Heisenberg's proposal was revived in when Murray Gell-Mann recognized that dispersion relations —like those discovered by Hendrik Kramers and Ralph Kronig in the s see Kramers—Kronig relations —allow the formulation of a notion of causality, a notion that events in the future would not influence events in the past, even when the microscopic notion of past and future are not clearly defined. Douglas 's discovery of the string theory landscape which suggests that string theory has a large number of inequivalent false vacua led to much discussion of what string theory might eventually be expected to predict, and how cosmology can be incorporated into the theory. Through the combined efforts of many researchers, string theory has developed into a broad and varied subject with connections to quantum gravityparticle and condensed matter physicscosmologyand pure mathematics. Olive led to a family of tachyon-free unitary free string theories,  the first consistent superstring theories see below. Jun 28, in Astronomy She will, ta da, want you. Kaluza—Klein theory Compactification Why 10 dimensions?
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Why String Theory Still Offers Hope We Can Unify Physics
Oct 08, in General Physics A theory developed with the late Professor Stephen Hawking stating that the universe is more simple and uniform than current models suggest was so shocking that it had to be sat on for a while before it was released to the Your email address will not be published. It all harks back to your good old self confidence and belief. This led to the concept of "spinning strings", and pointed the way to a method for removing the problematic tachyon see RNS formalism. A new conjecture is the cause of excitement in the string theory community. Join Date Sep Gender: