126 citations · 409 across the 7 of their papers we have counts for
5 papers · 1 filter
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…
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…