Zobrazeno 1 - 10
of 4 148
pro vyhledávání: '"A. Marto"'
Autor:
Kumar, K. Sravan, Marto, João
Hawking's seminal work on black hole radiation highlights a critical issue in our understanding of quantum field theory in curved spacetime (QFTCS), specifically the problem of unitarity loss (where pure states evolve into mixed states). In this pape
Externí odkaz:
http://arxiv.org/abs/2407.18652
Autor:
Kumar, K. Sravan, Marto, João
Publikováno v:
Universe 2024, 10(8), 320
Quantum field theory (QFT) in Rindler spacetime is a gateway to understanding unitarity and information loss paradoxes in curved spacetime. Rindler coordinates map Minkowski spacetime onto regions with horizons, effectively dividing accelerated obser
Externí odkaz:
http://arxiv.org/abs/2405.20995
Autor:
Marto, Simão da Graça, Vasile, Massimiliano, Campbell, Andrew, Murray, Paul, Marshall, Stephen, Savitski, Vasili
Spectral lightcurves consisting of time series single-pixel spectral measurements of spacecraft are used to infer the spacecraft's attitude and rotation. Two methods are used. One based on numerical optimisation of a regularised least squares cost fu
Externí odkaz:
http://arxiv.org/abs/2401.05397
In recent years, the formation of primordial black holes (PBH) in the early universe inflationary cosmology has garnered significant attention. One plausible scenario for primordial black hole (PBH) formation arises during the preheating stage follow
Externí odkaz:
http://arxiv.org/abs/2311.02754
Autor:
Rasouli, S. M. M., Marto, João
Publikováno v:
Chaos, Solitons and Fractals 187 (2024) 115349
Considering an arbitrary dimensional FLRW universe in the framework of a generalized S\'{a}ez--Ballester (SB) theory, we establish a noncommutative (NC) cosmological model. We concentrate on the predictions of NC model and compare them with their com
Externí odkaz:
http://arxiv.org/abs/2311.01627
Autor:
Vasile, Massimiliano, Walker, Lewis, Campbell, Andrew, Marto, Simao, Murray, Paul, Marshall, Stephen, Savitski, Vasili
This paper presents a data processing pipeline designed to extract information from the hyperspectral signature of unknown space objects. The methodology proposed in this paper determines the material composition of space objects from single pixel im
Externí odkaz:
http://arxiv.org/abs/2308.07481
Autor:
Kumar, K. Sravan, Marto, João
We argue that the origin of unitarity violation and information loss paradox in our understanding of black holes (BH) lies in the standard way of doing quantum field theory in curved space-time (QFTCS), which is heavily biased on intuition borrowed f
Externí odkaz:
http://arxiv.org/abs/2307.10345
Autor:
Kumar, K. Sravan, Marto, João
The presence of CMB Hemispherical Asymmetry (HPA) challenges the current understanding of inflationary cosmology which does not generically predict the parity violation in the primordial correlations. In this paper, we shall review the recently propo
Externí odkaz:
http://arxiv.org/abs/2305.06057
Autor:
Kumar, K. Sravan, Marto, João
Before we ask what the quantum gravity theory is, it is a legitimate quest to formulate a robust quantum field theory in curved spacetime (QFTCS). Several conceptual problems, especially unitarity loss (pure states evolving into mixed states), have r
Externí odkaz:
http://arxiv.org/abs/2305.06046
Autor:
Kumar, K. Sravan, Marto, João
Although the cosmic microwave background (CMB) is largely understood to be homogeneous and isotropic, the CMB power presents anomalies that seem to break down parity symmetry at large angular scales. We argue that the primordial scalar and tensor pow
Externí odkaz:
http://arxiv.org/abs/2209.03928