Nanoscale broadband transmission lines for spin qubit control

• Published in: Nanotechnology 2013-01, Vol.24 (1), p.015202-1-10
• Main Authors: Dehollain, J P, Pla, J J, Siew, E, Tan, K Y, Dzurak, A S, Morello, A
• Format: Article
• Language: English
• Subjects: Broadband; Classical and quantum physics: mechanics and fields; Condensed matter: structure, mechanical and thermal properties; Exact sciences and technology; General equipment and techniques; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Magnetic fields; Nanocomposites; Nanomaterials; Nanostructure; Nanotechnology; Physics; Quantum information; Qubits (quantum computing); Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing; Simulation; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties)
• ISSN: 0957-4484; 1361-6528
• DOI: 10.1088/0957-4484/24/1/015202

The intense interest in spin-based quantum information processing has caused an increasing overlap between the two traditionally distinct disciplines of magnetic resonance and nanotechnology. In this work we discuss rigorous design guidelines to integrate microwave circuits with charge-sensitive nanostructures, and describe how to simulate such structures accurately and efficiently. We present a new design for an on-chip, broadband, nanoscale microwave line that optimizes the magnetic field used to drive a spin-based quantum bit (or qubit) while minimizing the disturbance to a nearby charge sensor. This new structure was successfully employed in a single-spin qubit experiment, and shows that the simulations accurately predict the magnetic field values even at frequencies as high as 30 GHz.