Results 41 to 50 of about 34,505 (198)
Algebraic Classification of Weyl Anomalies in Arbitrary Dimensions [PDF]
, 2007 Conformally invariant massless field systems involving only dimensionless parameters are known to describe particle physics at very high energy. In the presence of an external gravitational field, the conformal symmetry may generalize to Weyl invariance.
B. Zumino +8 more
core +2 more sources
SL(2,C) Gauge Theory of Gravitation and the Quantization of the Gravitational Field
International Journal of Theoretical Physics, 1998 A new approach to quantize the gravitational field is presented. It is based on the observation that the quantum character of matter becomes more significant as one gets closer to the big bang. As the metric loses its meaning, it makes sense to consider Schrodinger's three generic types of manifolds - unconnected differentiable, affinely connected, and
Carmeli, Moshe, Malin, Shimon
openaire +3 more sources
Boost invariance of the gravitational field dynamics: quantization without time gauge [PDF]
Classical and Quantum Gravity, 2007 9 pages, accepted for publication on Classical and Quantum ...
Cianfrani, Francesco, Montani, Giovanni
openaire +2 more sources
Study of Free‐Space Optical Quantum Network: Review and Prospectives
Advanced Science, EarlyView.Free from the constraints of fiber connections, free‐space quantum network enables longer and more flexible quantum network connections. This review summarizes and comparatively analyzes free‐space quantum network experiments based on ground stations, satellites, and mobile platforms.
Hua‐Ying Liu, Zhenda Xie, Shining Zhu
wiley +1 more source
Ground-state Wigner functional of linearized gravitational field
, 2011 The deformation quantization formalism is applied to the linearized gravitational field. Standard aspects of this formalism are worked out before the ground state Wigner functional is obtained.
Deser S. +4 more
core +1 more source
Work Versus Force: Simultaneous Processes for Describing Interactions
Advanced Physics Research, EarlyView.ABSTRACT Achieving a unified description of interactions remains an open challenge in theoretical physics, which currently describes four fundamental forces. This situation may be viewed differently when interactions are formulated in terms of processes (work as actio) rather than forces (force as actio), not only at the macroscopic level but also at ...
Grit Kalies +2 more
wiley +1 more source
Quantum Gravity: Has Spacetime Quantum Properties? [PDF]
, 2009 The incompatibility between GR and QM is generally seen as a sufficient motivation for the development of a theory of Quantum Gravity. If - so a typical argumentation - QM gives a universally valid basis for the description of all natural systems, then ...
Hedrich, Reiner
core +1 more source
Inflationary scalar spectrum in loop quantum cosmology [PDF]
, 2007 In the context of loop quantum cosmology, we consider an inflationary era driven by a canonical scalar field and occurring in the semiclassical regime, where spacetime is a continuum but quantum gravitational effects are important. The spectral amplitude
Ashtekar A +45 more
core +1 more source
Field Programmable Gate Array‐Based Control Systems for Highly Stable Laser Applications
Advanced Photonics Research, Volume 7, Issue 4, April 2026.This review highlights the transition from analog to FPGA‐based digital architectures for laser frequency stabilization, noting their superior latency and flexibility. It focuses on Modulation Transfer Spectroscopy (MTS) as a robust, background‐free method for high‐precision locking that minimizes residual amplitude modulation.
Prosenjit Majumder, Rakesh Tirupathi
wiley +1 more source
Low-dimensional de Sitter quantum gravity
Journal of High Energy Physics, 2020 We study aspects of Jackiw-Teitelboim (JT) quantum gravity in two-dimensional nearly de Sitter (dS) spacetime, as well as pure de Sitter quantum gravity in three dimensions.
Jordan Cotler +2 more
doaj +1 more source