Theoretical Physics

3

Authors: W. Chagas-Filho

We present the idea that a reasonable explanation for dark matter and dark energy can be obtained from the reparametrization symmetry of the action integral that describes a scalar relativistic particle.

4

Authors: Vyacheslav Dokuchaev, Yury Eroshenko

We consider the cosmological horizons in the expanding universe from the point of view of observer moving with respect to CMB frame. The deformation (non-sphericity) of cosmological horizons is demonstrated. Some principle consequences are discussed.

8

Authors: Chris Fields

Within the quantum Darwinist framework introduced by W. H. Zurek (Nat. Phys., 5:181-188, 2009), observers obtain effectively-classical pointer-state information about quantum systems by interacting with local samples of the surrounding environment, e.g. local samples of the ambient photon field. Quantum Darwinism requires the environment to encode such effectivelyclassical information uniformly and hence redundantly throughout its entire volume, making the information equally available to all possible observers regardless of their locations. This framework is applied to the observation of stellar center-of-mass positions, which are assumed to be encoded by the ambient photon field with sufficient redundancy to be uniformly accessible at all locations within our observable universe. Assuming Landauer’s Principle, constructing such an environmental encoding requires (ln2)kT per encoded classical bit. For the observed 1024 stars and a uniform binary encoding of center-of-mass positions into voxels with a linear dimension of 5 km, the free energy required at the current CMB temperature T = 2.7 K is ∼ 2.5 · 10−27 kg · m−3 , strikingly close to the observed value of ΩΛρc. Decreasing the voxel size to (lP ) 3 results in a free energy requirement 10117 times larger.