Wormholes from cosmological reconstruction based on Gaussian processes

Abstract

We study the model-independent traversable wormholes from cosmological reconstruction based on Gaussian processes (GP). Using a combination of Union 2.1 SNe Ia data, the latest observational Hubble parameter data and recent Planck's shift parameter, we find that our GP method can give a tighter constraint on the normalized comoving distance, its derivatives and the dark energy equation of state than the previous work [1]. Subsequently, two specific traversable wormhole solutions are obtained, i.e., the cases of a constant redshift function and a linear shape function. We find that, with decreasing cosmic acceleration, the traversal velocity v of the former case increases and the amounts of exotic matter IV of the latter case decreases.

Stability of Effective Thin-shell Wormholes Under Lorentz Symmetry Breaking Supported by Dark Matter and Dark Energy

“…The best-fit values for this model according to the seventh-year Wilkinson microwave anisotropy probe (WMAP) and the sloan digital sky survey (SDSS)'s baryon oscillation spectroscopic survey (BAO) are as follows: B s = 0.822, α = 1.724 and B = −0.085 [36,78]. There are further constraints from the cosmic microwave background (CMB) shift parameters (BAO, type Ia supernova data (SN Ia)), observational Hubble data, and cluster X-ray gas mass fraction (CBF) as follows: B s = 0.7788 [47], and in their second work, they explored model-independent wormholes for the first time based on Gaussian Processes [48].…”

Stability of effective thin-shell wormholes under Lorentz symmetry breaking supported by dark matter and dark energy

“…There are further constraints from the cosmic microwave background (CMB) shift parameters (BAO, type Ia supernova data (SN Ia)), observational Hubble data, and cluster X-ray gas mass fraction (CBF) as follows: B s = 0.7788 −0.00915 (2σ). Wang and Meng studied wormholes in the context of modified gravities through observations [47], and in their second work, they explored model-independent wormholes for the first time based on Gaussian Processes [48]. In this paper, our aim is to construct an effective TSW with DE and DM in the background evolution by using BAO, SN Ia, and CMB data [62].…”