1. Speaker: Itai Sfaradi
Title: Delayed Radio Flares from Tidal Disruption Events
Tidal Disruption Events (TDEs), the disruption of stars by the tidal forces of a Super-Massive Black Hole (SMBH), are offering a unique real-time opportunity to examine processes related to SMBHs and their interaction with their environments. So far, radio observations of TDEs revealed diverse properties, from the formation of relativistic jets to the interaction of an outflow material with the CNM, and even a possible association with neutrino emission. A recently discovered phenomenon in radio wavelengths is the emergence of late-time radio flares. It is still unclear whether the emission mechanism for such delayed radio flares is a delayed ejection of outflow material, a narrow jet that is misaligned with our line of sight, or something else entirely. I will review the recent discoveries in this field, present our unique sets of radio observations of several TDEs with delayed radio flares, and discuss our interpretation of some of these flares in the context of a new theoretical framework for relativistic jets observed off-axis.
2. Speaker: Ohad Lib
Title: Photonic quantum computation with high-dimensional cluster states
Photonic measurement-based quantum computation enables universal quantum computing via single qubit measurements on an entangled cluster state. However, generating large cluster states at high rates is notoriously difficult, as detection probabilities drop exponentially with the number of photons comprising the state. In this talk, I will describe our approach to generating cluster states by encoding multiple qubits per photon through high-dimensional spatial encoding. Our experiment involves controlling multiple spatial modes within the entangled state using multi-plane spatial light modulators, enabling the experimental generation of cluster states with more than 9 qubits at a rate of 100Hz. Additionally, I will demonstrate how passive and instantaneous feedforward between qubits encoded on the same photon can be achieved, facilitating a time-efficient realization of measurement-based quantum gates.
