6 papers
Brownian Motion in a Classical Ideal Gas: a Microscopic Approach to Langevin's Equation
Rangan Lahiri, Arvind, Anirban Sain
We present an insightful ``derivation'' of the Langevin equation and the fluctuation dissipation theorem in the specific context of a heavier particle moving through an ideal gas o…
Quantum Computing by Two-Dimensional NMR using Spin- and Transition-Selective Pulses
T. S. Mahesh, Kavita Dorai, Arvind +1
Quantum computing using two-dimensional NMR has recently been described using scalar coupling evolution technique [J. Chem. Phys.,109,10603 (1998)]. In the present paper, we descri…
A two-qubit algorithm involving quantum entanglement
Arvind, N. Mukunda
The phenomenon of quantum entanglement is fundamental to the implementation of quantum computation, and requires at least two qubits for its demonstration. However, both Deutsch al…
General radiation states and Bell's inequalities
Arvind, N. Mukunda
The connection between quantum optical nonclassicality and the violation of Bell's inequalities is explored. Bell type inequalities for the electromagnetic field are formulated for…
Necessary and Sufficient Classicality Conditions on Photon Number Distributions
R. Simon, Mary Selvadoray, Arvind +1
We exploit results on the classical Stieltjes moment problem to obtain completely explicit necessary and sufficient conditions for the photon number distribution p(n) of a radiatio…
Nonclassicality and the concept of local constraints on the photon number distribution
R. Simon, Mary Selvadoray, Arvind +1
We exploit results from the classical Stieltjes moment problem to bring out the totality of all the information regarding phase insensitive nonclassicality of a state as captured b…