79 citations · 399 across the 27 of their papers we have counts for
27 papers
The Lorentzian Space-Times of the Orientation-Orbifold String Systems
M. B. Halpern
To illustrate our recent discussions of the target space-times in general orbifold-string theories of permutation-type, we return here to a detailed analysis of some simple example…
The Orbifolds of Permutation-Type as Physical String Systems at Multiples of V. Cyclic Permutation Orbifolds
M. B. Halpern
I consider the prime free-bosonic permutation orbifolds as interacting physical string systems at . As a first step, I introduce twisted tree dia…
The Orbifolds of Permutation-Type as Physical String Systems at Multiples of III. The Spectra of Strings
M. B. Halpern
In the second paper of this series, I obtained the twisted BRST systems and extended physical-state conditions of all twisted open and closed strings. In this paper,…
The Orbifolds of Permutation-Type as Physical String Systems at Multiples of c=26 II. The Twisted BRST Systems of \hatc=52 Matter
M. B. Halpern
This is the second in a series of papers which consider the orbifolds of permutation-type as candidates for new physical string systems at higher central charge. In the first paper…
The General Twisted Open WZW String
M. B. Halpern, C. Helfgott
We recently studied two large but disjoint classes of twisted open WZW strings: the open-string sectors of the WZW orientation orbifolds and the so-called basic class of twisted op…
A Basic Class of Twisted Open WZW Strings
M. B. Halpern, C. Helfgott
Recently, Giusto and Halpern reported the open-string description of a certain basic class of untwisted open WZW strings, including their associated non-commutative geometry and op…