Results 211 to 220 of about 1,952,544 (384)

Quantum histories and quantum gravity

Journal of Physics: Conference Series, 2009
This paper reviews the histories approach to quantum mechanics. This discussion is then applied to theories of quantum gravity. It is argued that some of the quantum histories must approximate (in a suitable sense) to classical histories, if the correct classical regime is to be recovered.
openaire   +3 more sources

The Adaptive Trajectory of the Normal Force Vector in the Polishing of Curved Surface Component Robots

Advanced Intelligent Systems, EarlyView.
This study uses iterative learning control and voice coil motor to keep normal force constant in curved surface polishing. A mechanism‐data fusion model adjusts robotic posture via real‐time feedback for adaptive tracking control of normal force vector direction.
Jiale Xu, Haibin Huang, Hui Long, Shijing Lei   +3 more
wiley   +1 more source

Quantum Field Theory of Black Hole Perturbations with Backreaction: I General Framework

Universe
In a seminal work, Hawking showed that natural states for free quantum matter fields on classical spacetimes that solve the spherically symmetric vacuum Einstein equations are KMS states of non-vanishing temperature.
Thomas Thiemann
doaj   +1 more source

Three-dimensional quantum gravity coupled to Ising matter [PDF]

, 1993
Ray L. Renken, Simon Catterall, John B. Kogut   +2 more
openalex   +1 more source

Soft Robots Proprioception Through Stretchable Laser‐Induced Graphene Strain Sensors

Advanced Intelligent Systems, EarlyView.
This study demonstrates the potential of laser‐induced graphene and silicone sensors for soft pneumatic grippers’ proprioception. The sensors are thin, stretchable, mechanically transparent, and easy to integrate. Finite‐element method analysis identifies the finger's neutral bending plane and four sensor positions are tested to validate the ...
Giovanna De Luca, Anna Chiara Bressi, Radan Pathan, Niccolò Pagliarani, Martina Maselli, Francesco Greco, Matteo Cianchetti   +6 more
wiley   +1 more source

Solving topological 2D quantum gravity using Ward identities [PDF]

, 1993
David Montano, G. Rivlis
openalex   +1 more source

Ultrafast Untethered Levitation Device Utilized Squeeze Film for Omni‐Directional Transport

Advanced Intelligent Systems, EarlyView.
Untethered levitation device (106 g, 95 × 72 × 45 mm3) on squeeze film is generated by a piezoelectric actuator with onboard electronics (77 g). It achieves frictionless and omnidirectional movement over 1.4 and 3.0 ms−1 on horizontal and inclined surfaces respectively.
Yuta Sunohara, Soushi Ueno, Rintaro Minegishi, Chihiro Sekine, Yuta Kitamura, Yuna Sugiyama, Satoshi Ando, Akihiro Torii, Ohmi Fuchiwaki   +8 more
wiley   +1 more source

The Heisenberg Indeterminacy Principle in the Context of Covariant Quantum Gravity. [PDF]

Entropy (Basel), 2020
Tessarotto M, Cremaschini C.
europepmc   +1 more source

On the equivalence of topological and quantum 2D gravity [PDF]

, 1992
A. Marshakov, А. Миронов, А. Морозов   +2 more
openalex   +1 more source

Quantum conformal gravity

Journal of High Energy Physics
Abstract We present the manifestly covariant canonical operator formalism of a Weyl invariant (or equivalently, a locally scale invariant) gravity whose classical action consists of the well-known conformal gravity and Weyl invariant scalar-tensor gravity, on the basis of the Becchi-Rouet-Stora-Tyupin (BRST) formalism.
Ichiro Oda, Misaki Ohta
openaire   +3 more sources