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United Nation (UN) security council has fifteen members, out of which fivepermanent members of the council can use their veto power against anyunfavorable decision taken by the council. In certain situation, a member usingright to veto may prefer to remain anonymous. This need leads to therequirement of the protocols for anonymous veto which can be viewed as aspecial type of voting. Recently, a few protocols for quantum anonymous vetohave been designed which clearly show quantum advantages in ensuring anonymityof the veto. However, none of the efficient protocols for quantum anonymousveto have yet been experimentally realized. Here, we implement 2 of thoseprotocols for quantum anonymous veto using an IBM quantum computer named IBMQCasablanca and different quantum resources like Bell, GHZ and cluster states.In this set of proof-of-principle experiments, it's observed that using thepresent technology, a protocol for quantum anonymous veto can be realizedexperimentally if the number of people who can veto remains small as in thecase of UN council. Further, it's observed that Bell state based protocolimplemented here performs better than the GHZ/cluster state basedimplementation of the other protocol in an ideal scenario as well as inpresence of different types of noise (amplitude damping, phase damping,depolarizing and bit-flip noise). In addition, it's observed that based ondiminishing impact on fidelity, different noise models studied here can beordered in ascending order as phase damping, amplitude damping, depolarizing,bit-flip.

United Nation Security Council in Quantum World: Experimental Realization of Quantum Anonymous Veto Protocols using IBM Quantum Computer