A natural heavy-hole flopping mode qubit in germanium

Phys. Rev. Research 3, 013194 (2021) Flopping mode qubits in double quantum dots (DQDs) allow for coherent spin-photon hybridization and fast qubit gates when coupled to either an alternating external or a quantized cavity electric field. To achieve this, however, electronic systems rely on syntheti...

Full description

Saved in:

Bibliographic Details
Main Authors:	Mutter, Philipp M, Burkard, Guido
Format:	Journal Article
Language:	English
Published:	18-12-2020
Subjects:	Physics - Mesoscale and Nanoscale Physics Physics - Quantum Physics
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	Phys. Rev. Research 3, 013194 (2021) Flopping mode qubits in double quantum dots (DQDs) allow for coherent spin-photon hybridization and fast qubit gates when coupled to either an alternating external or a quantized cavity electric field. To achieve this, however, electronic systems rely on synthetic spin-orbit interaction (SOI) by means of a magnetic field gradient as a coupling mechanism. Here we theoretically show that this challenging experimental setup can be avoided in heavy-hole (HH) systems in germanium (Ge) by utilizing the sizeable cubic Rashba SOI. We argue that the resulting natural flopping mode qubit possesses highly tunable spin coupling strengths that allow for one- and two-qubit gate times in the nanosecond range when the system is designed to function in an optimal operation mode which we quantify.
DOI:	10.48550/arxiv.2012.10214