A Josephson phase battery – A quantum battery for superconducting circuits
Speaker: Andrea Iorio, PhD student
Affiliation: Scuola Normale Superiore, Italy
Abstract
In this talk I will discuss some recent advances in the field of superconducting devices in which superconductivity, spin-orbit coupling and magnetism coexist. I will focus on the experimental realization of a phase battery, a device capable of providing a persistent phase bias to the wave function of a superconducting quantum circuit. The phase battery is realized by an hybrid Josephson junction made of an InAs nanowire proximitized by aluminum superconducting leads. We found that the ferromagnetic polarization of unpaired spin states on the nanowire surface can be efficiently converted into a persistent phase bias across the wire, leading to the anomalous Josephson effect. Our findings demonstrate how the combined action of spin–orbit coupling, magnetic field and superconducting phase can lead to non-reciprocal quantum phenomena and can be exploited for developing new superconducting electronic devices.
About Physics Seminars
The weekly Physics Seminar series focuses on a broad range of physics research within SMP, along with frequent presentations from visiting researchers. Seminars are usually scheduled for 1.00pm on Tuesdays.
The talks are typically more specialised than a colloquium but are often attended by staff and PhD students across a broad range of areas. Speakers are thus encouraged to include introductory material in the talks.
All SMP researchers and HDR students are encouraged to speak. Please email Lewis Williamson to register your interest.
The seminars are open so there is no need to register your attendance.