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Phase-Locked Photon-Electron Interactions for Ultrafast Spectroscopy beyond T2

Project description

Characterising decoherence dynamics with unprecedented temporal resolution

Quantum coherence, the ability of quantum systems to maintain a stable relationship between different quantum states, is essential for quantum computing. Decoherence – losing this property – results in a statistical ensemble of states rather than a coherent combination of pure ones, moving from the quantum mechanics realm to the classical one. Advancing quantum computing will require understanding decoherence dynamics via unprecedented temporal resolution beyond T2, a decay constant called ‘dephasing time’ related to a shift in the phase of a qubit. The ERC-funded UltraSpecT project aims to make this possible leveraging electron wave packet shaping with light, 3D electron-driven photon sources, and correlative measurements in solid-state-based photonic systems and quantum networks.

Objective

Based on my groundbreaking advancements in realizing internal radiation sources inside electron microscopes, generating ultrashort and coherent electromagnetic radiations in interaction with electron beams, I propose to develop a platform for ultrafast and phase-locked electron-beam spectroscopy of solid-state-based quantum networks, beyond the dephasing time T2. My platform relies on the following key elements: (i) shaping electron wavepackets with light, (ii) implementing three-dimensional electron-driven photon sources, and (iii) employing correlative measurements to unravel the quantum statistics of photons evolving in solid-state-based photonic systems and quantum networks. This scenario enables an outstanding temporal resolution and an unprecedented degree of mutual coherence between the radiation sources and the near-field of the electron wavepacket itself. By combining these capabilities, I aim to map the excitation/emission paths, quasi-particle interactions, charge and energy transfer dynamics, as well as quantum jump and revival processes at the attosecond timescale and nanometer spatial resolution.
UltraSpecT opens new horizons in quantum-sensitive measurements, leveraging novel technological advancements in electron microscopes to explore the frontiers of quantum science. It aims to investigate decoherence dynamics beyond T2 using electron microscopes, enabling the exploration and manipulation of photon dynamics in individual single-photon emitters coupled to or embedded in quantum networks. UltraSpecT's ambitious goals span a highly interdisciplinary field, combining quantum optics with electron microscopy. My team and I will address the ambitious aspects of UltraSpecT by applying our extensive knowledge in both theoretical and experimental aspects of electron – light – matter interactions. I will further implement a risk mitigation plan that includes employing a variety of methods to realize our required radiation sources and beam shaping strategies.

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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

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(opens in new window) ERC-2024-COG

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Host institution

CHRISTIAN-ALBRECHTS-UNIVERSITAET ZU KIEL
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.

€ 2 000 000,00
Address
OLSHAUSENSTRASSE 40
24118 Kiel
Germany

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Region
Schleswig-Holstein Schleswig-Holstein Kiel, Kreisfreie Stadt
Activity type
Higher or Secondary Education Establishments
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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.

€ 2 000 000,00

Beneficiaries (1)

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