33,876 research outputs found
Coupling a Self-Dual Tensor to Gravity in Six Dimensions
A recent result concerning interacting theories of self-dual tensor gauge
fields in six dimensions is generalized to include coupling to gravity. The
formalism makes five of the six general coordinate invariances manifest,
whereas the sixth one requires a non-trivial analysis. The result should be
helpful in formulating the world-volume action of the M theory five-brane.Comment: 7 pages, latex, no figure
Some Properties of Type I' String Theory
The T-dual formulation of Type I superstring theory, sometimes called Type I'
theory, has a number of interesting features. Here we review some of them
including the role of D0-branes and D8-branes in controlling possible gauge
symmetry enhancement.Comment: 10 pages; Submitted to a volume in memory of Yuri Golfand; v2:
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Some Recent Progress in AdS/CFT
Much of modern string theory research concerns AdS/CFT duality, or more
generally, gauge/gravity duality. The main subjects are a) Testing and
understanding such dualities by exploring how they work for systems with a lot
of supersymmetry b) Constructing and exploring approximate string theory duals
of QCD c) Applying gauge/gravity duality to other areas of physics such as
condensed matter and nuclear physics. I will briefly discuss the first topic.Comment: 13 pages; Contribution to the proceedings of a symposium celebrating
the 80th birthday of Murray Gell-Man
Quadrupole ionization gage measures ultrahigh vacuum
Quadrupole system, energized with a 200 MHz electric field, restrains ionizing electrons within the center of the ionization gage. Oscillatory trajectory of the electrons increases the probability of ionizing the gas molecules, lowers background X-ray level, and increases the signal-to-noise ratio
String Theory: Progress and Problems
String theory builds on the great legacy of Yukawa and Tomonaga: New degrees
of freedom and control of the UV are two important themes. This talk will give
an overview of some of the progress and some of the unsolved problems that
characterize string theory today. It is divided into two parts: (1) Connecting
String Theory to the Real World; (2) Gauge Theory/String Theory Duality. Two
other major subjects, which I will omit, are Black Holes in String Theory and
The Impact of String Theory on Mathematics.Comment: 14 pages; Presented at the Yukawa--Tomonaga Centennial Symposium v2:
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