Jonathan B. Curtis
@jbcurtis2
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Post-doc and friendly neighborhood mad scientist | interactions between quantum matter and light | ETH Zurich | views only my own
Zurich, Switzerland
Joined January 2019
RT @PhysRevB: PRB Editors' Suggestion: Probing the #BerezinskiiKosterlitzThouless vortex unbinding transition in 2D #superconductors using….
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Our recent work on detecting topological phase transitions in 2D superconductors using NV noise magnetometry has been selected for an Editors Suggestion! Read more here: @NarangLab.
journals.aps.org
Understanding the dynamics of vortices in superconductors is crucial in two dimensions, since these materials are expected to undergo a topological Berezinskii-Kosterlitz-Thouless (BKT) phase...
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RT @VictorGalitski: I am thrilled to announce that our open-science hub @Science_Cast just received a $100,000 award from NASA to further….
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I am so happy to finally share our preprint with y'all! In this we show how spin-qubit sensors, as found in diamonds, can be used to probe the topological BKT phase transition in 2D superconductors! @NarangLab, @harvardphysics @ETH_en @QuantumSciCtr.
arxiv.org
The melting of quasi-long-range superconductivity in two spatial dimensions occurs through the proliferation and unbinding of vortex-antivortex pairs -- a phenomenon known as the...
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Some recent work of ours has been featured here! @NarangLab.
Today, computers use electron movement to encode & process data. In the future, they could use ripples in magnetic fields called magnons to do it. Scientists @UCLA & partners caused magnons to interact in a way that's a crucial step towards computing:
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If/when this site finally implodes, I am also on Threads at jonbcurtis.
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RT @Ike_Saul: People ask me all the time if I am "pro-Israel" because I am a Jew who has lived in Israel, and my answer is that being "pro-….
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The inability of the American “progressive” left (incl. elected officials) to unequivocally condemn the terror attacks by Hamas, even as American citizens are killed/held hostage speaks volumes about their priorities.
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Update: finally received the expected email from admin, which essentially is the same for all UC as I understand.
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I get an email every day from @ucla alerting me that someone in a campus of 44k students someone has covid, but I still haven’t heard a peep condemning outright terrorism and civilian massacre… somehow seems so on brand these days.
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RT @sentefmi: Our KITP workshop "Quantum optics of correlated electrons" is taking place in early 2025. More info and application here: htt….
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Now that it looks like LK-99 is receding I can finally delete this app.
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This suggests that disorder is less important in curved spaces and weak-localization may only occur when spatial curvature is exactly zero -- making it much less robust than expected.
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We present an analysis that suggests this is only true in flat spaces. In spaces with negative spatial curvature the corresponding corrections due to these self-intersecting trajectories become less relevant and at long times particles can wander off to infinity.
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In 2D any disorder is thought to lead to Anderson localization. As particles scatter off impurities they randomly walk. In 2D this always returns to the starting point. Quantum interference then leads to a constructive interference of the wavefunction, localizing the particle.
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Allow me to interrupt LK-99 news with something completely different. here we argue that, similar to topology, negative geometric curvature of a manifold can suppress Anderson localization effects @NarangLab @JQInews.
arxiv.org
The interplay between disorder and quantum interference leads to a wide variety of physical phenomena including celebrated Anderson localization -- the complete absence of diffusive transport due...
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I am getting more and more confused by LK-99. it seems to have flat bands (=correlation?), and levitation + R(T) drop. OTOH flat bands nominally favor localization and small SF density. OTOOH it looks metallic in R(T) in 100K Tc sample and has nonstandard B field dependence. .
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Out now! We looked at what happens when you combine topology, interactions, and fluctuations in a Weyl semimetal. In certain regimes of doping we find that spatial inhomogeneities can spontaneously develop, leading to a rich and complicated magnetoelectric texture.
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New PRL! We show preformed triplet pairs in graphene can be stabilized by magnetic field or spin-orbit coupling, possibly explaining a few recent independent expts @NarangLab @harvardphysics @ETH_en
journals.aps.org
A recent experiment showed that a proximity-induced Ising spin-orbit coupling enhances the spin-triplet superconductivity in Bernal bilayer graphene. Here, we show that, due to the nearly perfect...
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