Superinduktans för långlivad kvantkoherens
Forskningsprojekt , 2013 – 2014

I will develop a “superinductor” – a very-high kinetic inductance superconducting nanowire of thin-film niobium nitride. Its reactive impedance will exceed the quantum resistance (6.5 kΩ) at microwave frequencies, while being nearly lossless at dc. I shall first make this new component, and then design a new type of superconducting qubit (quantum bit of information) – the “metastable flux qubit” – consisting of a nanoscale Josephson junction (JJ) shunted by a superinductance.

This qubit has a very small transition dipole matrix element between its metastable quantum ground states, and therefore extremely small coupling to any noise sources. This enables a projected energy-relaxation coherence time approaching one second – more than three orders of magnitude better than any existing device. Since decoherence is the worst problem impeding the advancement of quantum-information processing (QIP) technology, the successful realization of this long-lived qubit would represent a breakthrough in superconducting quantum engineering.

Deltagare

Jonas Bylander (kontakt)

Docent vid Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Finansiering

Chalmers

Finansierar Chalmers deltagande under 2013–2014

Relaterade styrkeområden och infrastruktur

Nanovetenskap och nanoteknik (2010-2017)

Styrkeområden

Nanotekniklaboratoriet

Infrastruktur

Publikationer

2018

Nanowire Superinductors

Licentiatavhandling

Mer information

Senast uppdaterat

2016-07-27