Related papers: New constraints on dark matter from superconducting nanowires

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Probing Dark Matter-Electron Interactions with Superconducting Qubits [36.94429692322632]
Quantum device measurements are powerful tools to probe dark matter interactions.<n>Recent measurements of transmons have consistently measured, in various experimental setups, a residual contribution to the decoherence time unexplained by thermal noise or known external sources.<n>We use such measurements to set the most stringent laboratory-based constraints to date on dark matter-electron scattering at the keV scale and competitive constraints on dark photon absorption.
arXiv Detail & Related papers (2026-01-05T19:00:02Z)
Search for Dark Matter Scattering from Optically Levitated Nanoparticles [1.3445048453161086]
We search for momentum transfers that may originate from scattering of passing particle-like dark matter.<n>We also demonstrate the ability of using the inherent directional sensitivity of these sensors to separate possible dark matter signals from backgrounds.<n>Future extensions of the techniques developed here can enable searches for light dark matter and massive neutrinos that can reach sensitivity several orders of magnitude beyond existing searches.
arXiv Detail & Related papers (2025-08-01T17:49:06Z)
First direct search for light dark matter interactions in a transition-edge sensor [0.05185707610786574]
We propose the use of transition-edge sensor (TES) single-photon detectors as a simultaneous target and sensor for direct dark matter searches.<n>We perform a 489 h science run with a TES device optimized for the detection of 1064 nm photons, with a mass of 0.2 ng and an energy threshold of 0.3 eV.<n>With their excellent energy resolution, TESs enable search strategies that are complementary to recent results from superconducting nanowire single-photon detectors and kinetic inductance detectors.
arXiv Detail & Related papers (2025-06-23T18:00:03Z)
Electrically tunable quantum interference of atomic spins on surfaces [43.73138793116028]
We demonstrate electrical control of quantum interference using atomic spins on an insulating film in a scanning tunneling microscope.<n>We modulate the atomically-confined magnetic interaction between the probe tip and surface atoms with a strong electric field, and drive the spin state rapidly through the energy-level anticrossing.<n>Results open new avenues for all-electrical quantum manipulation in spin-based quantum processors.
arXiv Detail & Related papers (2025-06-01T14:28:36Z)
Probing Light Bosonic Dark Matter with Transmon Qubits [1.4714433237382947]
We show constraints on the parameter space of the dark photon, light scalar dark matter, and axion-like particles from the measurement of quasiparticles in transmon qubit experiments. This study offers insights for the development of quantum qubit experiments aimed at the direct detection of dark matter in underground laboratories.
arXiv Detail & Related papers (2024-12-30T10:41:46Z)
A New Bite Into Dark Matter with the SNSPD-Based QROCODILE Experiment [55.46105000075592]
We present the first results from the Quantum Resolution-d Cryogenic Observatory for Dark matter Incident at Low Energy (QROCODILE) The QROCODILE experiment uses a microwire-based superconducting nanowire single-photon detector (SNSPD) as a target and sensor for dark matter scattering and absorption. We report new world-leading constraints on the interactions of sub-MeV dark matter particles with masses as low as 30 keV.
arXiv Detail & Related papers (2024-12-20T19:00:00Z)
Long-range interactions in Weyl dense atomic arrays protected from dissipation and disorder [41.94295877935867]
Long-range interactions are a key resource in many quantum phenomena and technologies. We show how to design the polaritonic bands of these atomic metamaterials to feature a pair of frequency-isolated Weyl points. These Weyl excitations can thus mediate interactions that are simultaneously long-range, due to their gapless nature; robust, due to the topological protection of Weyl points; and decoherence-free, due to their subradiant character.
arXiv Detail & Related papers (2024-06-18T20:15:16Z)
Quantum thermodynamics with a single superconducting vortex [44.99833362998488]
We demonstrate complete control over dynamics of a single superconducting vortex in a nanostructure. Our device allows us to trap the vortex in a field-cooled aluminum nanosquare and expel it on demand with a nanosecond pulse of electrical current.
