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Coherent control of spin chains in graphene nanostructures

Project description

Exploring correlated phenomena in advanced graphene architectures

Nuclear and electronic spins are pivotal elements poised to transform technology and science in the second quantum revolution. The ERC-funded CONSPIRA project aims to leverage these spins by integrating them into scalable platforms using graphene architectures. Using innovative methods such as scanning tunnelling microscopy and cavity quantum electrodynamics, the researchers will seek to manipulate and study quantum states. The goal is to push the boundaries of quantum computation and broaden understanding of correlated phenomena in condensed matter physics.

Objective

Elementary nuclear and electronic spins are called to be key components in the second quantum revolution. Their atomic-scale integration into scalable platforms with tunable interactions is a demand that I will address in CONSPIRA by synthetizing graphene architectures with interacting spin chains, using customized on-surface reactions of organic precursors, and by controlling their quantum state through microwave spectroscopies.

I envision the formation of collective magnetic states through the assembly of interacting electronic and nuclear spins in periodic arrays with atomically precise spacings. Through rational design and synthesis strategies, we will tune spin interactions via the graphene host and hyperfine coupling, with the goal of bringing the quantum state of the arrays into different regimes of energy, coherence, and topology.

To access the broad energy range of such multiscale interacting system and to probe its quantum dynamics, we will combine two antagonist experimental techniques like Scanning Tunnelling Microscopy (STM) and Cavity Quantum Electrodynamics (QED). This will be realized by incorporating superconducting coplanar waveguide resonators (CWRs) as substrate of a low temperature STM.

We will use QED techniques to couple the resonant states of spin chains with microwave photons of the resonator, while the STM tip acts as a local gate. The MHz and picometer resolution of this new type of spectrometer will enable us to study the quantum coherence of the spin arrays and undertake the coherent control of distant nuclear states entangled through the electronic spin system, a potential system for QED-based quantum computation.

CONSPIRA will provide a new platform for quantum spins, and methods to address and manipulate their coherent state. The combination of QED and STM represents a ground-breaking experimental development, which is called to boost studies of general correlated phenomena in condensed matter physics.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.

(opens in new window) ERC-2022-ADG

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Host institution

ASOCIACION CENTRO DE INVESTIGACION COOPERATIVA EN NANOCIENCIAS CIC NANOGUNE
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 2 988 750,00
Address
TOLOSA HIRIBIDEA 76
20018 San Sebastian
Spain

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Region
Noreste País Vasco Gipuzkoa
Activity type
Research Organisations
Links
Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 2 988 750,00

Beneficiaries (1)

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