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Daniel Robbins
Articles & Books From Daniel Robbins
Article / Updated 09-14-2023
The multiverse is a theory that suggests our universe is not the only one, and that many universes exist parallel to each other. These distinct universes within the multiverse theory are called parallel universes. A variety of different theories lend themselves to a multiverse viewpoint.Not all physicists really believe that these universes exist.
Article / Updated 04-27-2023
General relativity was Einstein’s theory of gravity, published in 1915, which extended special relativity to take into account non-inertial frames of reference — areas that are accelerating with respect to each other.General relativity takes the form of field equations, describing the curvature of space-time and the distribution of matter throughout space-time.
Article / Updated 04-14-2023
General relativity was Einstein’s theory of gravity, published in 1915, which extended special relativity to take into account non-inertial frames of reference — areas that are accelerating with respect to each other. General relativity takes the form of field equations, describing the curvature of space-time and the distribution of matter throughout space-time.
Article / Updated 02-07-2023
Many physicists feel that string theory will ultimately be successful at resolving the hierarchy problem of the Standard Model of particle physics. Although it is an astounding success, the Standard Model hasn’t answered every question that physics hands to it. One of the major questions that remains is the hierarchy problem, which seeks an explanation for the diverse values that the Standard Model lets physicists work with.
Article / Updated 12-14-2022
For most interpretations, superstring theory requires a large number of extra space dimensions to be mathematically consistent: M-theory requires ten space dimensions. With the introduction of branes as multidimensional objects in string theory, it becomes possible to construct and imagine wildly creative geometries for space that correspond to different possible particles and forces.
Article / Updated 03-26-2016
Although string theory is a young science, it has had many notable achievements. What follows are some landmark events in the history of string theory:
1968: Gabriele Veneziano originally proposes the dual resonance model.
1970: String theory is created when physicists interpret Veneziano’s model as describing a universe of vibrating strings.
Article / Updated 03-26-2016
String theory is a work in progress, so trying to pin down exactly what the science is, or what its fundamental elements are, can be kind of tricky. The key string theory features include:
All objects in our universe are composed of vibrating filaments (strings) and membranes (branes) of energy.
String theory attempts to reconcile general relativity (gravity) with quantum physics.
Article / Updated 03-26-2016
String theory’s concept of supersymmetry is a fancy way of saying that each particle has a related particle called a superpartner. Keeping track of the names of these superpartners can be tricky, so here are the rules in a nutshell.
The superpartner of a fermion begins with an “s,” so the superpartner of an “electron” is the “selectron” and the superpartner of the “quark” is the “squark.
Article / Updated 03-26-2016
String theory has gone through many name changes over the years. This list provides an at-a-glance look at some of the major names for different types of string theory. Some versions have more specific variations, which are shown as subentries. (These different variants are related in complex ways and sometimes overlap, so this breakdown into subentries is based on the order in which the theories developed.
Article / Updated 03-26-2016
To many, the goal of string theory is to be a “theory of everything” — that is, to be the single physical theory that, at the most fundamental level, describes all of physical reality. If successful, string theory could explain many of the fundamental questions about our universe.
Explaining matter and mass
One of the major goals of current string theory research is to construct a solution of string theory that contains the particles that actually exist in our universe.
