Zobrazeno 1 - 10
of 127
pro vyhledávání: '"Sponar Stephan"'
We formulate a precise tradeoff relation between correlation and disturbance in a sequential quantum measurement setup. This relation, examined for qubit case, highlights key symmetry properties useful for the robust estimation and characterization o
Externí odkaz:
http://arxiv.org/abs/2410.21918
Autor:
Geerits, Niels, Hack, Simon, van Well, Ad, Parnell, Steven R., Abele, Hartmut, Sponar, Stephan
The broad band resonant spin echo interferometer, CANISIUS, is presented. CANISIUS is built in a versatile way, such that it can be operated in both a continuous broad band beam or a pulsed Time of Flight beam. This versatility also extends to the mo
Externí odkaz:
http://arxiv.org/abs/2408.06216
Autor:
Geerits, Niels, Sponar, Stephan, Steffen, Kyle E., Snow, William M., Parnell, Steven R., Mauri, Giacomo, Smith, Gregory N., Dalgliesh, Robert M., de Haan, Victor
A coupling between Earths rotation and orbital angular momentum (OAM), known as the Sagnac effect, is observed in entangled neutrons produced using a spin echo interferometer. After correction for instrument systematics the measured coupling is withi
Externí odkaz:
http://arxiv.org/abs/2407.09307
We use previously obtained experimental results by neutron interferometry to effectively constrain the parameter space of several prominent dark energy models. This investigation encompasses the environment-dependent dilaton field, a compelling conte
Externí odkaz:
http://arxiv.org/abs/2310.18109
Publikováno v:
Phys. Rev. Lett. 132, 260201 (2024)
We report on an experiment that demonstrates the violation of a Leggett-Garg inequality (LGI) with neutrons. LGIs have been proposed in order to assess how far the predictions of quantum mechanics defy macroscopic realism. With LGIs, correlations of
Externí odkaz:
http://arxiv.org/abs/2307.04409
Autor:
Danner, Armin, Geerits, Niels, Lemmel, Hartmut, Wagner, Richard, Sponar, Stephan, Hasegawa, Yuji
The paradoxical phenomenon of the quantum Cheshire Cat (qCC) refers to situations where different properties of a particle appear to be localised in different paths of an interferometer and therefore spatially separated. This observation is obtained
Externí odkaz:
http://arxiv.org/abs/2303.18092
Autor:
Wagner Richard, Brandl Laurids, Kersten Wenzel, Sponar Stephan, Hasegawa Yuji, Huber Christian, Bruckner Florian, Suess Dieter
Publikováno v:
EPJ Web of Conferences, Vol 219, p 10008 (2019)
Devices for manipulation of the neutron spin are vital for experiments in neutron optics such as neutron interferometry. Here we introduce a new type of such devices which are based on a magnetic material that can be 3D printed in complex shapes. We
Externí odkaz:
https://doaj.org/article/133d9329783644289cff7adc4f121da1
A combination of aluminium prisms inserted into a nested loop interferometer is used to generate a neutron phase vortex lattice with significant extrinsic orbital angular momentum, L_z=0.35, on a length scale of 220 microns, transverse to the propaga
Externí odkaz:
http://arxiv.org/abs/2205.00536
Autor:
Lemmel, Hartmut, Geerits, Niels, Danner, Armin, Hasegawa, Yuji, Hofmann, Holger F., Sponar, Stephan
Publikováno v:
Phys. Rev. Research 4, 023075 (2022)
It is commonly assumed that no accurate experimental information can be obtained on the path taken by a particle when quantum interference between the paths is observed. However, recent progress in the measurement and control of quantum systems may p
Externí odkaz:
http://arxiv.org/abs/2202.00272
Publikováno v:
Nat. Rev. Phys., 3 309 - 327 (2021)
Among the known particles, the neutron takes a special position, as it provides experimental access to all four fundamental forces and a wide range of hypothetical interactions. Despite being unstable, free neutrons live long enough to be used as tes
Externí odkaz:
http://arxiv.org/abs/2012.09048