Results 31 to 40 of about 2,237 (83)

Relaxation oscillations, stability, and cavity feedback in a superradiant Raman laser

, 2013
We experimentally study the relaxation oscillations and amplitude stability properties of an optical laser operating deep into the bad-cavity regime using a laser-cooled $^{87}$Rb Raman laser.
A. E. Siegman, James K. Thompson, Joshua M. Weiner, Justin G. Bohnet, Kevin C. Cox, Zilong Chen   +5 more
core   +1 more source

Investigation of the Gravitational Potential Dependence of the Fine-Structure Constant Using Atomic Dysprosium [PDF]

, 2007
Radio-frequency E1 transitions between nearly degenerate, opposite parity levels of atomic dysprosium were monitored over an eight month period to search for a variation in the fine-structure constant.
A. Cingöz, A. Lapierre, A.-T. Nguyen, D. Budker, J. R. Torgerson, L. Hand, N. Leefer, S. J. Ferrell, S. K. Lamoreaux, V. V. Flambaum   +9 more
core   +1 more source

On dilatons with intrinsic decouplings

, 2016
In this paper, we show that there exists a class of dilaton models with non-trivial scalar-Ricci and scalar-matter couplings that strongly reduces observational deviations from general relativity in the dust limit.
Hees, Aurélien, Minazzoli, Olivier
core   +2 more sources

Constraints on Hidden Photon Models from Electron g-2 and Hydrogen Spectroscopy

, 2012
The hidden photon model is one of the simplest models which can explain the anomaly of the muon anomalous magnetic moment (g-2). The experimental constraints are studied in detail, which come from the electron g-2 and the hydrogen transition frequencies.
A. Hansson, B. deB. Darwent, C. E. Moore, C. E. Moore, C. E. Moore, C. E. Moore, C. E. Moore, C. E. Moore, Go Mishima, J. Flowers, J. Prades, Koichi Hamaguchi, Motoi Endo, V. Popov   +13 more
core   +1 more source

Precision Measurement of Transition Matrix Elements via Light Shift Cancellation

, 2012
We present a method for accurate determination of atomic transition matrix elements at the 10^{-3} level. Measurements of the ac Stark (light) shift around "magic-zero" wavelengths, where the light shift vanishes, provide precise constraints on the ...
Herold, C. D., Li, X., Porto, J. V., Rolston, S. L., Safronova, M. S., Vaidya, V. D.   +5 more
core   +1 more source

Probing new intra-atomic force with isotope shifts

, 2017
In the development of atomic clocks, some atomic transition frequencies are measured with remarkable precision. These measured spectra may include effects of a new force mediated by a weakly interacting boson.
Mikami, Kyoko, Tanaka, Minoru, Yamamoto, Yasuhiro   +2 more
core   +1 more source

Quantum Forces from Dark Matter and Where to Find Them

, 2018
We observe that sub-GeV Dark Matter (DM) induces Casimir-Polder forces between nucleons, that can be accessed by experiments from nuclear to molecular scales.
Fichet, Sylvain
core   +2 more sources

Transition frequency shifts with fine structure constant variation for Fe II: Breit and core-valence correlation correction

, 2007
Transition frequencies of Fe II ion are known to be very sensitive to variation of the fine structure constant \alpha. The resonance absorption lines of Fe II from objects at cosmological distances are used in a search for the possible variation of ...
C. E. Moore, D. Reimers, I. I. Tupitsyn, K. V. Koshelev, M. G. Kozlov, P. Bogdanovich, P. Molaro, S. A. Levshakov, S. G. Porsev, V. F. Bratsev   +9 more
core   +1 more source

Born approximation for scattering of wave packets on atoms. I. Theoretical background for scattering of a wave packet on a potential field

, 2015
Laser photons carrying non-zero orbital angular momentum are known and exploited during the last twenty years. Recently it has been demonstrated experimentally that such (twisted) electrons can be produced and even focused to a subnanometer scale.
Karlovets, D. V., Kotkin, G. L., Serbo, V. G.   +2 more
core   +1 more source

Light new physics in coherent neutrino-nucleus scattering experiments

, 2015
Experiments aiming to detect coherent neutrino-nucleus scattering present opportunities to probe new light weakly-coupled states, such as sub-GeV mass dark matter, in several extensions of the Standard Model.
deNiverville, Patrick, Pospelov, Maxim, Ritz, Adam   +2 more
core   +1 more source