Strings String theory is an active research framework in particle physics that attempts to reconcile quantum mechanics and general relativity. It is a.

Презентация:



Advertisements
Похожие презентации
General relativity. General relativity, or the general theory of relativity, is the geometric theory of gravitation published by Albert Einstein in 1916.
Advertisements

Witten Edward Witten (born August 26, 1951) is an American theoretical physicist with a focus on mathematical physics who is a professor of Mathematical.
Electromagnetism. Electromagnetism is the branch of science concerned with the forces that occur between electrically charged particles. In electromagnetic.
Special relativity. Special relativity (SR, also known as the special theory of relativity or STR) is the physical theory of measurement in an inertial.
Knot theory. In topology, knot theory is the study of mathematical knots. While inspired by knots which appear in daily life in shoelaces and rope, a.
Unknot The unknot arises in the mathematical theory of knots. Intuitively, the unknot is a closed loop of rope without a knot in it. A knot theorist would.
Theory of everything. A theory of everything (ToE) or final theory is a putative theory of theoretical physics that fully explains and links together.
PERT/CPM PROJECT SCHEDULING Allocation of resources. Includes assigning the starting and completion dates to each part (or activity) in such a manner that.
Centrifugal force (rotating reference frame). Centrifugal force (from Latin centrum "center" and fugere "to flee") can generally be any force directed.
Gravitational wave. In physics, gravitational waves are ripples in the curvature of spacetime which propagate as a wave, travelling outward from the source.
7/23/ :59:31 AMRefresher course in Chemistry; Sept.20-Oct.12, Magnetic Resonance Phenomenon is a manifestation due to the presence of INTRINSIC.
Maxwell's equations. Maxwell's equations are a set of partial differential equations that, together with the Lorentz force law, form the foundation of.
Gravitation. Gravitation, or gravity, is a natural phenomenon by which physical bodies attract with a force proportional to their masses. Gravitation.
Coriolis effect. In physics, the Coriolis effect is a deflection of moving objects when they are viewed in a rotating reference frame. In a reference.
Michael Marchenko. In mathematics, a sequence is an ordered list of objects (or events). Like a set, it contains members (also called elements, or terms),
Brief introduction to the general genetic law of development Nikolai Veresov 1.
Hawking Stephen William Hawking, CH, CBE, FRS, FRSA (born 8 January 1942) is a British theoretical physicist and author. His key scientific works to date.
Globalization Globalization is a process influences of various factors of the international value (for example, close economic and political communications,
Benford Benford's law, also called the first-digit law, states that in lists of numbers from many (but not all) real-life sources of data, the leading.
Topology Topology (from the Greek τόπος, place, and λόγος, study) is a major area of mathematics concerned with properties that are preserved under continuous.
Транксрипт:

Strings

String theory is an active research framework in particle physics that attempts to reconcile quantum mechanics and general relativity. It is a contender for a theory of everything (TOE), a self-contained mathematical model that describes all fundamental forces and forms of matter.

String theory posits that the electrons and quarks within an atom are not 0-dimensional objects, but rather 1- dimensional oscillating lines ("strings"). The earliest string model, the bosonic string, incorporated only bosons, although this view developed to the superstring theory, which posits that a connection (a "supersymmetry") exists between bosons and fermions. String theories also require the existence of several extra dimensions to the universe that have been compactified into extremely small scales, in addition to the four known spacetime dimensions.

The theory has its origins in an effort to understand the strong force, the dual resonance model (1969). Subsequent to this, five different superstring theories were developed that incorporated fermions and possessed other properties necessary for a theory of everything. Since the mid-1990s, in particular due to insights from dualities shown to relate the five theories, an eleven-dimensional theory called M-theory is believed to encompass all of the previously distinct superstring theories.

Many theoretical physicists (e.g., Stephen Hawking, Edward Witten, Juan Maldacena, and Leonard Susskind) believe that string theory is a step towards the correct fundamental description of nature. This is because string theory allows for the consistent combination of quantum field theory and general relativity, agrees with general insights in quantum gravity (such as the holographic principle and Black hole thermodynamics), and because it has passed many non- trivial checks of its internal consistency. According to Hawking in particular, "M-theory is the only candidate for a complete theory of the universe. Nevertheless, other physicists, such as Feynman and Glashow, have criticized string theory for not providing novel experimental predictions at accessible energy scales.