Speaker: Associate Professor Jacqui Romero
Affiliation: University of Queensland

Abstract

The transverse shape of light has emerged in recent years as a promising platform for encoding quantum information, for the multiple levels that it affords and the ease with which shape can be controlled. To demonstrate, I will discuss two recent experiments.  The first is on ignorance: One might ask if ignorance of a whole system implies ignorance of its parts.  Our classical intuition tells us yes, however quantum theory tells us no: it is possible to encode information in a quantum system so that despite some ignorance of the whole, it is impossible to identify the unknown part. I will give an experimental evidence that supports this counterintuitive fact.  The second is on learning: We used a tomographic technique inspired by machine learning to track a quantum state as the state changes. The method is computationally efficient and also robust—it converges to a good estimate even in the presence of strong noise.   Developing techniques like this is especially important for systems that are of high dimensionality, where making tomographically complete measurements become impractical.

About Physics Seminars

The weekly Physics Seminar series focuses on a broad range of physics research within SMP, along with frequent presentations from visiting researchers. Seminars are usually scheduled for 1.00pm on Tuesdays.

The talks are typically more specialised than a colloquium but are often attended by staff and PhD students across a broad range of areas. Speakers are thus encouraged to include introductory material in the talks.

All SMP researchers and HDR students are encouraged to speak. Please email Glen Harris to register your interest.

The seminars are open so there is no need to register your attendance.

Previous recorded physics seminars 

Venue

Physics Annexe (06)
Room: 
407 (and via zoom https://uqz.zoom.us/j/94116861984)