7 papers
Cosmological Evidence for Dark Axion-Dark Baryon Interactions from Apparent Phantom Crossing
Justin Khoury, Meng-Xiang Lin, Mark Trodden
Interactions between dark matter and dark energy can lead to an apparent phantom-crossing behavior that mimics the expansion history preferred by the latest cosmological observatio…
Superfluid Dark Matter
Lasha Berezhiani, Giordano Cintia, Valerio De Luca +1
The superfluid dark matter model offers an elegant solution to reconcile discrepancies between the predictions of the cold dark matter paradigm and observations on galactic scales.…
Hidden symmetries for tidal Love numbers: Generalities and applications to analog black holes
Valerio De Luca, Brandon Khek, Justin Khoury +1
Tidal Love numbers characterize the conservative, static response of compact objects to external tidal fields. Remarkably, these quantities vanish identically for asymptotically fl…
Apparent and a Lower from Dark Axion and Dark Baryons Interactions
Justin Khoury, Meng-Xiang Lin, Mark Trodden
We show that a simple coupling between dark energy and dark matter can simultaneously address two distinct hints at new physics coming from cosmological observations. The first is…
Gravitational memory and soft theorems: The local perspective
Valerio De Luca, Justin Khoury, Sam S. C. Wong
In general relativity, gravitational memory describes the lasting change in the separation and relative velocity of freely falling detectors after the passage of gravitational wave…
Gravitational memory and Ward identities in the local detector frame
Valerio De Luca, Justin Khoury, Sam S. C. Wong
Gravitational memory, which describes the permanent shift in the strain after the passage of gravitational waves, is directly related to Weinberg's soft graviton theorems and the B…