Title:	Beyond the Goldenberg-Vaidman protocol : Secure and efficient quantum communication using arbitrary, orthogonal, multi-particle quantum states
Authors:	Shukla, Chitra Pathak, A. Srikanth, R.
Keywords:	QKD QSDC DSQC
Issue Date:	Dec-2012
Publisher:	World Scientific Publishing
Citation:	International Journal of Quantum Information, 2012, Vol. 10, p1241009
Abstract:	It is shown that maximally efficient protocols for secure direct quantum communications can be constructed using any arbitrary orthogonal basis. This establishes that no set of quantum states (e.g. GHZ states, W states, Brown states or Cluster states) has an advantage over the others, barring the relative difficulty in physical implementation. The work provides a wide choice of states for experimental realization of direct secure quantum communication protocols. We have also shown that this protocol can be generalized to a completely orthogonal-state-based protocol of Goldenberg–Vaidman (GV) type. The security of these protocols essentially arises from duality and monogamy of entanglement. This stands in contrast to protocols that employ nonorthogonal states, like Bennett–Brassard 1984 (BB84), where the security essentially comes from noncommutativity in the observable algebra.
Description:	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI:	http://hdl.handle.net/2289/5662
ISSN:	0219-7499 1793-6918 (Online)
Alternative Location:	http://arxiv.org/abs/1210.2583 http://dx.doi.org/10.1142/S0219749912410092
Copyright:	2012 World Scientific Publishing Company
Appears in Collections:	Research Papers (TP)

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