scholarly journals Exact topological quantum order inD=3and beyond: Branyons and brane-net condensates

2007 ◽  
Vol 75 (7) ◽  
Author(s):  
H. Bombin ◽  
M. A. Martin-Delgado
2010 ◽  
Vol 51 (9) ◽  
pp. 093512 ◽  
Author(s):  
Sergey Bravyi ◽  
Matthew B. Hastings ◽  
Spyridon Michalakis

2009 ◽  
Vol 324 (5) ◽  
pp. 977-1057 ◽  
Author(s):  
Zohar Nussinov ◽  
Gerardo Ortiz

2019 ◽  
Vol 7 (5) ◽  
Author(s):  
Abhinav Prem ◽  
Dominic Williamson

We discuss the procedure for gauging on-site Z_2Z2 global symmetries of three-dimensional lattice Hamiltonians that permute quasi-particles and provide general arguments demonstrating the non-Abelian character of the resultant gauged theories. We then apply this general procedure to lattice models of several well known fracton phases: two copies of the X-Cube model, two copies of Haah’s cubic code, and the checkerboard model. Where the former two models possess an on-site Z_2Z2 layer exchange symmetry, that of the latter is generated by the Hadamard gate. For each of these models, upon gauging, we find non-Abelian subdimensional excitations, including non-Abelian fractons, as well as non-Abelian looplike excitations and Abelian fully mobile pointlike excitations. By showing that the looplike excitations braid non-trivially with the subdimensional excitations, we thus discover a novel gapped quantum order in 3D, which we term a ‘panoptic" fracton order. This points to the existence of parent states in 3D from which both topological quantum field theories and fracton states may descend via quasi-particle condensation. The gauged cubic code model represents the first example of a gapped 3D phase supporting (inextricably) non-Abelian fractons that are created at the corners of fractal operators.


2015 ◽  
Vol 91 (8) ◽  
Author(s):  
Tahereh Mazaheri ◽  
Gerardo Ortiz ◽  
Zohar Nussinov ◽  
Alexander Seidel

2019 ◽  
Author(s):  
Vitaly Kuyukov

Many approaches to quantum gravity consider the revision of the space-time geometry and the structure of elementary particles. One of the main candidates is string theory. It is possible that this theory will be able to describe the problem of hierarchy, provided that there is an appropriate Calabi-Yau geometry. In this paper we will proceed from the traditional view on the structure of elementary particles in the usual four-dimensional space-time. The only condition is that quarks and leptons should have a common emerging structure. When a new formula for the mass of the hierarchy is obtained, this structure arises from topological quantum theory and a suitable choice of dimensional units.


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