Project description
Probing ultrafast spin dynamics in high critical temperature superconductors
Spin excitations in confined geometries open a wide range of opportunities for both fundamental and experimental research. However, the quantum magnetisation dynamics in nanomagnets remain largely unexplored, especially when it comes to non-homogeneous spin configurations. The EU-funded QFAST project aims to fill in some of this knowledge gap by investigating the quantum properties of magnetic vortices stabilised in low-damping ferromagnetic microdiscs at millikelvin temperatures. The project will be built upon quantum nanocircuits based on YBa2Cu3O7 nano superconducting quantum interference devices and coplanar waveguide resonators.
Objective
Nanoscopic spin excitations in confined geometries open a wide range of opportunities both for fundamental investigations and for applications. However, quantum magnetization dynamics in nanomagnets are still largely unexplored, especially when it comes to non-homogeneous spin configurations. QFaST is aimed at filling this gap by investigating quantum properties of magnetic vortices stabilized in low-damping ferromagnetic microdiscs at millikelvin temperatures. The project will be built upon quantum nanocircuits based on the high critical temperature superconductor YBa2Cu3O7 (YBCO) in the form of nano Superconducting Quantum Interference Devices (nanoSQUIDs) and coplanar waveguide resonators. On the one hand, quantum spin dynamics from quaistatic up to nanosecond timescales will be addressed with few Bohr magnetons-sensitivity and 100 nm spatial-resolution by implementing a broadband on-chip YBCO-nanoSQUID microscope. This will be combined with the possibility of locally probing and controlling the temperature of the sample and sending radiofrequency pulses. Among other issues, such facility will allow studying zero-point vacuum fluctuations of vortex gyration. On the other hand, the physics of vortex gyration will be addressed by quantum cavity electrodynamics. The first step towards this goal will be the experimental realization of vortex-photon hybrid states using YBCO resonators. Such achievement entails the exchange of vortex and photon populations in the form of Rabi oscillations. Based on this, strong coupling of high order vortex modes and cavity photons will be explored putting emphasis in the possibility of transducing single photons into coherent spin-waves. These studies will open new opportunities for future research, e.g. to transduce between microwave and optical photons or to manipulate and detect single quanta of vortex gyration, which are relevant for quantum information applications and detection of dark matter.
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.1. - EXCELLENT SCIENCE - European Research Council (ERC)
MAIN PROGRAMME
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Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
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Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
ERC-STG - Starting Grant
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Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) ERC-2020-STG
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28006 Madrid
Spain
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