Varying Constants and Fundamental Cosmology – VARCOSMOFUN’16

Session

[VC-E] Varying constants – laboratory experiments

1-VC-E

13 Sept 2016, 14:00

Room 7

Conveners

[VC-E] Varying constants – laboratory experiments

• Ekkehard Peik (PTB)

[VC-E] Varying constants – laboratory experiments

• Ekkehard Peik (PTB)

63. Searching for variations of fundamental constants and dark matter using an atomic clock ensemble

Jocelyne Guéna (Observatoire de Paris)

13/09/2016, 14:00

parallel

The ratio of two atomic transition frequencies is by definition independent of the unit of frequency and therefore its value depends only on fundamental constants such as the fine-structure constant $\alpha$ or fundamental properties of particles like for instance the electron mass. Repeated measurements of frequency ratios performed in the laboratory, with suitable atomic structure...

81. Tabletop experiments using atomic dysprosium and ytterbium for tests of fundamental physics.

Dr Lykourgos Bougas (Johannes Gutenberg Universität)

13/09/2016, 14:30

parallel

Atomic dysprosium (Dy) and ytterbium (Yb) have proved to be valuable systems to study fundamental problems in modern physics. Their high atomic mass and their rich energy-level structure, which results in accidental degeneracies of opposite-parity energy states, make them ideal candidates for investigating parity-violating (PV) interactions. Dysprosium is particularly well-suited for searches...

70. Towards quantum logic spectroscopy of molecular ions

Prof. Piet Schmidt (PTB Braunschweig/LUH Hannover)

13/09/2016, 15:00

parallel

Precision spectroscopy is a driving force for the development of our physical understanding. A prime example is the search for variation of fundamental constants in laboratory experiments through the repeated frequency comparison of highly accurate frequency standards. It is advantageous to compare standards with a large difference in sensitivity of their transitions to a change in these...

66. Constraint on transient variations of fine-structure constants with optical atomic clocks

Piotr Wcislo (Nicolaus Copernicus University in Torun)

13/09/2016, 16:10

parallel

One of possible scenarios predicts that the dark matter (DM) may have a form of stable topological defects [1]. For nonzero DM coupling to standard-model particles, the encounter with such object would effectively result in temporary variation of fundamental constants. Recently it was proposed by Derevianko and Pospelov [2] that the networks of correlated atomic clocks may be used for such...