Collapse and Inversion of the Josephson Potential in a Strongly Driven Superconducting Circuit

Posted by klaurent Delft

Kavli Affiliate: Gary Steele | Summary:Superconducting circuits embedding Josephson junctions leverage microwave drives for control and measurement of quantum states. Although increasing the drive power is desirable for improving the efficiency of these operations, it eventually triggers unwanted transitions to uncontrolled states. While careful choice of circuit symmetries and parameters can mitigate these effects, the […]


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Helium escaping from the atmosphere of a nearby rocky exoplanet orbiting in a habitable zone

Posted by klaurent Harvard

Kavli Affiliate: David Charbonneau | Summary:Observations of highly irradiated gas giant exoplanets have shown helium escaping from their atmospheres. There is limited evidence for atmospheres on rocky exoplanets, perhaps because they have already escaped. We report spectroscopic observations of LHS 1140b, a rocky exoplanet that orbits in the habitable zone of a nearby low-mass star. […]


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Benchmarking trigonometric continuous-variable gate primitives with trapped ions

Posted by klaurent Stanford

Kavli Affiliate: Susan Clark | Summary:Hybrid continuous-discrete-variable quantum processors can represent bosonic degrees of freedom directly in oscillator modes, or qumodes, while using qubits for control, readout, and nonlinear operations. Recently proposed trigonometric continuous-variable (CV) gate sets promote periodic functions of oscillator quadratures to elementary operations, making them natural primitives for compact variables, rotor models, […]


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Electric field controlled spin transport in a topological insulator interfaced with a ferroelectric antiferromagnet

Posted by klaurent Berkeley

Kavli Affiliate: Alessandra Lanzara | Summary:Topological insulators have been explored extensively for spin-charge interconversion via magnetic interfaces, yet the true response of their spin-charge conversion, particularly in the absence of an external magnetic field, remains to be studied. Here, we report electric-field control of spin-charge conversion in the topological insulator Bi$_2$Te$_3$ with the antiferromagnetic multiferroic […]


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Dark Energy and Neutrino Flavor from the Weak Axion

Posted by klaurent Chicago

Kavli Affiliate: Carlos Wagner | Summary:Dynamical dark energy offers an alternative to a cosmological constant with distinct observational signatures. However, the small energy density scale, Hubble-sized mass, and Planckian excursions make simple models fine-tuned and unnatural. In this work, we show that a weak version of the axion, identified with the phase field of the […]


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The Lightspeed project: high-speed, ultra-low read noise imaging and polarimetry for the Magellan telescopes

Posted by klaurent MIT

Kavli Affiliate: Gabor Furesz | Summary:Lightspeed will be an ultra-fast (> kHz), ultra-low read noise, multicolor (ugriz + IR) imager for the 6.5 meter Magellan Clay telescope. In a single-channel configuration, Lightspeed will also enable single-shot linear polarimetry, narrowband imaging, or white-light imaging. Lightspeed is designed around groundbreaking single-photon-resolving detector technologies: deep sub-electron read noise […]


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Pulsar anti-glitches: starquakes driven by magnetism?

Posted by klaurent Peking

Kavli Affiliate: Renxin Xu | Summary:In the conventional starquake model of pulsar glitches, it is usually assumed that such events arise from fault slip induced by the self-gravity of compact objects. This inevitably decreases the moment of inertia, producing a glitch with an amplitude of only $Δν/ν> 0$. However, an increasing number of anti-glitches ($Δν/ν< […]


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The JADES Transient Survey III: Linking Core-Collapse Supernova Rates to Cosmic Star Formation

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:We investigate how core-collapse supernova (CCSN) rates trace the star-formation rate densities (SFRDs) over the redshift range $0 le z le 5$. For this we use new high-redshift results from the James Webb Space Telescope Advanced Deep Extragalactic Survey (JADES) Transient Survey (JTS, see the companion paper by DeCoursey et […]


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The JADES Transient Survey II: Volumetric Supernova Rates out to z~5

Posted by klaurent Cambridge

Kavli Affiliate: Roberto Maiolino | Summary:The JADES Transient Survey (JTS) identified 83 supernova (SN) candidates in the JADES Deep Field, a $sim$25 arcmin$^2$ region with deep ($sim$30 mag) multi-band, multi-epoch JWST/NIRCam coverage. We use this sample to derive the first volumetric core-collapse (CC) SN and Type Ia (SN Ia) rates in the $z$$sim$2-5 range. Many […]


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Strong-to-Weak Spontaneous Symmetry Breaking from Wormholes in Holography

Posted by klaurent Tokyo

Kavli Affiliate: Masahito Yamazaki | Summary:We study strong-to-weak spontaneous symmetry breaking (SWSSB) at finite temperature and its implications in holography. SWSSB is a novel critical phenomenon that arises only in mixed states. We demonstrate SWSSB with the BTZ black hole and show that, in the bulk, it is realized through wormhole geometries connecting the two […]


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