COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring. |

University of Cambridge > Talks.cam > Cosmology Lunch > Cosmological Constant, its Problem(s) and the Solution

## Cosmological Constant, its Problem(s) and the SolutionAdd to your list(s) Download to your calendar using vCal - T. Padmanabhan
- Monday 17 June 2013, 13:00-14:00
- CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].
If you have a question about this talk, please contact mustafa.a.amin. Observations indicate that our universe can be characterised by three distinct phases of evolution: An early inflationary phase possibly driven by a scalar field, a late-time accelerated phase dominated by dark energy and a transient phase in between, dominated by radiation and matter. The late-time acceleration can be consistently modeled in terms of a cosmological constant (Λ) provided its value is extremely tiny: ΛL_P2 ≈ 10-122 where L_P = sqrt(Għ/c3) is the Planck length. A key issue in theoretical physics is to explain the extremely small value of this dimensionless parameter. I will describe how this value can be understood in terms of a new dimensionless parameter (CosMIn) which counts the number of modes inside a Hubble volume that cross the Hubble radius during a specified interval of time. CosMIn has the same (‘conserved’) value during well-defined intervals in the three phases of cosmic evolution, and this fact helps us to determine the numerical value of the cosmological constant. This approach provides a truly unified picture of cosmic evolution relating the early inflationary phase, the late accelerating phase and certain considerations of Planck scale physics. I will also discuss how these ideas are related to a description of cosmic expansion as a quest for holographic equipartition and lead to a novel paradigm to study cosmology. This talk is part of the Cosmology Lunch series. ## This talk is included in these lists:- All CMS events
- CMS Events
- CMS, Pav. B, CTC Common Room (B1.19) [Potter Room]
- Cosmology Lunch
- Cosmology lists
- Cosmology, Astrophysics and General Relativity
- DAMTP info aggregator
- Kavli Institute for Cosmology Talk Lists
- Priscilla
- bld31
Note that ex-directory lists are not shown. |
## Other listsOccasional Nuclear Energy Seminars . The Homi Bhabha Lecture## Other talksReconstructing deep ocean circulation pathway and strength using sediment dispersion HONORARY FELLOWS PRIZE LECTURE - Towards a silent aircraft Quantum geometry from the quantisation of gravitational boundary modes on a null surface The cardinal points and the structure of geographical knowledge in the early twelfth century Holonomic D-modules, b-functions, and coadmissibility |