4 papers
quant-ph2003
Probabilistic cloning and signalling
Sibasish Ghosh, Guruprasad Kar, Samir Kunkri +1
We give a proof of impossibility of probabilistic exact cloning of any three different states of a qubit. The simplicity of the proof is due to the use of a surprising res…
quant-ph2000
Entanglement vs. Noncommutativity in Teleportation
Sibasish Ghosh, Guruprasad Kar, Anirban Roy +1
We provide an alternative simple proof of the necessity of entanglement in quantum teleportation by using the no-disentanglement theorem. We show that this is true even when the st…
quant-ph2000
Parallel and Anti-Parallel Spins: More Differences
Sibasish Ghosh, Anirban Roy, Ujjwal Sen
The authors have withdrawn this paper.
quant-ph1999
Classification of Maximally Entangled States of Spin-1/2 Particles
S. Ghosh, G. Kar, A. Roy
This paper has been withdrawn temporarily.