Theory of quantum gravity, merging quantum mechanics and general relativity
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Beyond the Standard Model
Simulated Large Hadron Collider CMS particle detector data depicting a Higgs boson produced by colliding protons decaying into hadron jets and electrons
Standard Model
Evidence
Hierarchy problem
Dark matter
Dark energy
Quintessence
Phantom energy
Dark radiation
Dark photon
Cosmological constant problem
Strong CP problem
Neutrino oscillation
Theories
Brans–Dicke theory
Cosmic censorship hypothesis
Fifth force
F-theory
Theory of everything
Unified field theory
Grand Unified Theory
Technicolor
Kaluza–Klein theory
6D (2,0) superconformal field theory
Noncommutative quantum field theory
Quantum cosmology
Brane cosmology
String theory
Superstring theory
M-theory
Mathematical universe hypothesis
Mirror matter
Randall–Sundrum model
N = 4 supersymmetric Yang–Mills theory
Twistor string theory
Dark fluid
Doubly special relativity
de Sitter invariant special relativity
Causal fermion systems
Black hole thermodynamics
Unparticle physics
Graviphoton
Graviscalar
Graviton
Gravitino
Massive gravity
Gauge gravitation theory
Gauge theory gravity
CPT symmetry
Supersymmetry
MSSM
NMSSM
Superstring theory
M-theory
Supergravity
Supersymmetry breaking
Extra dimensions
Large extra dimensions
Quantum gravity
False vacuum
String theory
Spin foam
Quantum foam
Quantum geometry
Loop quantum gravity
Quantum cosmology
Loop quantum cosmology
Causal dynamical triangulation
Causal fermion systems
Causal sets
Canonical quantum gravity
Semiclassical gravity
Superfluid vacuum theory
Experiments
ANNIE
Gran Sasso
INO
LHC
SNO
Super-K
Tevatron
NOvA
v
t
e
Loop quantum gravity (LQG) is a theory of quantum gravity that incorporates matter of the Standard Model into the framework established for the intrinsic quantum gravity case. It is an attempt to develop a quantum theory of gravity based directly on Albert Einstein's geometric formulation rather than the treatment of gravity as a mysterious mechanism (force). As a theory, LQG postulates that the structure of space and time is composed of finite loops woven into an extremely fine fabric or network. These networks of loops are called spin networks. The evolution of a spin network, or spin foam, has a scale above the order of a Planck length, approximately 10−35 meters, and smaller scales are meaningless. Consequently, not just matter, but space itself, prefers an atomic structure.
The areas of research, which involve about 30 research groups worldwide,[1] share the basic physical assumptions and the mathematical description of quantum space. Research has evolved in two directions: the more traditional canonical loop quantum gravity, and the newer covariant loop quantum gravity, called spin foam theory. The most well-developed theory that has been advanced as a direct result of loop quantum gravity is called loop quantum cosmology (LQC). LQC advances the study of the early universe, incorporating the concept of the Big Bang into the broader theory of the Big Bounce, which envisions the Big Bang as the beginning of a period of expansion that follows a period of contraction, which has been described as the Big Crunch.
^Rovelli 2008.
and 29 Related for: Loop quantum gravity information
Loopquantumgravity (LQG) is a theory of quantumgravity that incorporates matter of the Standard Model into the framework established for the intrinsic...
Quantumgravity (QG) is a field of theoretical physics that seeks to describe gravity according to the principles of quantum mechanics. It deals with environments...
The history of loopquantumgravity spans more than three decades of intense research. General relativity is the theory of gravitation published by Albert...
Loopquantum cosmology (LQC) is a finite, symmetry-reduced model of loopquantumgravity (LQG) that predicts a "quantum bridge" between contracting and...
Hartle–Hawking state, Regge calculus, the Wheeler–DeWitt equation and loopquantumgravity. In the Hamiltonian formulation of ordinary classical mechanics the...
This is a list researchers in the physics field of loopquantumgravity who have Wikipedia articles. Abhay Ashtekar, Pennsylvania State University, United...
relativity theory and quantum theory. Such an approach is attempted for instance with loopquantum cosmology, loopquantumgravity, string theory and causal...
of quantumgravity. These structures are employed in loopquantumgravity as a version of quantum foam. The covariant formulation of loopquantum gravity...
cosmological inflation, and loopquantumgravity. Also, a specific microscopic model has been proposed that indeed leads to entropic gravity emerging at large scales...
Induced gravity (or emergent gravity) is an idea in quantumgravity that spacetime curvature and its dynamics emerge as a mean field approximation of...
research on loopquantumgravity may eventually play a fundamental role in a theory of everything, but that is not its primary aim. Loopquantumgravity also...
Jan Ambjørn and Jerzy Jurkiewicz, is an approach to quantumgravity that, like loopquantumgravity, is background independent. This means that it does...
appearing in loopquantumgravity (LQG), a nonperturbative theory of quantumgravity. The Immirzi parameter measures the size of the quantum of area in...
~10−26 s. A detailed study of the quantum geometry of a black hole event horizon has been made using loopquantumgravity. Loop-quantization does not reproduce...
triangulations approach to quantumgravity. Augusto Sagnotti: the physicist who demonstrated that perturbative quantumgravity diverges at two loops, and made a number...
to quantumgravity theory, in particular the approach known as loopquantumgravity. He advocates that the two primary approaches to quantumgravity, loop...
United States. Rovelli works mainly in the field of quantumgravity and is a founder of loopquantumgravity theory. He has also worked in the history and philosophy...
Lorentz transformation. In Quantumgravity, Lorentz invariance measures the universal features in the hypothetical loopquantumgravity universes, which is a...
cosmology theory of gravity (1982) by G.A. Barber in which the Brans–Dicke theory is modified to allow mass creation Loopquantumgravity (1988) by Carlo...
process in string theory. A very different approach to quantumgravity called loopquantumgravity is fully non-perturbative and manifestly background-independent:...
the quantum volume of a cycle is computed from the mass of a brane wrapped on this cycle. In an alternative approach to quantumgravity called loop quantum...
In loopquantumgravity theory, a Planck star is a hypothetical astronomical object, theorized as a compact, exotic star, that exists within a black hole's...
proposed as a result of the problems created by quantum mechanics. One model, using loopquantumgravity, aims to explain the beginnings of the universe...
reconciliation of gravity to the current particle physics theory is not solved; many theories have addressed this problem, such as loopquantumgravity, string...
Semiclassical gravity is an approximation to the theory of quantumgravity in which one treats matter and energy fields as being quantum and the gravitational...
hypothesis, gravitational singularities may not be observable. If loopquantumgravity is correct, naked singularities may be possible in nature. When a...
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