Results 171 to 180 of about 67,287 (207)

Structural dynamics of the midnolin-proteasome during ubiquitin-independent substrate turnover. [PDF]

Nat Commun
Zhu C, Qin L, Dai Z, Zuo P, Yang A, Zhong L, Lin Z, Liang L.   +7 more
europepmc   +1 more source

Extended phase space thermodynamics of regular-AdS black hole. [PDF]

Sci Rep
Rehan M, Islam SU, Ghosh SG.
europepmc   +1 more source

<i>Ab initio</i> electronic structure calculations of lanthanide single-molecule magnets; a practical guide.

Chem Soc Rev
Chilton NF.
europepmc   +1 more source

Nonperturbative solutions for canonical quantum gravity

Nonperturbative solutions for canonical quantum gravity
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A constraint on canonical quantum gravity?

Nature, 2003
Gamma rays from the γ-ray burst (GRB) 021206 have been reported to be strongly linearly polarized1, with the estimated degree of polarization (80 ± 20%) being close to the absolute maximum of 100% — affording us the opportunity to constrain models of quantum gravity, which has had 1010 years to act on the photons as they travelled towards us.
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Functional integrals and canonical quantum gravity

Physical Review D, 1992
The functional-integral sum-over-histories formulation of quantum gravity in the canonical Arnowitt-Deser-Misner formalism is examined. Reduced phase-space quantization (RPSQ) is contrasted with Dirac quantization (DQ). While it does not appear that RPSQ is even defined for gravity, there do exist minisuperspace models in which different ...
, Guven, , Ryan
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Canonical approach to quantum gravity

Classical and Quantum Gravity, 1987
Summary: Dirac's canonical programme for the quantization of gravity is discussed. The order of operators in the `kinetic' part of the generator of normal deformations, \(\hat H_{\perp}\), is chosen to give the Laplace-Beltrami form. This follows from the requirement of invariance of the quantum theory under arbitrary contact transformations of the ...
Christodoulakis, Theodosios, Zanelli, Jorge   +1 more
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Unimodular theory of canonical quantum gravity

Physical Review D, 1989
Einstein's theory of gravity is reformulated so that the cosmological constant becomes an integration constant of the theory, rather than a "coupling" constant. However, in the Hamiltonian form of the theory, the Hamiltonian constraint is missing, while the usual momentum constraints are still present.
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Canonical Quantum Gravity

1992
Dirac’s theory of constrained Hamiltonian systems is first described, discussing in detail primary and secondary constraints, first-class and second-class constraints, Dirac brackets, effective Hamiltonian, total Hamiltonian and extended Hamiltonian. On quantization, the operator versions of first-class constraints become supplementary conditions on ...
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