158 citations · 3.2k across the 126 of their papers we have counts for
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Disorder-free localisation in continuous-time quantum walks : Role of symmetries
A. P. Balachandran, Anjali Kundalpady, Pramod Padmanabhan +1
We investigate the phenomenon of disorder-free localisation in quantum systems with global permutation symmetry. We use permutation group theory to systematically construct permuta…
Confinement and Deconfinement in Gauge Theories: A Quantum Field Theory
A. P. Balachandran
After a brief recount of small and large gauge transformations and the nature of observables, we discuss superselection sectors in gauge theories. There are an infinity of them, cl…
Violation of the Landau-Yang theorem from Infrared Lorentz Symmetry Breaking
M. Asorey, A. P. Balachandran, Arshad Momen +1
Lorentz symmetry forbids decays of massive spin-1 particle like the into two massless photons, a result known as the Landau-Yang theorem. But it is known that infrared effect…