Events Daily

Monday, November 21, 2022

Status of the 3.5 keV X-ray line
Chris Dessert, New York University
Event Type: CCPP Brown Bag
Time: 12:30 PM - 1:30 PM
Location: 726 Broadway, 940, CCPP Seminar

Stochastic gravitational wave anisotropies: a new window into multi-field inflation
Arushi Bodas, University of Maryland
Event Type: Informal HEP Talk
Time: 2:00 PM - 3:00 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: Anisotropies of cosmological observables contain valuable information about the primordial fluctuations, famously illustrated by the CMB. One such observable could be a Stochastic Gravitational Wave Background (SGWB) from a first-order phase transition in the early universe, which will necessarily have anisotropies analogous to the CMB. In multi-field inflationary scenarios, SGWB anisotropies can have a significant isocurvature component, which can provide a complementary probe of inflationary physics beyond the standard adiabatic fluctuations of the CMB and LSS. I will explore the potential of such anisotropies as a probe of light fields from the inflationary era and show that the strength of GW signal can be significantly enhanced if there is a period of early matter domination. If time permits, I will show how SGWB can also probe associated heavier fields from inflation through the mechanism of Primordial Clocks.

Link to the Event Video

Grad Pheno Journal Club
Event Type: Grad Pheno Journal Club
Time: 3:30 PM - 4:30 PM
Location: 726 Broadway, 902, Lg Conf

Measurement-induced phase transition in teleportation and wormholes
Alexey Milekhin, University of California, Santa Barbara
Event Type: Informal HEP Talk
Time: 4:00 PM - 5:00 PM
Location: 726 Broadway, 940, CCPP Seminar
Abstract: We demonstrate that some quantum teleportation protocols exhibit measurement induced phase transitions in Sachdev Ye Kitaev model. Namely, Kitaev Yoshida and Gao Jafferis Wall protocols have a phase transition if we apply them at a large projection rate or at a large coupling rate respectively. It is well-known that at small rates they allow teleportation to happen only within a small time-window. We show that for large rates, the teleportation can be performed at any moment. In order to analyze Kitaev Yoshida case, we argue that certain projections can be approximated by low-energy quantum channels, which do not heat the system but qualitatively behave like a real projection. In dual Jackiw Teitelboim gravity these phase transitions correspond to the formation of an eternal traversable wormhole. In the Kitaev Yoshida case this novel type of wormhole is supported by continuous projections.

Link to the Event Video