String Theory Searches
for the Standard Model
Will string theorists find a solution that
describes the real world?
String theory offers the possibility of a route to the "Theory of Everything." It contains all of the ingredients that we see in nature: quarks, leptons, photons, gluons, and gravity. For a long time, string theorists hoped that their equations would have a unique solution describing the real world. In fact, it is not so. The equations of string theory have a huge number of solutions, and we are finding more every day.
The present surge of new results followed the insights of SLAC and Stanford University’s Shamit Kachru, Renata Kallosh, and Andrei Linde, as well as the Tata Institute's Sandip Trivedi. The work of these researchers provided a method for constructing a large number of distinct solutions to string theory.
String theory requires space-time to have ten dimensions. To obtain a universe that appears four-dimensional, the researchers looked for solutions in which the other six
dimensions are wrapped up as a specific type of compact space called a Calabi-Yau manifold.
To this geometry they then added various loops and sheets (called branes) that wrapped around the Calabi-Yau manifold, and various types of electric and magnetic fields that threaded along smooth closed paths. Kachru and his collaborators argued that there exist a huge number of solutions of this typeat least 10500, by some estimates.
U.C. Berkeley - Stanford
Tomorrow is the last day to apply for the Berkeley-Stanford Summer School on Synchrotron Radiation and
The course will run June 26-30 and will be based at the U.C. Berkeley
campus. Lectures will cover the process, technologies, and applications of
synchrotron radiation, including the basics of extreme ultra-violet, soft
x-ray, and x-ray radiation. The class will visit the Stanford Synchrotron Radiation Laboratory and Livermore's Advanced Light Source.
The U.C. Berkeley extension course offers space for forty graduate
students. Course details, including lectures, costs, optional
housing, and application guidelines, are
Electrical Safety Tip:
Grounding electrical equipment prevents lethal shocks. It is critical for an accelerator research facility
like SLAC to have an effective and well maintained grounding web. The main component
to the ground network is copper cable that can be found attached to cable
trays and welded to building columns. Only approved connectors
should be used to attach the cable to trays, racks and other devices.
An installation is only complete
once grounds are connected.
All buildings, cable plants and equipment racks must be properly grounded.
Do not disconnect grounds without proper authorization, and be sure to restore them. Your safety depends on