductivity response of graphene nanoribbons with armchair edges in the presence of dissipation using a Lindblad-von Neumann master equation formalism. We propose to control the transport properties by illuminating the system with
Externí odkaz:
http://arxiv.org/abs/2410.10957
The current-voltage characteristic of a driven superconducting Josephson junction displays discrete steps. This phenomenon, discovered by Sydney Shapiro, forms today's voltage standard. Here, we report the observation of Shapiro steps in a driven Jos
Externí odkaz:
http://arxiv.org/abs/2409.03340
Akademický článek
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Autor:
Serrano, Esteban, Bailleul, Damien, Désévédavy, Frédéric, Béjot, Pierre, Gadret, Grégory, Mathey, Pierre, Smektala, Frédéric, Kibler, Bertrand
Simultaneously increasing the spectral bandwidth and average output power of mid-infrared supercontinuum sources remains a major challenge for their practical application. We address this issue through experimental developments of short tapered rods
Externí odkaz:
http://arxiv.org/abs/2407.12351
Autor:
Cabrera, Cesar R., Henke, René, Broers, Lukas, Skulte, Jim, Collado, H. P. Ojeda, Biss, Hauke, Mathey, Ludwig, Moritz, Henning
Fermionic pairing and the superfluid order parameter change dramatically in low-dimensional systems such as high-T$_c$ superconductors. Here we show how the order parameter dynamics, which defines essential collective properties, is modified by stron
Externí odkaz:
http://arxiv.org/abs/2407.12645
Autor:
Sunami, Shinichi, Singh, Vijay P., Rydow, Erik, Beregi, Abel, Chang, En, Mathey, Ludwig, Foot, Christopher J.
We measure the noise correlations of two-dimensional (2D) Bose gases after free expansion, and use them to characterize the in-situ phase coherence across the Berezinskii-Kosterlitz-Thouless (BKT) transition. The noise-correlation function features a
Externí odkaz:
http://arxiv.org/abs/2406.03491
Akademický článek
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We present an iterative optimal control method of quantum systems, aimed at an implementation of a desired operation with optimal fidelity. The update step of the method is based on the linear response of the fidelity to the control operators, and it
Externí odkaz:
http://arxiv.org/abs/2404.10462
Autor:
Broers, Lukas, Mathey, Ludwig
We propose a formalism that captures the algebraic structure of many-body two-level quantum systems, and directly motivates an efficient numerical method. This formalism is based on the binary representation of the enumeration-indices of the elements
Externí odkaz:
http://arxiv.org/abs/2404.09312
Autor:
Oghittu, Lorenzo, Simonet, Juliette, Wessels-Staarmann, Philipp, Drescher, Markus, Sengstock, Klaus, Mathey, Ludwig, Negretti, Antonio
Publikováno v:
Phys. Rev. Research 6, 023024 (2024)
We investigate the dynamics of an ion moving through a homogeneous Bose-Einstein condensate (BEC) after an initial momentum is imparted. For this, we derive a master equation in the weak-coupling limit and Lamb-Dicke approximation for the reduced den
Externí odkaz:
http://arxiv.org/abs/2404.05347