1. The Narrabri Stellar Intensity Interferometer: Lessons for Tomorrow

Historical talk on NSII and its enduring legacy. Overview of our present crossroads in astronomical imaging with emphasis on the astronomical discovery space of tomorrow. Also a few strategic talks about transformative technologies that will be of critical importance for new generation instruments. This session is basically to set the stage: where do we want to go tomorrow?

2. Coherent Optical Astronomical Imaging

Succinct overview of contemporary state of the art in stellar interferometry (covering overlap with closely related areas in Coronography & Adaptive Optics). Emphasis is on basic underlying principles and ultimate performance limits rather than an exhaustive list of contemporary instruments. What do interferometers teach us about how to build an ELT? 

3. Astrophotonics

Fundamental principles of photonics and how it has been applied successfully to a variety of otherwise-intractable problems in contemporary observational astronomy. Next generation developments from photonics which will empower further advances for tomorrow's astrophysical research. This session will focus on how astrophotonic technologies can empower new generation astronomical imaging.

4. Quantum Astronomy and Alternate Architectures for Stellar Imaging

Quantum Astronomy has been a major emergent theme, resurgent in the last couple of years although the statistical optics treatment of starlight by Hanbury Brown and Twiss has opened a treasure chest of possibilities. Recent excitement has focused on the extension of polarimetry and polarimetric interferometry to higher states describing orbital angular momentum of the photons. Although amplitude interferometry has dominated the optical/IR region for decades, alternate architectures involving heterodyne, frequency conversion, or quantum effects entailing photon teleportation may hold promise for the future. 

5. Advanced Modes and Space

Advanced operational modes which deliver exquisite measurement precision are an operational requirement in delivering the most important astrophysical data, such as direct imaging of faint exoplanets in orbit around their host star. Key innovations will require Nulling Interferometers probably also employing Differential detection (Phase and Closure Phase). The JWST has a  dedicated interferometer on the NIRISS instrument, while the cost and performance envelope of cubesat technologies continues to drive them into ever more accessible realms. 

6.  New Projects and The Planet Formation Imager

This session is an open format workshop discussion. Can we synthesize what we have learned into coherent systems for future astronomical discovery that will be of broad relevance to the field? Projects such as MROI are just around the corner, while the conceptual design and primary operating mode of the new international "Planet Formation Imager" instrument remains highly fluid. Are there other ambitious Space or Antarctic concepts in stellar imaging?