Theory post-doc position in Grenoble: Quantum information thermodynamics with nano-electro-mechanical devices

A 2 years post-doctoral position is available to work on the theory of quantum information thermodynamics with spin and charge qubits in suspended Carbon Nanotubes (CNT). The research will be conducted in the theory group of Dr. A. Auffèves (Institut Néel, CNRS and University Grenoble Alpes) in close collaboration with the experimental group of Dr. N. Ares (Oxford). The position is part of the “Nanomechanics in the solid-state for Quantum information thermodynamics” project (NanoQit, 2020-2024) funded by the Foundational Questions Institute within the 2019 call “Information as a Fuel”.

Motivation and objectives

Quantum information thermodynamics is an emerging field that explores the fundamental laws governing information, entropy and energy in the quantum realm. While its roots are clearly fundamental (energetic footprints of quantum coherence and entanglement, nature of thermodynamic time arrow at the quantum scale…), its applications nowadays attract an increasing attention, since it has the potential to estimate and optimize the energetic bill of quantum technologies. Spin or charge qubits mechanically coupled to a suspended CNT are extremely appealing candidates to implement fundamental experiments of quantum information thermodynamics. The mechanical degree of freedom is indeed expected to behave as an embedded source of work [1,2], offering the unique opportunity to measure directly the nano-work exchanges for the first time. This new capacity unlocks the possibility of monitoring the flows of information, energy and entropy along various quantum information processing operations (erasure, quantum gates, entanglement generation, feedback…). Moreover, the baths interacting with the qubits are generally not thermal, inviting to extend the results of information thermodynamics to non-equilibrium baths. Such suspended CNT are successfully studied by the group of Dr Natalia Ares at the University of Oxford [3,4].

The theory post-doc hired within the NanoQit project will have the key role to leverage the huge potential of this experimental setup for quantum thermodynamic purposes. In strong collaboration with the whole consortium, she/he will contribute to the design, feasibility study and modeling of fundamental experiments in quantum information thermodynamics. Potential research topics include:

• The accurate modeling of the full quantum opto-mechanical setup (master equations, quantum trajectories)
• The build-up of a relevant thermodynamical framework to analyze the setup, e.g. involving the mechanical battery, as well as the non-equilibrium baths
• The design and study of new quantum engines extracting work from information, coherence or entanglement
• Thermodynamic analyzes of elementary quantum information processing operations implemented on the setup
• Study of the setup potential for stochastic quantum thermodynamics and the study of quantum fluctuation theorems

Collaborative environment

The post-doc will directly build on the expertise acquired by the group of A. Auffèves in quantum thermodynamics, quantum opto-mechanics and stochastic thermodynamics. Based at the Institute Néel, she/he will benefit from the vibrant environment of the Grenoble ecosystem for quantum technologies. She/he will work in close collaboration with the experimental group of N. Ares (Material Department, Oxford) and the theory groups of J. Anders (Exeter) and J. Parrondo (Madrid).

References

[1] C. Elouard, M. Richard and A. Auffèves, New J. Physics 17, 055018 (2015).

[2] J. Monsel, C. Elouard and A. Auffèves, npj Quantum Information 4:59 (2018).

[3] Y. Wen, et al, Nature Physics 16, 75 (2020).

[4] T. Pei, et al, Phys. Rev. Lett.  118, 177701 (2017).

Selection criteria

•  An excellent first degree and a completed doctorate (or close to completion) in physical sciences.
• A strong background in the theory and modeling of spin and charge qubits, opto-mechanics and/or in quantum optics.
• The ability to perform innovative and effective research in condensed matter evidenced by a strong publication record in peer-reviewed journals or pre-prints
• Ability to work in interdisciplinary projects (experiments, theory).
• Evidence of outstanding ability to work independently, and as an active collaborative member of a research team, who is well organized and self-motivated, while working cooperatively at all levels. Be highly motivated and have a strong commitment to research.
•  Good communication skills both orally and in written English, suitable for the preparation of scientific publications in world-class journals and presentation of research at international conferences.

Starting date:  Immediate

Duration: Up to 2 years

Contact : Send CV, supporting statement, and reference letters to Dr. Alexia Auffèves (alexia.auffeves@neel.cnrs.fr)