PSAS 2012
International Conference on Precision Physics
of Simple Atomic Systems 2012
Eltville, Germany -
Information

Title:	Dr.
Family Name:	Matveev
First Name:	Artur
Gender:	male
E-Mail:	amatveevmpq.mpg.de
Affiliation for Badge:	Max Planck Institute of Quantum Optics
Institute:
Address (Street):	Hans-Kopfermann-Str. 1
Postal Code, City:	85748, Garching
Country:	Germany
Phone:	+49 89 32905106
Fax:	+49 89 32905200
Arrival Date:	June 10
Departure Date:	June 15
Excursion with Conference Dinner:	Selected
Payment:	Bank transfer to GSI
Title:	Search for Annual Variations of Hydrogen 1S-2S Frequency
Abstract:	High precision of the experimental determination of the 1S-2S transition frequency in atomic hydrogen allows various tests of modern fundamental theories. Search for long-term variations of this frequency has been previously used to constrain the drift of fine structure constant. Experimental constrains of the annual variations of the 1S-2S frequency can be used to constrain possible violations of Lorenz invariance. Here we report on our latest two measurements of the 1S-2S transition frequency which was conducted to set a new limit on the annual frequency variations. As frequency references we used the LNE-SYRTE transportable cesium fountain clock FOM and the stationary cesium fountain clock CSF1 at the Physikalisch-Technische-Bundesanstalt (PTB) in Braunschweig. The frequency reference from PTB has been transfered to MPQ utilizing a recently deployed 900 km long optical fiber link between the two institutes. Comparison of these measurements shows the relative frequency difference $\Delta f/f = (7.3\pm6.0)\times10^{-15}$. This allows us to constrain the linear combination of Lorenz boost symmetry violation parameters $0.95 c_{(TX)} - 0.29 c_{(TY)} - 0.08 c_{(TZ)} = (2.2 \pm 1.8)\times10^{-11}$ in the framework of the minimal Standard Model Extensions introduced by Kosteleck'{y} and coworkers.

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