Zobrazeno 1 - 10
of 1 631
pro vyhledávání: '"ATOMIC INTERFEROMETRY"'
Sensitive detection of magnetic field is one of the open problem in metrology. Here, we propose an Mach-Zehnder atomic interferometry to sensitively detect the very weak local magnetic field, which is expelled by the superconductor (as the "testing m
Externí odkaz:
http://arxiv.org/abs/2205.07063
Autor:
Volkoff, T. J., Martin, Michael J.
Publikováno v:
Phys. Rev. Research 4, 013236 (2022)
Twist-untwist protocols for quantum metrology consist of a serial application of: 1. unitary nonlinear dynamics (e.g., spin squeezing or Kerr nonlinearity), 2. parameterized dynamics $U(\phi)$ (e.g., a collective rotation or phase space displacement)
Externí odkaz:
http://arxiv.org/abs/2104.06532
Publikováno v:
New J. Phys. (2019) 21 093037
Implementation of the quantum interferometry concept to spin-1 atomic Bose-Einstein condensates is analyzed by employing a polar state evolved in time. In order to identify the best interferometric configurations, the quantum Fisher information is ma
Externí odkaz:
http://arxiv.org/abs/1901.10716
Autor:
Brax, Philippe, Davis, Anne-Christine
Publikováno v:
Phys. Rev. D 94, 104069 (2016)
Atomic interferometry can be used to probe dark energy models coupled to matter. We consider the constraints coming from recent experimental results on models generalising the inverse power law chameleons such as $f(R)$ gravity in the large curvature
Externí odkaz:
http://arxiv.org/abs/1609.09242
Autor:
Ragole, Stephen, Taylor, Jacob M.
Publikováno v:
Phys. Rev. Lett. 117, 203002 (2016)
Atom interferometers provide exquisite measurements of the properties of non-inertial frames. While atomic interactions are typically detrimental to good sensing, efforts to harness entanglement to improve sensitivity remain tantalizing. Here we expl
Externí odkaz:
http://arxiv.org/abs/1601.02549
Publikováno v:
J. Phys. A: Math. Theor. 45, 165303 (2012)
The coherence effects induced by external photons coupled to matter waves inside a Mach-Zehnder three-grating interferometer are analyzed. Alternatively to atom-photon entanglement scenarios, the model considered here only relies on the atomic wave f
Externí odkaz:
http://arxiv.org/abs/1006.0450
Publikováno v:
Europhys.Lett.90:30006,2010
High sensitivity measurements in atomic spectroscopy were recently used in Amelino-Camelia et. al. to constraint the form of possible modifications of the energy-momentum dispersion relation resulting from Lorentz invariance violation (LIV). In this
Externí odkaz:
http://arxiv.org/abs/0912.2712
Autor:
Caves, Carlton M., Shaji, Anil
Atomic (qubit) and optical or microwave (modal) phase-estimation protocols are placed on the same footing in terms of quantum-circuit diagrams. Circuit equivalences are used to demonstrate the equivalence of protocols that achieve the Heisenberg limi
Externí odkaz:
http://arxiv.org/abs/0909.0803
Autor:
Göklü, Ertan, Lämmerzahl, Claus
Publikováno v:
Gen.Rel.Grav.43:2065-2088,2011
Space--time can be understood as some kind of space--time foam of fluctuating bubbles or loops which are expected to be an outcome of a theory of quantum gravity. One recently discussed model for this kind of space--time fluctuations is the holograph
Externí odkaz:
http://arxiv.org/abs/0908.3797
Autor:
Cadoret, Malo, De Mirandes, Estefania, Cladé, Pierre, Guellati-Khélifa, Saïda, Schwob, Catherine, Nez, François, Julien, Lucile, Biraben, François
Publikováno v:
The European Physical Journal Special Topics 163 (2008) 101
We use Bloch oscillations to transfer coherently many photon momenta to atoms. Then we can measure accurately the ratio h/m_Rb and deduce the fine structure constant alpha. The velocity variation due to the Bloch oscillations is measured thanks to Ra
Externí odkaz:
http://arxiv.org/abs/0809.3167