158 citations · 3.2k across the 126 of their papers we have counts for
5 papers · 1 filter
Edge States: Topological Insulators, Superconductors and QCD Chiral Bags
M. Asorey, A. P. Balachandran, J. M. Perez-Pardo
The dynamics of the magnetic field in a superconducting phase is described by an effective massive bosonic field theory. If the superconductor is confined in a domain M with bounda…
Entanglement and Particle Identity: A Unifying Approach
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz +1
It has been known for some years that entanglement entropy obtained from partial trace does not provide the correct entanglement measure when applied to systems of identical partic…
Algebraic Approach to Entanglement and Entropy
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz +1
We present a general approach to quantum entanglement and entropy that is based on algebras of observables and states thereon. In contrast to more standard treatments, Hilbert spac…
Quantum Entropic Ambiguities: Ethylene
A. P. Balachandran, Amilcar R. de Queiroz, S. Vaidya
In a quantum system, there may be many density matrices associated with a state on an algebra of observables. For each density matrix, one can compute its entropy. These are in gen…
Spontaneous Lorentz Violation in Gauge Theories
A. P. Balachandran, S. Vaidya
Frohlich, Morchio and Strocchi long ago proved that Lorentz invariance is spontaneously broken in QED because of infrared effects. We develop a simple model where consequences of t…