Mathey_group
@MatheyGroup
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Hamburg, Germany
Joined September 2024
Great article by Andrea on our Shapiro steps: Physics - Stepwise Quantum Tunneling Seen in Ultracold Atoms
physics.aps.org
Trapped atoms exhibit discrete step-like behavior across a barrier, mimicking the quantum tunneling behavior in superconducting circuits.
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Excited to have our study on Shapiro steps out: Observation of Shapiro steps in an ultracold atomic Josephson junction | Science
science.org
The current-voltage characteristic of a driven superconducting Josephson junction displays discrete steps. This phenomenon, called the Shapiro steps, forms today’s voltage standard. In this work, we...
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Designing material properties by putting them into a cavity is promising route of material design. Recent study with Hector on cavity control of Raman-active matter: https://t.co/qengrC5AqH
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Making vortex rings in a condensate, via Shapiro dynamics: https://t.co/qTrEWwMJFs , joint study with Vijay, Luigi, and Herwig. Looks a little like smoke rings!
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Dial up the tunneling, between two Bose-Einstein condensates, and see the phases order! Recently demonstrated in collaboration with Chris' team and Vijay, here: https://t.co/OBNappr2W2
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A new platform to push next-gen electronics towards quantum coherence, patterned graphene nanoribbons: https://t.co/Dj1yAIiazq . Patterned electrodes provide control of the band structure to enable coherent electronics. Riek and Hector, this was fun!
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Tunneling is one of these quintessential, unintuitive quantum phenomena: particles overcoming barriers that they don't have the energy for, from a classical perspective. With Herwig and his team, and with Vijay and Luigi, we took a closer look, see here: https://t.co/Y0rUKYgbta
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📣New publication by CUI member L. Mathey et al. on "Observation of a bilayer superfluid with interlayer coherence" https://t.co/XJeUNiwWaf
@MatheyGroup @NatureComms
nature.com
Nature Communications - The authors report the implementation of a bilayer system of 2D ultracold Bose gases with controllable Josephson coupling. This allows characterisation of coupling-induced...
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Our latest work is out in Nat. Commun! We report the first observation of tunnelling-assisted superfluidity in bilayer 2D quantum gases - a robust platform for quantum simulation, from superconductors to QCD. Great collaboration with @unihh & @TIIuae. https://t.co/Ut5b4ozCT1
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Atomtronics is the scientific endeavor of building circuits out of quantum liquids. Here, we give the field a new twist, via rotating-box potentials: https://t.co/oh4nFUne83 Thanks to Kaspar and Vijay, for making this fun project a reality!
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📣New publication on "Detecting Phase Coherence of 2D Bose Gases via Noise Correlations" by i.a. CUI member L. Mathey 👉 https://t.co/uK3Tyve0Aj
@unihh @APSphysics
journals.aps.org
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)...
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📢New publication on "Torus Bifurcation of a Dissipative Time Crystal" by CUI members L. Mathey and A. Hemmerichet al. 👉 https://t.co/Jpm2VBCigQ
@PhysRevLett @Official_UPD @UniKonstanz
journals.aps.org
Using a quantum gas setup consisting of a Bose-Einstein condensate strongly coupled to a high-finesse optical cavity by a transverse pump laser, we experimentally observe an instability of a dissip...
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📢New publication on "Non-linear photoconductivity of strongly driven graphene" by CUI member L. Mathey and L. Broers https://t.co/GvZaz81pVv
#SciPost #graphene
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📣New publication on "Hybridization of the amplitude mode in a confined fermionic superfluid" by CUI members C. R. Cabrera, L. Mathey, H. Moritz et al. https://t.co/98sHeAo1UG
@APSphysics @dfg_public
journals.aps.org
This work reveals how confinement affects fundamental excitations in a fermionic superfluid. In particular, the hybridization of the amplitude mode with a spatial breathing mode of the condensed part...
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Designing atomtronic circuits via superfluid dynamics, Sarah Jährling et al #CondensedMatter #AtomicPhysics
https://t.co/4ktJd3eP8O
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Like ice in the sunshine, a limit torus melts away due to quantum fluctuations: https://t.co/zsjunsV5ao Big thanks to Caro and Kilian!
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Großartiger Erfolg! 👏 Die Uni Hamburg hat im Rahmen der Exzellenzstrategie den Zuschlag für vier Exzellenzcluster erhalten. Wir sind wieder dabei und freuen uns riesig!!! @desy @MPSDHamburg @EuropeanXFEL
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Looking forward to our upcoming workshop on Rydberg physics, organized by Aslam, Rohan, and Zeki! https://t.co/TFzXIl8Zlm
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Atomtronics is the field of building logical circuits out of cold atoms. Here is our newest circuit element, the Josephson parametric amplifier: https://t.co/Dl69GgtVio Fun collaboration with Vijay and Luigi!
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📢New publication on "Coherent control of photoconductivity in graphene nanoribbons" by CUI member L. Mathey, H. P. Ojeda Collado and L. Broers @PhysRevResearch @unihh
journals.aps.org
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...
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