Zobrazeno 1 - 10
of 123
pro vyhledávání: '"Oosterkamp, Tjerk H."'
We perform the first search for ultralight dark matter using a magnetically levitated particle. A sub-millimeter permanent magnet is levitated in a superconducting trap with a measured force sensitivity of $0.2\,\mathrm{fN/\sqrt{Hz}}$. We find no evi
Externí odkaz:
http://arxiv.org/abs/2409.03814
Autor:
Janse, Martijn, Uitenbroek, Dennis G., van Everdingen, Loek, Plugge, Jaimy, Hensen, Bas, Oosterkamp, Tjerk H.
Publikováno v:
Phys. Rev. Research 6, 033076 (2024)
A consistent theory describing the dynamics of quantum systems interacting on a classical space-time was recently put forward by Oppenheim et al..[1, 2]. Quantum states may retain their coherence, at the cost of some amount of stochasticity of the sp
Externí odkaz:
http://arxiv.org/abs/2403.08912
Autor:
Fuchs, Tim M., Uitenbroek, Dennis G., Plugge, Jaimy, van Halteren, Noud, van Soest, Jean-Paul, Vinante, Andrea, Ulbricht, Hendrik, Oosterkamp, Tjerk H.
Gravity differs from all other known fundamental forces since it is best described as a curvature of spacetime. For that reason it remains resistant to unifications with quantum theory. Gravitational interaction is fundamentally weak and becomes prom
Externí odkaz:
http://arxiv.org/abs/2303.03545
Autor:
Welker, Gesa, de Wit, Martin, Oosterkamp, Tjerk H., Mydosh, John A., Suter, Andreas, Prokscha, Thomas, Bossoni, Lucia
We performed depth-dependent low-energy muon spin spectroscopy ($\mu$SR) studies on three palladium 100 nm thin films, both undoped and doped with 170 ppm of iron. Muons implanted in the surface and substrate interface region probe an increased local
Externí odkaz:
http://arxiv.org/abs/2209.02002
Publikováno v:
J. Low Temp. Phys. 210, 588-609 (2023)
We report recent progress towards the realization of a sub-mK, low-vibration environment at the bottom stage of a dry dilution refrigerator for use in mechanical tests of quantum mechanics. Using adiabatic nuclear demagnetization, we have cooled a si
Externí odkaz:
http://arxiv.org/abs/2208.11750
Publikováno v:
Cryogenics Volume 98, March 2019, Pages 67-70
One of the major challenges in performing SQUID-detected Magnetic Resonance Force Microscopy (MRFM) at milliKelvin temperatures is the crosstalk between the radiofrequency (RF) pulses used for the spin manipulation and the SQUID-based detection mecha
Externí odkaz:
http://arxiv.org/abs/1810.12571
Autor:
de Wit, Martin, Welker, Gesa, Heeck, Kier, Buters, Frank M., Eerkens, Hedwig J., Koning, Gert, van der Meer, Harmen, Bouwmeester, Dirk, Oosterkamp, Tjerk H.
Publikováno v:
Review of Scientific Instruments, 90, 015112 (2019)
We present the design and implementation of a mechanical low-pass filter vibration isolation used to reduce the vibrational noise in a cryogen-free dilution refrigerator operated at 10 mK, intended for scanning probe techniques. We discuss the design
Externí odkaz:
http://arxiv.org/abs/1810.06847
Autor:
Bossoni, Lucia, Moursel, Laure Grand, Bulk, Marjolein, Simon, Brecht G., Webb, Andrew, van der Weerd, Louise, Huber, Martina, Carretta, Pietro, Lascialfari, Alessandro, Oosterkamp, Tjerk H.
Publikováno v:
Journal of Physics: Condensed Matter, Volume 29, Number 41 (2017)
Muon Spin Rotation is employed to investigate the spin dynamics of ferritin proteins isolated from the brain of an Alzheimer's disease (AD) patient and of a healthy control, using a sample of horse-spleen ferritin as a reference. A model based on the
Externí odkaz:
http://arxiv.org/abs/1702.07222
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Autor:
Oosterkamp, Tjerk H., Zaanen, Jan
Penrose has been advocating the view that the collapse of the wave function is rooted in the incompatibility between general relativity and quantum mechanics. On the basis of conceptual analysis, he arrived at an estimate for the collapse time. To be
Externí odkaz:
http://arxiv.org/abs/1401.0176