Publications, Projects and Patents

Selected publications, funded research projects and patents associated with the development of the Geonium Chip and our research in Penning traps, quantum microwave sensing and superconducting magnetic field engineering.

Selected publications

Circuit Model for HTS Flux Pump With Flux Conservation, Dynamic Resistance, and Flux Flow

J. H. Lacy and J. Verdú

IEEE Transactions on Applied Superconductivity 34, 5201405 (2024).

High frequency properties of a planar ion trap fabricated on a chip

A. J. Uribe, A. Cridland Mathad, J. H. Lacy, J. Pinder, R. Willetts and J. Verdú

Review of Scientific Instruments 93, 083202 (2022).

Flux Pumping of Multiple Double-Loop Superconducting Structures for a Planar Magnetic Field Source

J. H. Lacy, A. Cridland, J. Pinder, A. Uribe, R. Willetts and J. Verdú

IEEE Transactions on Applied Superconductivity 32, 4901511 (2022).

Quantisation of the elliptical Penning trap

F. Crimin, B. M. Garraway and J. L. Verdú

Journal of Physics B: Atomic, Molecular and Optical Physics 54, 115501 (2021).

Planar, strong magnetic field source for a chip ion trap

J. Pinder, J. H. Lacy, R. Willetts, A. Cridland Mathad, A. Uribe and J. Verdú

Review of Scientific Instruments 91, 103201 (2020).

Coherent coupling of a trapped electron to a distant superconducting microwave cavity

A. Cridland Mathad, J. H. Lacy, J. Pinder, A. Uribe, R. Willetts, R. Alvarez and J. Verdú

Applied Physics Letters 117, 154001 (2020).

Superconducting Flux Pump for a Planar Magnetic Field Source

J. H. Lacy, A. Cridland, J. Pinder, A. Uribe, R. Willetts and J. Verdú

IEEE Transactions on Applied Superconductivity 30, 4902412 (2020).

Single Microwave Photon Detection with a Trapped Electron

A. Cridland, J. H. Lacy, J. Pinder and J. Verdú

Photonics 3, 59 (2016).

A planar Penning trap with tunable dimensionality of the trapping potential

J. Pinder and J. Verdú

International Journal of Mass Spectrometry 356, 49–59 (2013).

Electronic Detection of a Single Particle in a Coplanar-waveguide Penning Trap

A. Al-Rjoub and J. Verdú

Applied Physics B 107, 955 (2012).

Theory of the Coplanar-waveguide Penning Trap

J. L. Verdú

New Journal of Physics 13, 113029 (2011).

A more complete publication record is available through ORCID .

Funded projects

Commercial viability of a microwave quantum sensor and of its components

UKRI Strength in Places Fund (SPF), University of Sussex.

2024–2025.

Trapped electron for neutrino mass measurement

UKRI Strength in Places Fund (SPF), University of Sussex.

2022–2025.

Quantum Geonium Mass Sensor: A route to market feasibility

EPSRC / UK quantum technology commercialisation programme, University of Sussex with industrial partners.

2017–2018.

Quantum Microwave Sensor

EPSRC, University of Sussex.

2015–2020.

The CPW-cavity planar Penning trap: Circuit-QED with trapped electrons and planar superconducting microwave cavities in a chip

EPSRC, University of Sussex.

2010–2013.

Patents

Quantum illumination using an ion trap

Inventors: José Luis Verdú Galiana, Frances Crimin and Irene Marzoli.

University of Sussex.

Patent family includes GB2606360, WO2022234274 and EP4334745.

Ion Trap

Inventor: José Luis Verdú Galiana.

University of Sussex.

Planar Penning-trap and magnetic-field technology. Patent family includes US 8,975,581 and EP2758983.

Ion Trap

Inventor: José Luis Verdú Galiana.

University of Sussex.

Coplanar-waveguide Penning-trap technology. US Patent 8,362,423.