Probing emergent phenomena in complex environments

Quantum sensing using solid state defects

By manipulating the quantum state of defect spins in solids we can probe important questions about interactions on the single-molecule scale, reveal the underlying physics of new designer materials and explore hidden quantum mechanical phenomena at the nanometre scale.

From basic science to biomedical research

As part of our cross-disciplinary collaborations, we employ quantum sensors in nanocrystals that can be localized inside individual live cells or organisms by utilizing a bespoke biosensing platform (Q-BiC). We aim to translate this platform for use in biomedical research.

Latest publications

High fidelity qubit control in a natural Si-MOS quantum dot using a 300 mm silicon on insulator wafer

High fidelity qubit control in a natural Si-MOS quantum dot using a 300 mm silicon on insulator wafer

ARXIV, 2025

Xander Peetroons, Xunyao Luo, Tsung-Yeh Yang, Normann Mertig, Sofie Beyne, Julien Jussot, Yosuke Shimura, Clement Godfrin, Bart Raes, Ruoyu Li, Roger Loo, Sylvain Baudot, Stefan Kubicek, Shuchi Kaushik, Danny Wan, Takeru Utsugi, Takuma Kuno, Noriyuki Lee, Itaru Yanagi, Toshiyuki Mine, Satoshi Muraoka, Shinichi Saito, Digh Hisamoto, Ryuta Tsuchiya, Hiroyuki Mizuno, Kristiaan De Greve, Charles Smith,
Helena Knowles and Andrew Ramsay

Uncovering domain morphology in an unconventional magnet with scanning diamond quantum magnetometry

Uncovering domain morphology in an unconventional magnet with scanning diamond quantum magnetometry

ARXIV, 2025

Freya Johnson, Jan Zemen, Helena S. Knowles, Lesley F. Cohen

Robust Spin Polarization by Adiabatic Dynamical Decoupling

Robust Spin Polarization by Adiabatic Dynamical Decoupling

Physical Review Research, 2025

Soham Pal*, Oliver T. Whaites*, Wolfgang Knolle, Tania S. Monteiro, Helena S. Knowles

Q-BiC: A biocompatible integrated chip for in vitro and in vivo spin-based quantum sensing

Q-BiC: A biocompatible integrated chip for in vitro and in vivo spin-based quantum sensing

PRX Life, 2025

Louise Shanahan*, Sophia Belser*, Jack W. Hart*, Qiushi Gu, Julien R. E. Roth, Annika Mechnich, Michael Hoegen, Soham Pal, Toby Mitchell, David Jordan, Eric A. Miska, Mete Atatüre, Helena S. Knowles

Opportunities for diamond quantum metrology in biological systems

Opportunities for diamond quantum metrology in biological systems

Appl. Phys. Lett., 2023

Sophia Belser*, Jack W. Hart*, Qiushi Gu, Louise Shanahan and Helena S. Knowles

Multimodal quantum metrology in living systems using nitrogen-vacancy centres in diamond nanocrystals

Multimodal quantum metrology in living systems using nitrogen-vacancy centres in diamond nanocrystals

Frontiers in Quantum Science and Technology 2, 2023

Jack W. Hart* and Helena S. Knowles*

Simultaneous nanorheometry and nanothermometry using intracellular diamond quantum sensors

Simultaneous nanorheometry and nanothermometry using intracellular diamond quantum sensors

ACS Nano., 2023

Qiushi Gu*, Louise Shanahan*, Jack W. Hart*, Sophia Belser, Noah Shofer, Mete Atatüre and Helena S. Knowles

News

Keep up to date with all the news from the lab

Congratulations, Dr. Mitchell!

Toby Mitchell successfully defended his thesis to become the second PhD awarded from the Coherent Quantum group. Toby was the first student in the solid state subgroup, with his work focusing on both utilizing magnetic Read more…

Congratulations, Dr. Belser!

The Coherent Quantum group celebrates its first PhD student passing their viva! Dr. Sophia Belser started her PhD in 2020, researching nanodiamond surface functionalization and in vivo quantum sensing applications. Whilst Sophia will be missed Read more…

Dr. Helena Knowles

Associate Professor, Group Leader

Royal Society University Research Fellow
PhD at the University of Cambridge, 2015

Dr. Soham Pal

Research associate

PhD at the Indian Institute of Science Education and Research (IISER), 2021

Dr. Jack Hart

Research Associate

PhD at the University of Manchester, 2019

Dr. Freya Johnson

1851 Research Fellow

PhD at Imperial College London, 2022

Julien Roth

PhD Student

David O'Shea

PhD Student

Chenxi Feng

PHD STUDENT

Katie Ninham

PHD Student

Abbie Aleksandrova

PHD STUDENT

Xander Peetroons

PHD STUDENT

Ibrahim Kanber

PhD student

Omri Porat

PhD Student