In this work we describe a protocol by which one can secretly broadcast W-type state among three distant partners. This work is interesting in the sense that we introduce a new kind of local cloning operation to generate two W- type states between th
ese partners from a W-type state initially shared by them.
In this work we investigate the problem of secretly broadcasting five qubit entangled state between three different partners We implement the protocol described in ref [16] on three particle W-state shared by three distant partners Alice,Bob and Char
lie. The problem is interesting in the sense it is the first attempt to broadcast five qubit entangled state between three parties.
It is known that if one could clone an arbitrary quantum state one could send signal faster than the speed of light. However it remains interesting to see that if one can perfectly self replicate an arbitrary quantum state, does it violate the no sig
nalling principle? Here we see that perfect self replication would also lead to superluminal signalling.
