158 citations · 3.2k across the 126 of their papers we have counts for
6 papers · 1 filter
Entropy of Quantum States: Ambiguities
A. P. Balachandran, A. R. de Queiroz, S. Vaidya
The von Neumann entropy of a generic quantum state is not unique unless the state can be uniquely decomposed as a sum of extremal or pure states. As pointed out to us by Sorkin, th…
Quantum Physics and Fluctuating Topologies: Survey
M. Asorey, A. P. Balachandran, G. Marmo +4
The spin-statistics connection, quantum gravity and other physical considerations suggest that classical space-time topology is not an immutable attribute and can change in quantum…
Spontaneous Breaking of Lorentz Symmetry and Vertex Operators for Vortices
A. P. Balachandran, Seckin Kurkcuoglu, Amilcar R. de Queiroz
We first review the spontaneous Lorentz symmetry breaking in the presence of massless gauge fields and infraparticles. This result was obtained long time ago in the context of rigo…
Entanglement, Particle Identity and the GNS Construction: A Unifying Approach
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz +1
A novel approach to entanglement, based on the Gelfand-Naimark-Segal (GNS) construction, is introduced. It considers states as well as algebras of observables on an equal footing.…
Electric Dipole Moment from QCD and How It Vanishes for Mixed States
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz
In a previous paper [1], we studied the mass and formulated its chirally symmetric coupling to fermions which induces electric dipole moment (EDM). Here we calculate the EDM t…
Novel Studies on the η' Effective Lagrangian
A. P. Balachandran, T. R. Govindarajan, Amilcar R. de Queiroz
The effective Lagrangian for η' incorporating the effect of the QCD θ-angle has been developed previously. We revisit this Lagrangian and carry out its canonical quantization with…