arXiv Detail & Related papers (2024-02-09T14:16:20Z)
Strongly Coupled Spins of Silicon-Vacancy Centers Inside a Nanodiamond with Sub-Megahertz Linewidth [43.06643088952006]
electron spin of a color center in diamond mediates interaction between a long-lived nuclear spin and a photon. We demonstrate strong coupling of its electron spin, while the electron spin's decoherence rate remained below 1 MHz. We furthermore demonstrate multi-spin coupling with the potential to establish registers of quantum memories in nanodiamonds.
arXiv Detail & Related papers (2023-12-14T14:17:35Z)
Electromagnetic field quantization in the presence of a moving nano-particle [0.0]
An appropriate Lagrangian is considered for a system comprising a moving nanoparticles in a semi-infinite space. Quantum friction experienced by high-velocity nanoparticles can be identified as a dissipative term in the radiation power of the nanoparticles.
arXiv Detail & Related papers (2023-11-29T21:18:16Z)
Dark matter detection using nuclear magnetization in magnet with hyperfine interaction [0.0]
We consider the possibility to detect cosmic light dark matter (DM), i.e., axions and dark photons, of mass $sim 10-6$ eV and $sim 10-4$ eV, by magnetic excitation in a magnet with strong hyperfine interaction.
arXiv Detail & Related papers (2023-07-14T14:52:52Z)
Fast Quantum Interference of a Nanoparticle via Optical Potential Control [0.0]
We introduce and theoretically analyze a scheme to prepare and detect non-Gaussian quantum states of an optically levitated particle. We show that this allows operating on short time- and lengthscales, which significantly reduces the demands on decoherence rates in such experiments.
arXiv Detail & Related papers (2022-07-25T21:28:12Z)
Near-monochromatic tuneable cryogenic niobium electron field emitter [48.7576911714538]
We describe electron field emission from a monocrystalline, superconducting niobium nanotip at a temperature of 5.9 K. The emitted electron energy spectrum reveals an ultra-narrow distribution down to 16 meV. This source will decrease the impact of lens aberration and enable new modes in low-energy electron microscopy, electron energy loss spectroscopy, and high-resolution vibrational spectroscopy.
arXiv Detail & Related papers (2022-05-11T20:46:21Z)
Ponderomotive squeezing of light by a levitated nanoparticle in free space [0.0]
A mechanically compliant element can be set into motion by the interaction with light. This light-driven motion can give rise to ponderomotive correlations in the electromagnetic field. cavities are often employed to enhance these correlations up to the point where they generate quantum squeezing of light.
arXiv Detail & Related papers (2022-02-18T07:57:36Z)
Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
arXiv Detail & Related papers (2020-07-31T01:48:57Z)
Quantum electromechanics with levitated nanoparticles [0.0]
In contrast to atomic systems with discrete transitions, nanoparticles exhibit a practically continuous absorption spectrum. We propose a pulsed scheme for the generation and read-out of motional quantum superpositions and entanglement between several levitated nanoparticles.
arXiv Detail & Related papers (2020-05-28T13:52:42Z)
Quantum coherent spin-electric control in a molecular nanomagnet at clock transitions [57.50861918173065]
Electrical control of spins at the nanoscale offers architectural advantages in spintronics. Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising. E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
arXiv Detail & Related papers (2020-05-03T09:27:31Z)
Impact of ionizing radiation on superconducting qubit coherence [43.13648171914508]
We show that environmental radioactive materials and cosmic rays contribute to an elevated quasiparticle density that would limit superconducting qubits of the type measured here to coherence times in the millisecond regime. Introducing radiation shielding reduces the flux of ionizing radiation and positively correlates with increased coherence time.
arXiv Detail & Related papers (2020-01-24T20:59:46Z)

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