# Cosmic information, the cosmological constant and the amplitude of primordial perturbations

@article{Padmanabhan2017CosmicIT, title={Cosmic information, the cosmological constant and the amplitude of primordial perturbations}, author={Thanu Padmanabhan and Hamsa Padmanabhan}, journal={Physics Letters B}, year={2017}, volume={773}, pages={81-85} }

## 25 Citations

### The atoms of spacetime and the cosmological constant

- Physics
- 2017

I describe an approach which relates classical gravity to the quantum microstructure of spacetime. In this approach, the field equations arise from maximizing the density of states of the matter plus…

### Cosmological constant caused by observer-induced boundary condition

- PhysicsJournal of Physics Communications
- 2020

The evolution of the wave function in quantum mechanics is deterministic like that of classical waves. Only when we bring in observers the fundamentally different quantum reality emerges. Similarly…

### Configuration entropy of the cosmic web: can voids mimic the dark energy?

- PhysicsMonthly Notices of the Royal Astronomical Society: Letters
- 2019

We propose an alternative physical mechanism to explain the observed accelerated expansion of the Universe based on the configuration entropy of the cosmic web and its evolution. We show that the…

### Eddington gravity with matter: An emergent perspective

- Physics
- 2020

We describe an action principle, within the framework of the Eddington gravity, which incorporates the matter fields in a simple manner. Interestingly, the gravitational field equations derived from…

### Gravity and quantum theory: Domains of conflict and contact

- PhysicsInternational Journal of Modern Physics D
- 2019

There are two strong clues about the quantum structure of spacetime and the gravitational dynamics, which are almost universally ignored in the conventional approaches to quantize gravity. The first…

### Background independent field quantization with sequences of gravity-coupled approximants

- PhysicsPhysical Review D
- 2020

We outline, test, and apply a new scheme for nonpertubative analyses of quantized field systems in contact with dynamical gravity. While gravity is treated classically in the present paper, the…

### Microscopic origin of Einstein's field equations and the raison d'être for a positive cosmological constant

- PhysicsPhysics Letters B
- 2021

### A study of holographic dark energy models using configuration entropy.

- Physics
- 2020

The holographic dark energy models provide an alternative description of the dark energy. These models are motivated by the possible application of holographic principle to the dark energy problem.…

### Configuration entropy in the ΛCDM and the dynamical dark energy models: Can we distinguish one from the other?

- Physics, Computer ScienceMonthly Notices of the Royal Astronomical Society
- 2018

This work considers the $\Lambda$CDM model and a set of dynamical dark energy models with different parametrization of the equation of state and explores the evolution of the configuration entropy in these models.

### Does information entropy play a role in the expansion and acceleration of the Universe

- Physics
- 2017

We propose an interpretation of the expansion and acceleration of the Universe from an information theoretic viewpoint. We obtain the time evolution of the configuration entropy of the mass…

## References

SHOWING 1-10 OF 28 REFERENCES

### Cosmological Constant from the Emergent Gravity Perspective

- Physics
- 2014

Observations indicate that our universe is characterized by a late-time accelerating phase, possibly driven by a cosmological constant $\Lambda$, with the dimensionless parameter $\Lambda L_P^2…

### The Atoms Of Space, Gravity and the Cosmological Constant

- Physics
- 2016

I describe an approach which connects classical gravity with the quantum microstructure of spacetime. The field equations arise from maximizing the density of states of matter plus geometry. The…

### CosMIn: THE SOLUTION TO THE COSMOLOGICAL CONSTANT PROBLEM

- Physics
- 2013

The current acceleration of the universe can be modeled in terms of a cosmological constant Λ. We show that the extremely small value of , the holy grail of theoretical physics, can be understood in…

### Fluctuations at the threshold of classical cosmology

- Physics
- 1970

It is proposed that the initial conditions of galaxy formation are metric fluctuations at the threshold epoch of classical cosmology, and the evidence in favor of this theory is (i) the density fluctuation obeys the n=23 rule, and (ii) the spin fluctuation gives an eventual angular momentum of the order N43ℏ, in reasonable agrement with that of the Galaxy.

### Making inflation work: Damping of density perturbations due to Planck energy cutoff.

- PhysicsPhysical review. D, Particles and fields
- 1989

This paper compute the power spectrum of density perturbations directly from vacuum fluctuations of the ''time-time'' component of the energy-momentum tensor, and compute the inhomogeneous part of the correlation function for a massless minimally coupled scalar field in de Sitter space.

### Cosmology without inflation

- Physics
- 2008

We propose a new cosmological paradigm in which our observed expanding phase is originated from an initially large contracting Universe that subsequently experienced a bounce. This category of…

### Initial state of matter fields and trans-Planckian physics: Can CMB observations disentangle the two?

- Physics
- 2005

The standard, scale-invariant, inflationary perturbation spectrum will be modified if the effects of trans-Planckian physics are incorporated into the dynamics of the matter field in a…

### Holography and the scale invariance of density fluctuations

- Physics
- 2007

We study a scenario for the very early universe in which there is a fast phase transition from a non-geometric, high temperature phase to a low temperature, geometric phase described by a classical…

### Spectral dimension of a quantum universe

- Physics
- 2010

In this paper, we calculate in a transparent way the spectral dimension of a quantum spacetime, considering a diffusion process propagating on a fluctuating manifold. To describe the erratic path of…