126 citations · 409 across the 7 of their papers we have counts for
7 papers
Emergence of classical behavior in the early universe
Abhay Ashtekar, Alejandro Corichi, Aruna Kesavan
We investigate three issues that have been discussed in the context of inflation: Fading of the importance of quantum non-commutativity; the phenomenon of quantum squeezing; and th…
Asymptotics with a positive cosmological constant: III. The quadrupole formula
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
Almost a century ago, Einstein used a weak field approximation around Minkowski space-time to calculate the energy carried away by gravitational waves emitted by a time changing ma…
Gravitational waves from isolated systems: Surprising consequences of a positive cosmological constant
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
There is a deep tension between the well-developed theory of gravitational waves from isolated systems and the presence of a positive cosmological constant , however tiny. In pa…
Asymptotics with a positive cosmological constant: II. Linear fields on de Sitter space-time
Abhay Ashtekar, Béatrice Bonga, Aruna Kesavan
Linearized gravitational waves in de Sitter space-time are analyzed in detail to obtain guidance for constructing the theory of gravitational radiation in presence of a positive co…
Non-local bispectra from super cosmic variance
Bekir Baytaş, Aruna Kesavan, Elliot Nelson +2
We present examples of non-Gaussian statistics that can induce bispectra matching local and non-local (including equilateral) templates in biased sub-volumes. We find cases where t…
Asymptotics with a positive cosmological constant: I. Basic framework
Abhay Ashtekar, Beatrice Bonga, Aruna Kesavan
The asymptotic structure of the gravitational field of isolated systems has been analyzed in great detail in the case when the cosmological constant is zero. The resulting fram…
Dark Energy
Aruna Kesavan
Dark energy is one of the mysteries of modern science. It is unlike any known form of matter or energy and has been detected so far only by its gravitational effect of repulsion. O…