Article
Physics, Particles & Fields
Anna Pachol, Aneta Wojnar
Summary: We investigate the application of incorporating corrections from the Snyder model and the Generalized Uncertainty Principle into the equation of state to describe the behavior of matter in a low-mass star. The resulting equations exhibit striking similarities to those arising from modified Einstein gravity theories. By modeling matter with realism, we are able to effectively constrain the theory parameters beyond existing astrophysical bounds.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Andre Herkenhoff Gomes
Summary: In this paper, the connection between the generalized uncertainty principles (GUP) and Lorentz symmetry violations is further investigated. It is found that, at the nonrelativistic level and in the realm of commutative spacetime coordinates, a large class of GUP models cannot be experimentally distinguished from the predictions of the standard model extension (SME). This identification is then used to constrain GUP models using current limits on SME coefficients.
CLASSICAL AND QUANTUM GRAVITY
(2022)
Article
Physics, Multidisciplinary
S. Aghababaei, H. Moradpour, Elias C. Vagenas
Summary: In recent years, research has supported the proposal that uncertainty principles can solve the Hubble tension, leading to a study of an isotropic and homogeneous FRW universe and the modifications of the Hubble parameter by GUP and EUP models. It is suggested that the characteristics of quantum gravity also affect the CMB.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Physics, Fluids & Plasmas
Jin-Fu Ma, Jin-Fu Chen, C. P. Sun, Hui Dong
Summary: Landauer's principle imposes a fundamental limit on the energy cost of perfectly initializing a classical bit, but in practical operations, the finite operation time leads to an increase in energy cost. Specifically, when initializing the bit, the smaller the error, the higher the energy cost. A finite-time isothermal process can be used for bit initialization, and an optimal protocol to minimize the energy cost is proposed.
Article
Astronomy & Astrophysics
C. P. Burgess, R. Holman, Greg Kaplanek, Jerome Martin, Vincent Vennin
Summary: This study computes the rate at which super-Hubble cosmological fluctuations decohere during inflation, due to their gravitational interactions with unobserved shorter-wavelength scalar and tensor modes. The study utilizes Open Effective Field Theory methods to obtain a minimal result, considering only the self-interactions predicted by General Relativity in single-clock models. The findings reveal that decoherence is suppressed by the first slow-roll parameter and the energy density during inflation, but enhanced by the volume within the scale of interest.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2023)
Article
Physics, Multidisciplinary
B. Hamil, B. C. Lutfuoglu
Summary: One of the main features of Nouicer's GUP formalism is its consideration of deformation contributions to all orders of the Planck length. This manuscript applies the formalism to examine various interesting applications such as ideal gas thermodynamics, Unruh-Davies-DeWitt-Fulling effect, cosmological constant, and blackbody radiation spectrum. GUP corrected results are derived and compared with conventional ones in all cases.
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS
(2022)
Article
Physics, Particles & Fields
Sebastiano Segreto, Giovanni Montani
Summary: In this article, we analyze the extension of the GUP theory derived from the modified uncertainty principle, which satisfies the Jacobi identity in the context of associative algebras. We provide physical insights on the nature of these approaches in the cosmological arena and show that a natural formulation in infinite momentum space does not lead to a nonzero minimal uncertainty in position. Instead, a truncated formulation in momentum space is needed to recover this desired feature. Both quantization schemes are characterized and applied to study wave packets' behavior and evolution in time, shedding light on which generalizations of the GUP theory are more consistent with the string low energy limit and the existence of a minimum length in position.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Vijay Nenmeli, S. Shankaranarayanan, Vasil Todorinov, Saurya Das
Summary: This study utilizes the Generalized Uncertainty Principle to model features of quantum gravity and explores the applications of Stelle gravity in cosmology. It shows that Stelle gravity can be considered as a classical manifestation of maximum momentum and the GUP. Strong constraints on the GUP parameter are obtained from CMB observations, providing both lower and upper bounds.
Article
Physics, Particles & Fields
Giuseppe Gaetano Luciano
Summary: The Generalized Uncertainty Principle (GUP) is naturally predicted by several quantum gravity models, suggesting a minimal length at the Planck scale. In this study, the quadratic GUP is applied as a semiclassical approach to thermodynamic gravity, with the deformation parameter constrained using observational bounds from Big Bang Nucleosynthesis and primordial abundances of light elements. The results align well with existing bounds on beta derived from other cosmological studies.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Particles & Fields
Yen Chin Ong
Summary: The generalized uncertainty principle is a gravitational correction to Heisenberg's uncertainty principle, allowing us to explore quantum gravity features without a complete theory. In general relativity, we often work with metric tensors for calculating physical quantities like Hawking temperature and black hole shadow. Some attempts have been made to incorporate the GUP into an effective metric for such calculations. However, there are incorrect results due to using series truncation instead of the full GUP-corrected expressions, and a lack of guiding principle in constructing the correct effective metric.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Multidisciplinary
Heru Sukamto, Lila Yuwana, Agus Purwanto
Summary: The effect of minimal length on quantum heat engine systems is investigated using a system of trapped Fermi particles in an infinite potential well. The reversible Lenoir cycle is chosen as the thermodynamic cycle. Both single particle and multiparticle cases are considered. The results show that the minimal length enhances the efficiency of the engine when the width of the potential well tends to zero.
