Interference Purcell Filter for Fast, Modular, and Hardware-Efficient Quantum Measurement

This thesis proposes a method to suppress Purcell decay for fast, modular, and hardware-efficient quantum measurement that we call an “interference” Purcell filter. Superconducting qubits experience many decay channels, one of which is Purcell decay, or leakage of the qubit state into the readout line. The proposed work suppresses Purcell decay by coupling the readout resonator at two points on the readout line to create a destructive interference effect, enabling a small and space-efficient footprint. The Purcell suppression is compatible with large resonator decay rates, making it a suitable design as quantum error correction schemes move toward faster readout. Unlike many existing methods to suppress Purcell decay, the proposed design does not require an “open” or weakly-coupled port, the removal of which would improve modularity and expedite the design of many-qubit systems.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2022

Author dc:creator

• Yen, Alec

Advisor dc:contributor.advisor

• O’Brien, Kevin

Statement dc:rights

• In Copyright - Educational Use Permitted
• Copyright MIT

Licence dc:rights.uri

• http://rightsstatements.org/page/InC-EDU/1.0/

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/147518

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/147518