26 citations · 141 across the 24 of their papers we have counts for
25 papers
Ontology and Quantum Mechanics
N. D. Hari Dass
The issue of ontology in quantum mechanics, or equivalently the issue of the reality of the wave function is critically examined within standard quantum theory. It is argued that t…
Freeman Dyson and Gravitational Spin Precession
N. D. Hari Dass
In 1974 Hulse and Taylor discovered the binary pulsar. At that time Prof. Dyson was visiting the Max Planck Institute for Physics at Munich, where I was also working. He initiated…
The Superposition Principle in Quantum Mechanics - did the rock enter the foundation surreptitiously?
N. D. Hari Dass
The superposition principle forms the very backbone of quantum theory. The resulting linear structure of quantum theory is structurally so rigid that tampering with it may have ser…
A critique of Sadi Carnot's work and a mathematical theory of the caloric
N. D. Hari Dass
In this work, Sadi Carnot;s fundamental work is critically examined, and contrasted with modern thermodynamics. A mathematical theory of his work is given on the basis of the obser…
Does the first part of the second law also imply its second part?
N. D. Hari Dass
Sommerfeld called the first part of the second law to be the entropy axiom, which is about the existence of the state function entropy. It was usually thought that the second part…
OPERA, SN1987a and energy dependence of superluminal neutrino velocity
N. D. Hari Dass
This is a brief note discussing the energy dependence of superluminal neutrino velocities recently claimed by OPERA [1,2]. The analysis is based on the data provided there on this…
Minimum Uncertainty and Entanglement
N. D. Hari Dass, Tabish Qureshi, Aditi Sheel
We address the question, does a system A being entangled with another system B, put any constraints on the Heisenberg uncertainty relation (or the Schrodinger-Robertson inequality)…
Magnetars From Magnetized Cores Created by a Strong Interaction Phase Transition
N. D. Hari Dass, Vikram Soni
We consider a model where the strong magnetic fields of magnetars arise from a high baryon density, magnetized core. In this framework magnetars are distinguished from pulsars by t…
On string momentum in effective string theories
N. D. Hari Dass
Centre of mass momentum for strings is an important ingredient in the calculation of the spectrum of string theories. It is calculated by the Nöther prescription for two types of c…
A new form of the no-cloning theorem for harmonic oscillator coherent states
N. D. Hari Dass
We give an alternative formulation of the no-cloning theorem that applies to harmonic oscillator coherent states. It says that {\em unknown} single harmonic oscillator coherent sta…
All Conformal Effective String Theories are Isospectral to Nambu-Goto Theory
N. D. Hari Dass
It is shown that all Polchinski-Strominger effective string theories are \emph{isospectral} to Nambu-Goto theory. The relevance of these results to QCD-Strings is discussed.
Spectrum to all orders of Polchinski-Strominger Effective String Theories of the Drummond Type
N. D. Hari Dass, Yashas Bharadwaj
Drummond had proposed four actions for Polchinski-Strominger effective string theories at order , where is the length of the (closed) string >. In \cite{covariant} it…
Spectrum to all orders of Polchinski-Strominger {Effective} String Theory of Polyakov-Liouville Type
N. D. Hari Dass, Peter Matlock, Yashas Bharadwaj
The spectrum of a Polchinski-Strominger type effective string theory, extended to all orders, herein called an effective string theory of the \emph{Polyakov-Liouville Type} (for ob…
Discussion on a possible neutrino detector located in India
M. V. N. Murthy, U. A. Yajnik
We have identified some important and worthwhile physics opportunitites with a possible neutrino detector located in India. Particular emphasis is placed on the geographical advant…
On the Emergence of the Microcanonical Description from a Pure State
N. D. Hari Dass, S. Kalyana Rama, B. Sathiapalan
We study, in general terms, the process by which a pure state can ``self-thermalize'' and {\em appear} to be described by a microcanonical density matrix. This requires a quantum m…
Vacuum polarisation induced coupling between Maxwell and Kalb-Ramond Fields
N. D. Hari Dass, K. V. Shajesh
We present here a manifestly gauge invariant calculation of vacuum polarization to fermions in the presence of a constant Maxwell and a constant Kalb-Ramond field in four dimension…
Simplified Method for Trace Anomaly Calculations in d=6 and d<6
Fiorenzo Bastianelli, N. D. Hari Dass
We discuss a simplified method for computing trace anomalies in d=6 and d<6 dimensions. It is known that in the quantum mechanical approach trace anomalies in d dimensions are give…
Current Status of the Numerical Simulations of d=3 SU(2) Lattice Gauge Theory in the Dual Formulation
N. D. Hari Dass, Dong-Shin Shin
We have continued our systematic investigations of the numerical simulations of lattice gauge theories in the dual formulation. These include: i) a more practical implementation of…
Axial anomaly and Ginsparg-Wilson fermions in the Lattice Dirac Sea picture
S. Cheluvaraja, N. D. Hari Dass
The axial anomaly equation in 1+1 dimensional QED is obtained on the lattice for fermions obeying the Ginsparg-Wilson relation. We make use of the properties of the Lattice Dirac s…
Asymptotically Free Non-Abelian Gauge Theories With Fermions and Scalars As Alternatives to QCD
N. D. Hari Dass, V. Soni
In this paper we construct non-Abelian gauge theories with fermions and scalars that nevertheless possess asymptotic freedom.The scalars are taken to be in a chiral multiplet trans…
Regularisation of Chiral Gauge Theories
N. D. Hari Dass
This article gives a review of the topic of regularising chiral gauge theories and is aimed at a general audience. It begins by clarifying the meaning of chirality and goes on to d…
On Finite Size Effects in Quantum Gravity
N. D. Hari Dass
A systematic investigation is given of finite size effects in quantum gravity or equivalently the theory of dynamically triangulated random surfaces. For Ising models coupled…
Interaction of F- and D-strings in the Matrix Model
N. D. Hari Dass, B. Sathiapalan
We study a configuration of a parallel F- (fundamental) and D- string in IIB string theory by considering its T-dual configuration in the matrix model description of M-theory. We s…
Finite Size Effects for the Ising Model Coupled to 2-D Random Surfaces
N. D. Hari Dass, B. E. Hanlon, T. Yukawa
Finite size effects for the Ising Model coupled to two dimensional random surfaces are studied by exploiting the exact results from the 2-matrix models. The fixed area partition fu…