Davide Calonico

TL;DR: The first field measurement campaign with a transportable optical lattice clock was reported in this article, where the authors used it to determine the gravity potential difference between the middle of a mountain and a location 90 km away.

TL;DR: This work has engineered fermionic ladders with synthetic magnetic flux in an experimental configuration that has allowed them to achieve uniform fluxes on a lattice with minimal requirements and unprecedented tunability and opens new directions for the investigation of topological states of matter with ultracold atomic gases.

TL;DR: These measurements set a stringent upper bound to a possible fractional time variation of the ratio between the two frequencies: d/dt ln([(nu(Rb))/(nu(Cs))]=(0.2+/-7.0)x 10(-16) yr(-1) (1sigma uncertainty).

TL;DR: In this article, the authors performed a comparison campaign of selected frequency references maintained in their laboratories during about 25 days in October/November 2004, using two-way satellite time and frequency transfer (TWSTFT) in an intensified measurement schedule of 12 equally spaced measurements per day.

TL;DR: It is found that ordinary submarine telecommunication cables can be used to detect earthquakes, and existing telecommunication optical fiber cables can detect seismic events when combined with state-of-the-art frequency metrology techniques by using the fiber itself as the sensing element.