Dr Arkady Fedorov's research focuses on quantum phenomena in systems consisting of superconducting artificial atoms, microwave resonators and mechanical oscillators.

Dr Fedorov has worked in a variety of roles in the area of quantum physics including a three-year stint at TU Delft, The Netherlands conducting experiments with superconducting flux qubits. Later on he became a research scientist in ETH Zurich to continue research in the area of superconducting quantum devices.

Mentoring and training

Arkady has a proven track record of supervising and mentoring research students. To date, he has mentored eight students. He is currently supervising one PhD student at the University of Queensland. If you are interested in working or studying with Dr Arkady Fedorov, please contact him. 

PhD in Physics, Clarkson University, USA
Masters in Physics with Honours, St. Petersburg State University, Russia
Bachelors in Physics with Honours, St. Petersburg State University, Russia
Testing quantum contextuality with superconducting circuits

Grand challenge: Realise new capabilities through the development of a comprehensive and flexible quantum control toolkit.

Superconducting qubits are one of the leading platforms for quantum computation. The three lowest energy states of a superconducting artificial atom constitute the most logical realization of a qutrit: a system with almost equidistant energy levels. However, due to the latter property, realization of a projective measurement on a particular state without disrupting quantum coherence in two other states poses a substantial challenge to test KS inequality with superconducting qutrits. Using 3D superconducting qutrit of the transmon type incorporated into microwave cavity, we engineered the dispersive shifts of the cavity frequency for the first and second excited states to be identical. As a result, an observer cannot distinguish between these two states by measuring transmission of microwave radiation through the cavity. We experimentally tested that our scheme realizes the strong projective measurement on the ground state of a qutrit by measuring quantum coherence between different levels of the qutrit, a prerequisite for testing of contextuality. In the next step, we are going to use this property and our capabilities for quantum manipulation of the state of the qutrit for measurement of correlation for different pairs of observables in order to violate Kochen–Specker inequality.

Current Supervision

Doctor Philosophy - Principal Advisor

ARC Future Fellowship

(2015 to 2019)

Discovery - Projects, Australian Research Council

(2015 to 2019)

Design and characterisation of coherent 3D quantum circuits

UQ Early Career Researcher (ECR) grant, University of Queensland (2014)

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Major funding support

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