Talk detail

Participant	Wcislo, Piotr
Institution	Nicolaus Copernicus University - Grudziadzka 5 - Torun - Kuj-Pom - Poland

Session	PT4	Accepted	Yes	Order	8	Time	18:15	20'
Talk	Oral abstract	Title	Dark matter searches within the intercontinental optical atomic clock network
Coauthors	Wcisło, P.; Ablewski, P.; Beloy, K., Bilicki, S.; Bober, M.; Brown, R.; Fasano, R.; Ciuryło, R.; Hachisu, H.; Ido, T.; Lodewyck, J.; Ludlow, A.; McGrew, W.; Morzyński, P.; Nicolodi, D.; Schioppo, M.; Sekido, M.; Le Targat, R.; Wolf, P.; Zhang, X.; Zjawin, B.; Zawada, M.
Abstract	We report preliminary results of dark mater searches within the worldwide network made of our laboratories. We demonstrate that data routinely collected by our currently oper-ating optical atomic clocks without any further developments of the experimental setups may be used to run a global program aimed on searches of dark matter. A standard optical atomic clock consists of two state-of-the-art components: an ultra-stable high-Q optical cavity which transfers stability of the length into stability of the frequency, and an atomic sample which transfers accuracy of the energy of the ultra-precise atomic clock transition into accuracy of the frequency. These two components have different susceptibilities to the external perturba-tions such as electric and magnetic fields, and to the possible changes of fundamental physi-cal constants. We use this property to derive new constraints for oscillating massive scalar fields [1] and topological defects in the scalar fields [2] couplings to standard matter exceeding previ-ously reported limits [3]. These constraints were obtained by tracking the imprint of these effects in the frequency difference between cavities and atoms of several synchronized clocks distributed worldwide. In this network of clocks, the technical noises (thermal noise, drift of cavities) is uncorrelated, while the effects we probe would yield correlations in remote meas-urements. As a consequence the optical clocks within our network do not have to be linked via phase-noise-compensated optical fibre links but only via a standard internet connection. References [1] A. Arvanitaki, J. Huang, K. Van Tilburg, Phys. Rev. D, vol. 91, p. 015015, 2015 [2] A. Derevianko, M. Pospelov, Nat. Phys, vol. 10, p. 933, 2014 [3] P. Wcisło, et al, Nat. Astron., vol 1, p. 0009, 2016; K. Van Tilburg, et al, Phys. Rev. Lett., vol. 115, p. 011802, 2015; B. M. Roberts, et al, Nat. Commun., vol 8, p. 1195, 2017; A. Hees, et al, Phys. Rev. Lett., vol. 117, p. 061301, 2016; T. Kalaydzhyan, N. Yu, Phys. Rev. D, vol. 96 p. 075007, 2017
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