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Supergravity was discovered in 1976 through the construction of pure four-dimensional supergravity with one gravitino. One important direction in the supergravity program was to try to construct four-dimensional = supergravity since this was an attractive candidate for a theory of everything, stemming from the fact that it unifies particles of all physically admissible spins into a single ...
Sze worked for Bell Labs until 1990, after which he returned to Taiwan and joined the faculty of National Chiao Tung University. [1] He is well known for his work in semiconductor physics and technology, including his 1967 invention (with Dawon Kahng) of the floating-gate transistor, [2] now widely used in non-volatile semiconductor memory devices.
Due to string dualities, the conjectured 11-dimensional M-theory is required to have 11-dimensional supergravity as a "low energy limit". However, this doesn't necessarily mean that string theory/M-theory is the only possible UV completion of supergravity; [ citation needed ] supergravity research is useful independent of those relations.
11th dimension may refer to: 11-dimensional supergravity , a field theory that combines the principles of supersymmetry and general relativity. 11-dimensional spacetime, which appears in M-theory , a proposed "master theory" that unifies the five superstring theories
IIA SUGRA is the dimensional reduction of 11-dimensional supergravity on a circle. This means that 11d supergravity on the spacetime M 10 × S 1 {\displaystyle M^{10}\times S^{1}\,} is equivalent to IIA supergravity on the 10-manifold M 10 {\displaystyle M^{10}\,} where one eliminates modes with masses proportional to the inverse radius of the ...
A semiconductor is a material that is between the conductor and insulator in ability to conduct electrical current. [1] In many cases their conducting properties may be altered in useful ways by introducing impurities (" doping ") into the crystal structure .
Supermembranes are hypothesized objects that live in the 11-dimensional theory called M-Theory and should also exist in eleven-dimensional supergravity. Supermembranes are a generalisation of superstrings to another dimension. Supermembranes are 2-dimensional surfaces. For example, they can be spherical or shaped like a torus.
Since the 1990s, some physicists such as Edward Witten believe that 11-dimensional M-theory, which is described in some limits by one of the five perturbative superstring theories, and in another by the maximally-supersymmetric eleven-dimensional supergravity, is the theory of everything. There is no widespread consensus on this issue.