Article
Physics, Mathematical
Gabriele Barca, Eleonora Giovannetti, Giovanni Montani
Summary: This paper compares Polymer Quantum Mechanics and the Generalized Uncertainty Principle approach, and investigates their differences on both semiclassical and quantum levels. The authors apply these approaches to Bianchi I cosmology and find that Polymer Quantum Mechanics is associated with bouncing dynamics, while the singularity still exists in the case of the Generalized Uncertainty Principle. Additionally, the implications of wavepacket spreading are discussed.
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2022)
Article
Physics, Multidisciplinary
Heru Sukamto, Lila Yuwana, Agus Purwanto
Summary: This paper discusses the influence of minimal length on relativistic physical systems, particularly the efficiency of a relativistic quantum heat engine. The chosen working substance is a Dirac particle trapped in a one-dimensional infinite potential well. The efficiency of the quantum heat engine is calculated analytically and numerically in three thermodynamic cycles: Carnot, Otto, and Brayton cycles. The research reveals that the minimal length acts as a correction factor for relativistic energy and can either increase or decrease the efficiency of the relativistic quantum heat engine depending on the particle mass, expansion parameter, and thermodynamic cycle.
Article
Astronomy & Astrophysics
Nilay Bostan
Summary: This study investigates the impact of non-minimal coupling in Palatini gravity on inflationary parameters, focusing on single-field inflation models with non-zero vacuum expectation value. The analysis considers well-known symmetry-breaking potentials and shows their compatibility with recent measurements. Additionally, the study explores the inflationary predictions of selected values in the Palatini formalism.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Multidisciplinary
Sara Kanzi, Izzet Sakalli
Summary: This paper studies the GUP-modified Hawking radiation of rotating polytropic black hole given in the Boyer-Lindquist coordinates. The GUP-modified Klein-Gordon equation is applied to investigate the quantum tunneling of scalar particles. The reflection and transmission probabilities of the radiation are derived and discussed in detail.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
Mir Faizal, Barun Majumder
Article
Physics, Multidisciplinary
Ahmed Farag Ali, Mir Faizal, Barun Majumder
Article
Physics, Mathematical
Ahmed Farag Ali, Mir Faizal, Barun Majumder, Ravi Mistry
INTERNATIONAL JOURNAL OF GEOMETRIC METHODS IN MODERN PHYSICS
(2015)
Article
Astronomy & Astrophysics
Barun Majumder, Kent Yagi, Nicolas Yunes
Article
Astronomy & Astrophysics
Narayan Banerjee, Barun Majumder
Editorial Material
Physics, Particles & Fields
Ahmed Farag Ali, Giulia Gubitosi, Mir Faizal, Barun Majumder
ADVANCES IN HIGH ENERGY PHYSICS
(2017)
Article
Astronomy & Astrophysics
Ahmed Farag Ali, Barun Majumder
CLASSICAL AND QUANTUM GRAVITY
(2014)
Article
Astronomy & Astrophysics
Barun Majumder, Narayan Banerjee
GENERAL RELATIVITY AND GRAVITATION
(2013)
Article
Astronomy & Astrophysics
Barun Majumder
GENERAL RELATIVITY AND GRAVITATION
(2013)
Article
Astronomy & Astrophysics
Barun Majumder
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2013)
Article
Astronomy & Astrophysics
Barun Majumder
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2013)
Article
Astronomy & Astrophysics
Adel Awad, Ahmed Farag Ali, Barun Majumder
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2013)
Article
Physics, Particles & Fields
Remo Garattini, Barun Majumder
Article
Physics, Particles & Fields
Remo Garattini, Barun Majumder
Article
Astronomy & Astrophysics
Toral Gupta, Barun Majumder, Kent Yagi, Nicolas Yunes
CLASSICAL AND QUANTUM GRAVITY
(2018)
Article
Astronomy & Astrophysics
Nelson R. F. Braga, Octavio C. Junqueira
Summary: This study investigates the influence of rotation on the transition temperature of strongly interacting matter produced in non-central heavy ion collisions. By using a holographic description of an AdS black hole, the authors extend the analysis to the more realistic case where the matter spreads over a region around the rotational axis. The results show the coexistence of confined and deconfined phases and are consistent with the concept of local temperature in rotating frames developed by Tolman and Ehrenfest.
Article
Astronomy & Astrophysics
Bing Sun, Jiachen An, Zhoujian Cao
Summary: This paper investigates the effect of gravitational constant variation on the propagation of gravitational waves. By employing two analytical methods, the study finds that variations in the gravitational constant result in amplitude and phase corrections for gravitational waves, and the time variation of the gravitational constant can be constrained through the propagation of gravitational waves.
Article
Astronomy & Astrophysics
Abdellah Touati, Zaim Slimane
Summary: This letter presents the first study of Hawking radiation as a tunneling process within the framework of non-commutative gauge theory of gravity. The non-commutative Schwarzschild black hole is reconstructed using the Seiberg-Witten map and the star product. The emission spectrum of outgoing massless particles is computed using the quantum tunneling mechanism. The results reveal pure thermal radiation in the low-frequency scenario, but a deviation from pure thermal radiation in the high-frequency scenario due to energy conservation. It is also found that noncommutativity enhances the correlations between successively emitted particles.
Article
Astronomy & Astrophysics
Shahar Hod
Summary: The travel times of light signals between two antipodal points on a compact star's surface are calculated for two different trajectories. It is shown that, for highly dense stars, the longer trajectory along the surface may have a shorter travel time as measured by asymptotic observers. A critical value of the dimensionless density-area parameter is determined for constant density stars to distinguish cases where crossing through the star's center or following a semi-circular trajectory on the surface has a shorter travel time as measured by asymptotic observers.
