Bulletin of the American Physical Society
APS March Meeting 2023
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session G74: Novel Spin Qubit Materials and Technologies I
11:30 AM–2:18 PM,
Tuesday, March 7, 2023
Room: Room 403/404
Sponsoring Unit: DQI
Chair: J. Carlos Egues, University of Basel
Abstract: G74.00001 : Quantum links for large-scale spin qubit architecturesAndre Saraiva*
11:30 AM–12:06 PM
This reduction in density is made possible through coherent quantum links connecting these modules of qubits within the same chip. Multiple technologies for high-fidelity remote coupling between spin qubits have been developed over the years. We will cover three technologies that we recently explored in the context of CMOS electrostatic quantum dots. We will discuss some ideas for spin-photon conversion schemes, besides simulations and early experimental results for multielectron coupler dots (jellybean dots).
A more detailed discussion will be devoted to a technology in which we have achieved most success: high-fidelity remote coupling using coherent transfer of spin qubits by tunnelling in a chain of quantum dots. Initial demonstrations exceeded 99% coherence transfer fidelity and 99.9% polarity transfer fidelity. With devices designed for optimal shuttling of electrons, even higher number might be achievable.
We will finalise mapping pros and cons of each quantum linking technology and how it might help shape the face of large-scale quantum error corrected processors.
*We acknowledge support from the Australian Research Council (FL190100167 and CE170100012), the US Army Research Office (W911NF17-1-0198), and the NSW Node of the Australian National Fabrication Facility. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Army Research Office or the US Government. The US Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein.
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