arXiv subjects

Nirman Ganguly

Publications and source records attributed to Nirman Ganguly.

38 records · Page 3Linked to original sources

arXiv2009

Witness for edge states and its characteristics

Edge states lying at the edge of PPT entangled states have a very intriguing existence and their detection is equally interesting. We present here a new witness for detection of edge states. We then compare between our proposed witness operator and the witness operator proposed in [Physical Review A, 62, 052310 (2000)] in terms of the efficiency in the detection of PPT entangled states. In this regard we show that this operator is finer than the Lewenstein et.al. operator in some restriction. We also discuss about its experimental realization via Gell-Mann matrices.

quant-ph↗

arXiv2009

Entanglement and Mixed ness of Locally Cloned Non - Maximal W - State

In this work we describe a protocol by which two of three parties generate two bipartite entangled state among themselves without involving third party, from a non maximal W state or W - type state $|X>=α|001>_{123}+β|010>_{123}+γ|100>_{123}, α^{2} + β^{2} + γ^{2} = 1$ shared by three distant partners. Also we have considered the case $β=γ$, to obtain a range for $α^2$, for which the local output states are separable and non local output states are inseparable. We also find out the dependence of the mixed ness of inseparable states with their amount of inseparability, for that range of $α^2$.

quant-ph↗