Roxanne Siadat is a Higher Scientist in the Optical Frequency Metrology group, currently working towards her PhD in collaboration with Imperial College London. Her experimental work focuses on the development and characterisation of NPL’s ytterbium optical lattice clock NPL-Yb1, with the aim of bringing it to the stage where it can make regular contributions to international atomic time as a secondary frequency standard. Her computational work, undertaken in collaboration with the International Bureau of Weights and Measures (BIPM), focuses on evaluating the impact of an optical redefinition of the second on recommended frequency values and on the stability of international atomic time.
Within the Optical Frequency Metrology group, Roxanne has also helped set up a new quantum test and evaluation capability at NPL’s Advanced Quantum Metrology Laboratory, funded through the UK’s National Quantum Technology Programme. She joined NPL in September 2022, having completed an MSci degree at the University of Birmingham. Her master’s project focused on modelling the uncertainty on the blackbody radiation shift in a strontium optical lattice clock.
Roxanne is a member of the Institute of Physics.
Areas of interest
- The different options for a future optical redefinition of the second
- Optical clocks to support international timekeeping
- High-resolution measurement of absolute frequencies and optical frequency ratios for optical clock comparisons
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