PhD position at the University of Basel (Switzerland): development of a single-ion optical clock

A PhD position is available in the group of Prof. Stefan Willitsch at the University of Basel (Switzerland) on the development of a single-ion optical clock in collaboration with the Swiss Federal Institute of Metrology, the Paul Scherrer Institute and ETH Zurich within the new Swiss National Competence Center of Research “Precision”.

Project description

Over the past years, optical clocks based on precision spectroscopic measurements in trapped neutral atoms or atomic ions have achieved fractional frequency uncertainties below the 10-18 level—corresponding to an accumulated timing error of less than one second over the age of the universe. This extreme level of precision enables fundamentally new measurement capabilities. Optical clocks can act as ultra-sensitive probes for relativistic geodesy, provide robust frequency references for next-generation navigation systems, and enable stringent tests for fundamental physical theories as well as for uncovering new physics. At the same time, their precision now surpasses the current SI definition of the second, which is based on a microwave transition in cesium limited at the 10-16 level. This progress has encouraged international efforts to redefine the SI second based on optical transitions.

The present PhD project aims at the development of a next-generation time and frequency standard for Switzerland in close collaboration with the Swiss Federal Institute of Metrology (METAS), the Paul Scherrer Institute in Villigen and ETH Zurich. A new single-ion optical clock will be developed, characterised and evaluated with the goal of contributing to next-generation frequency metrology and the future redefinition of the second. The clock will eventually be deployed at METAS and distributed to laboratories all over Switzerland via stabilised optical-fibre links. This new clock will form a cornerstone of the new Swiss National Competence Center of Research “Precision” which unites 30 research groups in the country with the aim to uncover new physics through precision measurements. For further information, please refer to www.nccr-precision.ch.

Applications

Applicants should have an MSc degree in physics or a related discipline, preferably with experience in experimental quantum science, quantum optics, or spectroscopy. The PhD position will be embedded in the the new Swiss National Competence Center for Research “Precision” (www.nccr-precision.ch), the Basel PhD program on “Quantum Computing and Quantum Technology” (QCQT, https://phdschoolqcqt.unibas.ch/en/) and the Basel Quantum Center (www.quantum.unibas.ch).

Inquiries and applications should be sent to Prof. Stefan Willitsch ([email protected]) and include a cover letter, a curriculum vitae, a list of publications (if applicable), transcripts of degree certificates and the contact details of at least two referees. Applications are accepted until the position has been filled.