FRB 20210601A: Extreme Temporal Clustering in a Repeating Fast Radio Burst Source as Evidence for a Hidden Class of Episodic Repeaters

Posted by klaurent MIT, This Week: Astrophysics

Kavli Affiliate: Kiyoshi Masui | Summary:Population studies of fast radio burst (FRB) repetition typically model sources using a single distribution of steady, time-averaged burst rates, yet individual sources show significant departures from this assumption. Here we present FRB 20210601A, a source discovered by the Canadian Hydrogen Intensity Mapping Experiment FRB project (CHIME/FRB) that represents the […]


Continue.. FRB 20210601A: Extreme Temporal Clustering in a Repeating Fast Radio Burst Source as Evidence for a Hidden Class of Episodic Repeaters

Surface Defects in the $mathcalN=2$ Lens Space Index and Elliptic Integrability

Posted by klaurent This Week: Astrophysics, Tokyo

Kavli Affiliate: Masahito Yamazaki | Summary:We determine the surface-defect difference operators of the 4d $mathcalN=2$ lens space index for class $mathcalS$ theories of type $A_N-1$ on $(mathbbS^3/mathbbZ_r)timesmathbbS^1$. For generic fugacities $(p,q,t)$ and arbitrary rank $N$, orbifold order $r$ and discrete holonomies, their coefficients are finite products of theta functions with nomes $p^r$ and $q^r$. After […]


Continue.. Surface Defects in the $mathcalN=2$ Lens Space Index and Elliptic Integrability

Reconfigurable Free-Space Optical Interconnects

Posted by klaurent Chicago, This Week: Astrophysics

Kavli Affiliate: David W. Miller | Summary:Free-space optical interconnects can support many low-data-rate channels while avoiding the cost, energy consumption, and packaging constraints of optical waveguide- or fiber-based systems that are widely used today. We propose a free-space optical interconnect system based on reconfigurable micromirror arrays, and show that it scales favorably due to its […]


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