50 citations · 136 across the 28 of their papers we have counts for
4 papers · 2 filters
An alternate model for protective measurements of two-level systems
Anirban Das, N. D. Hari Dass
In this article we propose an alternate model for the so called {\it protective measurements}, more appropriately {\it adiabatic measurements} of a spin 1/2 system where the {\it a…
Purifications Without Entanglement, State Reconstructions and Entropy
Chirag Dhara, N. D. Hari Dass
In this paper we have analysed in detail two different purification protocols. The first one, proposed by Sudarshan, is based on the preservation of probabilities.We have construct…
Purification of Single Qubits and reconstruction from Post-Measurement State
Chirag Dhara, N. D. Hari Dass
Purification of mixed states in Quantum Mechanics, by which we mean the transformation into pure states, has been viewed as an {\it Operation} in the sense of Kraus et al and expli…
A New Relation between post and pre-optimal measurement states
Chirag Dhara, N. D. Hari Dass
When an optimal measurement is made on a qubit and what we call an Unbiased Mixture of the resulting ensembles is taken, then the post measurement density matrix is shown to be rel…