18 September 2019
Marco Ornigotti (Tampere University)
Accelarating Optical Beams - Basics and Perspectives
Since the introduction of Airy beams in optics in 2007 by Siviloglou and co-workers, accelerating electromagnetic fields have attracted a lot of interest, mainly due to their intriguing properties, such as their diffraction free propagation, and the ability to propagate along curved trajectories, without them being subject to any external force.
During this decade, different forms of accelerating beams, ranging from traditional Airy beams, to radially self-accelerating beams, and beam propagating along arbitrarily engineered trajectories, and their potential use in different fields of physics has been thorough fully investigated.
In this talk, after a brief review on accelerating beams, and their physical properties, I will concentrate on the latest addition to this family of beams, namely radially self-accelerating beams, i.e., electromagnetic fields propagating along spiralling trajectories. In particular, I will discuss their physical structure, and envision some interesting applications.
2 October 2019
Paul Soler (GU)
Heavy-quark spectroscopy at LHCb
LHCb is the dedicated heavy-quark flavour experiment at the Large Hadron Collider (LHC) at CERN. The experiment has been designed to select beauty and charm hadrons with the main purpose of studying matter-antimatter asymmetries to elucidate CP violation in the beauty and charm-quark sectors. As a consequence, LHCb has the largest available data-set to measure the spectroscopy of heavy hadrons in order to test predictions of Quantum Chromodynamics (QCD). In this talk, I will highlight some recent results from LHCb in heavy-quark spectroscopy, including discovery of new beauty baryon states, the first observation of doubly-charm baryons and exploration of exotic states, such as tetraquark and pentaquark states observed at LHCb.
16 October 2019
Leo Carlin (Beatson Advanced Imaging Resource)
Imaging the immune response to cancerHeavy-quark spectroscopy at LHCb
Cells of the immune system have been implicated in almost every stage of cancer development from the earliest events of mutagenesis through to invasion of healthy tissue and spread throughout the body in metastasis. However, even though the immune system is our evolved defence against infection and pathogenesis, it is not always protective in cancer, and anti-cancer immunity can be opposed by pro-tumour immune behaviour. As immune cells can be defined by the expression of multiple specific cell surface molecules, they are often investigated by flow cytometry of dissociated tissue due to the multiplexing possible with this technique, however, temporal and spatial information is lost. We use innovative light microscopical approaches to image immune cells in live and fixed tissue from tumour models to gain a spatiotemporal appreciation of immune cell dynamics in cancer. We are using this information to better understand how tumour cells interact with the immune system, how therapies influence these interactions, and how they might be better timed, combined or targeted in the future.
23 October 2019
Steen Grüner Hanson (DTU Denmark)
Light with finite rotation: an attempt for a theoretical description
An introduction will be given to the use of complex-valued ABCD-matrices (Canonical Transforms) in dealing with stochastical problems within optics. Applications within the treatment of speckles and light penetration through turbulent media is highlighted, as will the analysis of propagation in optical cavities. The lecture will address basic features within treating stochastical problems in general, although here primarily addressing issues within optics. Finally, an attempt for a matrix formalism for Metatoys (J. Courtial et al) is proposed, together with a novel element within the “Metatoy family”.