Results 51 to 60 of about 2,111,128 (267)
SYNCHRONOUS QUANTUM GRAVITY [PDF]
International Journal of Modern Physics A, 2008 The implications of restricting the covariance principle within a Gaussian gauge are developed both on a classical and a quantum level. Hence, we investigate the cosmological issues of the obtained Schrödinger Quantum Gravity with respect to the asymptotically early dynamics of a generic Universe.
Giovanni Montani +2 more
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Defects in Jackiw-Teitelboim quantum gravity [PDF]
Journal of High Energy Physics, 2019 We classify and study defects in 2d Jackiw-Teitelboim gravity. We show these are holographically described by a deformation of the Schwarzian theory where the reparametrization mode is integrated over different coadjoint orbits of the Virasoro group.
T. Mertens, G. Turiaci
semanticscholar +1 more source
Tabletop experiments for quantum gravity: a user’s manual [PDF]
Classical and quantum gravity, 2018 Recent advances in cooling, control, and measurement of mechanical systems in the quantum regime have opened the possibility of the first direct observation of quantum gravity, at scales achievable in experiments.
D. Carney, P. Stamp, Jacob M. Taylor
semanticscholar +1 more source
Fermions in quantum gravity [PDF]
Physical Review Letters, 1994 We study the quantum fermions+gravity system, that is, the gravitational counterpart of QED. We start from the standard Einstein-Weyl theory, reformulated in terms of Ashtekar variables; and we construct its non- perturbative quantum theory by extending the loop representation of general relativity.
Carlo Rovelli, Hugo A. Morales-Técotl
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An Aerial–Aquatic Hitchhiking Robot with Remora‐Inspired Tactile Sensors and Thrust Vectoring Units
Advanced Intelligent Systems, EarlyView., 2023 An untethered aerial–aquatic hitchhiking robot that can be remotely controlled for flying, swimming, and transiting air–water boundaries rapidly (0.16 s), is presented. Notably, it can autonomously attach to various surfaces in both air and water environments using a remora‐inspired suction disc with flexible tactile sensors.
Lei Li +12 more
wiley +1 more source
Emergence of Weak Coupling at Large Distance in Quantum Gravity. [PDF]
Physical Review Letters, 2018 The Ooguri-Vafa swampland conjectures claim that in any consistent theory of quantum gravity, when venturing to large distances in scalar field space, a tower of particles will become light at a rate that is exponential in the field-space distance.
B. Heidenreich, M. Reece, Tom Rudelius
semanticscholar +1 more source
Newtonian quantum gravity. [PDF]
Physics Essays, 2010 A Newtonian approach to quantum gravity is studied. At least for weak gravitational fields it should be a valid approximation. Such an approach could be used to point out problems and prospects inherent in a more exact theory of quantum gravity, yet to be discovered. Newtonian quantum gravity, e.g., shows promise for prohibiting black holes altogether (
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Phenomenological Quantum Gravity [PDF]
AIP Conference Proceedings, 2007 Planck scale physics represents a future challenge, located between particle physics and general relativity. The Planck scale marks a threshold beyond which the old description of spacetime breaks down and conceptually new phenomena must appear. In the last years, increased efforts have been made to examine the phenomenology of quantum gravity, even if
Lee Smolin, Sabine Hossenfelder
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