A prestigious ERC Advanced Grant has been awarded to Adrian Bachtold from the BIST Community centre ICFO for the pioneering research project QTube. In this latest call, the European Research Council (ERC) is funding 281 leading researchers across Europe with a total of €721 million.
Prof. Adrian Bachtold, leader of the Quantum Nanomechanics and Nanoelectronics research group at the BIST Community centre ICFO
This year, the ERC has awarded a prestigious Advanced Grant to Prof. at ICFO Adrian Bachtold, group leader of the Quantum Nanomechanics and Nanoelectronics research group. The grant will support his group’s groundbreaking scientific research in exploring the limits of quantum mechanics through the quantum delocalization of carbon nanotubes.
The five-year project, titled QTube, will aim to extend quantum superposition states beyond the microscopic world by quantum delocalizing a nanotube mechanical resonator, an object composed of approximately one million atoms, to a length scale greater than its diameter.
QTube will tackle several key challenges with significant scientific impact. Firstly, it will develop a nanotube double quantum dot qubit with record-breaking coherence rate; secondly, it will aim to detect the mechanical vibrations of the nanotube in the quantum ground state using a quantum nondemolition approach with a superconducting resonator. Thirdly, it will demonstrate a double-well potential for nanomechanical vibrations, to synthesize a macroscopic quantum superposition of a nanotube
The research tackles major scientific and technological challenges, including the development of a high-coherence nanotube double quantum dot qubit, engineering a double-well potential for nanomechanical vibrations, and ultimately verifying the superposition state using quantum tomography.
“This grant is absolutely crucial for progressing toward such an ambitious goal,” comments Bachtold. “It gives us stable, long-term funding and allows our team to fully focus on solving extremely complex and fundamental scientific problems.”
The new project marks a new scientific direction compared to the group’s previous work. Recent advances in engineering double-well potentials in nanotube resonators have laid the groundwork for this leap, inspiring the proposal behind the newly funded research. “The objective is to achieve quantum delocalization that exceeds the size of the nanotube using the double-well potential approach,” explains the lead researcher. “If successful, this work could open the door to realizing quantum superposition states in even more massive and complex systems.”
With previous ERC grants—both a Starting Grant and an earlier Advanced Grant—the team has built up a solid foundation in nanomechanics and quantum electronics. “This new grant builds directly on our prior work but takes us in a significantly more daring and unexplored direction,” the researcher adds. “It’s exactly the kind of leap that ERC support makes possible.”
Finally, Prof. Oriol Romero-Isart, Director of ICFO, highlights the importance of the ERC programme for the pursuit of research excellence at ICFO, emphasizing that “At ICFO, our mission is twofold: to push the frontiers of both applied and fundamental research. We’re thrilled that Prof. Bachtold and his team have received strong ERC support to pursue the ambitious goal of preparing a carbon nanotube in a macroscopic quantum state. We look forward to the groundbreaking results ahead!”
