... • Newton’s Calculus developed into Classical Field Theory
due to studies in electromagnetism.
• When the electron was discovered Quantum Mechanics
• Later Einstein came up with the Special Theory of
• Relativity was combined with Quantum Mechanics to
form the Relativistic Quan ...
see flyer - Centre for Research in String Theory
... elementary particles. However, extracting quantitative predictions from QCD for low
energy or macroscopic phenomena is one of the outstanding challenges of theoretical
physics. String theory, originally developed as a fundamental unified theory of particle
physics and gravity, has also emerged as a ...
... String Theory is believed to bridge the gap
between General Relativity and Quantum
This is because Relativistic Quantum Field
Theory only works when gravity is ignored (very
General Relativity only works when we can
assume the universe can be described by
classical physics (no quantu ...
String Theory - Santa Rosa Junior College
... with continuous gravitational fields of relativity
Regarded as Theory of (Almost) Everything
Does not include gravitation; String theory
attempts to fix this and is consistent with
theories of quantum gravity at high energies
From the last time… - UW High Energy Physics
... – Electromagnetic and weak force have the same
interactions and strength at high energy
– Had to introduce the Higgs boson to explain the mass
of the weak force carriers and all other masses
... the gauge theory is strongly coupled we don’t know these mixed
equations… they turn out to be the EoM of strings in AdS!
Matteo Bertolini: Research
... world with D-branes. In this world, gauge degrees of
freedom are confined on the branes while gravity
degrees of freedom live in the full ten dimensional
space-time. Still, weak (as we like them to be)
gravity effects may be felt on the brane. In string
theory there are D-branes of different dimensi ...
Introduction to Strings
... • Closed string consists of left-moving and
right-moving modes, while they are related
in open strings
• Heterotic string is the composite of
superstring(right) and bosonic string(left)
• Type II string consists of superstring
sectors of the opposite (IIA) and the same
• Type I stri ...
Why 3+1 = 11 for small values of 7
... as a Calabi-Yau manifold. Specifically these manifolds are invaluable models for comptactification
because they leave much of the original supersymmetry intact. A Calabi-Yau N-fold has holonomy
SU(N) leaves 2^(1-N) of the original supersymmetry unbroken, which is essential for preserving the
... theory that describes everything... The
forces and the matter which make up
-The basic idea of supersymmetry is
that every fundamental particle has its
own so called “superpartner”. All
superpartners have same features as
their original particle but they have halfinteger spin.
-There a ...
list of abstracts - Faculdade de Ciências
... Having a common backbone with matrix models, coloured tensor models is a random geometry approach to quantum gravity in arbitrary
dimensions. In particular, regularly edge-coloured bipartite graphs—precisely the Feynman graphs of these theories—generalise ribbon graphs
and represent orientable PL-ma ...
Classical solutions of open string field theory
... Field theoretic description of all excitations of a
string (open or closed) at once.
Useful especially for physics of backgrounds:
tachyon condensation or instanton physics
Single Lagrangian field theory which should
around its various critical points describe
physics of diverse D-brane backgrounds, ...
Coordinate Noncommutativity, Quantum Groups and String Field
... Nature of the Big bang singularity;
Models of inflation based on string theory moduli;
Cosmology from Big crunch to Big bang;
Cosmology and holographic principle;
Quantum theory of Asym. de Sitter univ.
Possible imprints of string physics on
String and the Strong Force Summary/Review
... – Proton and neutron interactions are explained by the exchanges of pions, along with other mesons.
If particles can interact by exchanging one meson, they can generally interact by exchanging any
meson on that Regge trajectory. To get the full effect of these interactions, you must add up all
... and Relativity can be
used to describe some
but there is no theory
which can describes
all fundamental forces.
“Just because things get a little
dingy at the subatomic level doesn't
mean all bets are off.”
The String Theory
... However, those membranes could
reside in 5, 6, or 7 dimensions.
Therefore, they could be right next
to us but our three dimensional
existence could never interact with
them, but strings could.
Multi dimensions could explain why
gravity is so weak in our universe.
Gravity could be just as strong as
Why Does Space Exist?
... The following two posts (POST A & POST B) were first made in the comments sections
of the preceding article by Castelvecchi.
… “Physicists with a background in string theory or gauge theory dualities can
understand my paper with Kapustin on geometric Langlands, but for most physicists,
this t ...
Why I Still Like String Theory
... pointed out over at NEW, there are alternatives. LQG may succeed but to do so it must give a
low energy perturbation theory with gravitons or explain why things work differently. Other
alternatives mentioned by Smolin are more like toy models but I would add higher spin gravity
as another idea that ...
Topological string theory
In theoretical physics, topological string theory is a simplified version of string theory. The operators in topological string theory represent the algebra of operators in the full string theory that preserve a certain amount of supersymmetry. Topological string theory is obtained by a topological twist of the worldsheet description of ordinary string theory: the operators are given different spins. The operation is fully analogous to the construction of topological field theory which is a related concept. Consequently, there are no local degrees of freedom in topological string theory.There are two main versions of topological string theory: the topological A-model and the topological B-model. The results of the calculations in topological string theory generically encode all holomorphic quantities within the full string theory whose values are protected by spacetime supersymmetry. Various calculations in topological string theory are closely related to Chern–Simons theory, Gromov–Witten invariants, mirror symmetry, geometric Langlands Program, and many other topics.Topological string theory was established and is studied by physicists such as Edward Witten and Cumrun Vafa.