Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Yazdi, Yasaman K."'
We study the statistical fluctuations (such as the variance) of causal set quantities, with particular focus on the causal set action. To facilitate calculating such fluctuations, we develop tools to account for correlations between causal intervals
Externí odkaz:
http://arxiv.org/abs/2407.03395
Autor:
Yazdi, Yasaman K.
Publikováno v:
Modern Physics Letters A (2023) 2330003
We briefly survey open questions in cosmology that either have been or could potentially be addressed with the help of the causal set theory approach to quantum gravity. Our discussion includes topics ranging from dark matter and dark energy to primo
Externí odkaz:
http://arxiv.org/abs/2311.14881
This paper investigates Everpresent $\Lambda$, a stochastic dark energy model motivated by causal set theory and unimodular gravity, and confronts it with two key observational data sets, Supernova Ia (SN Ia) and Cosmic Microwave Background (CMB) dat
Externí odkaz:
http://arxiv.org/abs/2307.13743
Publikováno v:
JCAP10(2023)047
We provide a comprehensive discussion of the Everpresent $\Lambda$ cosmological model arising from fundamental principles in causal set theory and unimodular gravity. In this framework the value of the cosmological constant ($\Lambda$) fluctuates, in
Externí odkaz:
http://arxiv.org/abs/2304.03819
Autor:
Yazdi, Yasaman K.
We review a formulation of the entanglement entropy of a quantum scalar field in terms of its spacetime two-point correlation functions. We discuss applications of this formulation to studying entanglement entropy in various settings in causal set th
Externí odkaz:
http://arxiv.org/abs/2212.13586
Autor:
Zhu, Yifeng Rocky, Yazdi, Yasaman K.
Publikováno v:
2024 Class. Quantum Grav. 41 045007
The Sorkin-Johnston (SJ) state is a candidate physical vacuum state for a scalar field in a generic curved spacetime. It has the attractive feature that it is covariantly and uniquely defined in any globally hyperbolic spacetime, often reflecting the
Externí odkaz:
http://arxiv.org/abs/2212.10592
Publikováno v:
2022 Class. Quantum Grav. 39 245004
Entanglement entropy in causal sets offers a fundamentally covariant characterisation of quantum field degrees of freedom. A known result in this context is that the degrees of freedom consist of a number of contributions that have continuum-like ana
Externí odkaz:
http://arxiv.org/abs/2111.05879
Publikováno v:
Class. Quantum Grav. 39 075017 (2022)
A more complete understanding of entanglement entropy in a covariant manner could inform the search for quantum gravity. We build on work in this direction by extending previous results to disjoint regions in $1+1$D. We investigate the entanglement e
Externí odkaz:
http://arxiv.org/abs/2110.07627
Publikováno v:
Class. Quantum Grav. 38 115001 (2021)
de Sitter cosmological horizons are known to exhibit thermodynamic properties similar to black hole horizons. In this work we study causal set de Sitter horizons, using Sorkin's spacetime entanglement entropy (SSEE) formula, for a conformally coupled
Externí odkaz:
http://arxiv.org/abs/2008.07697
Publikováno v:
2021 Class. Quantum Grav. 38 015011
We study discrete Lorentzian spectral geometry by investigating to what extent causal sets can be identified through a set of geometric invariants such as spectra. We build on previous work where it was shown that the spectra of certain operators der
Externí odkaz:
http://arxiv.org/abs/2008.02291