Abstract: The acceleration of the Universe is one of the key open problems in cosmology. Dynamical dark energy, at variance with the cosmological constant, behaves like a medium which spontaneously breaks Lorentz invariance. Gravitational waves propagating in this medium may have a speed different from the speed of light and can decay into fluctuations of the medium. These effects are constrained by the recent experimental observations of gravitational waves and this sets severe bounds on dark energy models.

 

Here is zoom link for Physics Special Colloquium :

 

IISER-PHY PUNE is inviting you to a scheduled Zoom meeting.

Topic: Special Physics Colloquium - Paolo Creminelli, ICTP Trieste
Time: Sep 7, 2020 04:00 PM India

Join Zoom Meeting
https://zoom.us/j/91536184140?pwd=RkdCQ0Ixd29nSnlId25VRjdyTWYrdz09

Meeting ID: 915 3618 4140
Passcode: 402868