Online Seminar: Dr Gerardo Paz Silva, Griffith U, Australia

Controls and frames: A new approach to quantum noise spectroscopy

blue and purple ripples colliding

Image: Gerd Altmann / Pixabay

Noise Cancellation and your quantum computer

SPEAKER: Dr Gerardo Paz Silva

AFFILIATION: Centre for Quantum Dynamics, Griffith University, Brisbane, Qld, Australia

HOSTED BY:  A/Prof Chris Ferrie, UTS Centre for Quantum Software and Information

ABSTRACT:
Noise cancellation, as in everyday headphones, requires the ability to characterize & filter out the noise affecting a system one wants to protect. The last few years have seen the birth of increasingly more powerful Quantum Noise Spectroscopy (QNS) protocols, capable of characterizing the noise affecting a quantum system of interest. However, while many of these protocols have been experimentally verified, all demonstrations have been so far limited to characterizing injected noise. More importantly, even theoretically a fully general protocol is still non-existent. In this talk I will introduce our new approach to the problem, which overcomes these limitations.
I will argue that by characterizing only the portions of the noise that are relevant a given set of control capabilities, e.g., available to a particular experiment, many of the existing difficulties in designing a fully general QNS protocol disappear. I describe the key ingredients allowing this and exemplify our results via two paradigmatic examples.  

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Acknowledgement of Country

UTS acknowledges the Gadigal people of the Eora Nation, the Boorooberongal people of the Dharug Nation, the Bidiagal people and the Gamaygal people, upon whose ancestral lands our university stands. We would also like to pay respect to the Elders both past and present, acknowledging them as the traditional custodians of knowledge for these lands.