Multipartite entangled magnon states as quantum communication channels |
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Authors: | E Sriram Prasath Sreraman Muralidharan Chiranjib Mitra Prasanta K Panigrahi |
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Affiliation: | (2) IBM Research, Yorktown Heights, NY, USA |
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Abstract: | We investigate the entanglement properties of the two magnon states and explicate conditions under which, the two magnon state
becomes useful for several quantum communication protocols. We systematically study the temporal behaviour of concurrence
to find out the effect of exchange interaction on entanglement. The two magnon state, which is potentially realizable in quantum
dots using Heisenberg exchange interaction, is found to be suitable for carrying out deterministic teleportation of an arbitrary
two qubit composite system. Further, conditions for which the channel capacity reaches “Holevo bound”, allowing four classical
bits to be transmitted through two qubits are derived. Later, an unconventional protocol is given to demonstrate that this
state can be used for sharing of a two qubit entangled state among two parties. |
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