Experimental Demonstration of Non-Destructive Discrimination of
  Arbitrary Set of Orthogonal Quantum States Using 5-qubit IBM Quantum Computer
  on Cloud
A protocol for non-destructive descrimination of arbitrary set of orthogonal
quantum states was proposed by V. S. Manu et al., using an algorithm based on
quantum phase estimation. IBM Corporation has released a superconductivity
based 5-qubit (5-qubit transmon bowtie chip 3 and IBM 5-qubit real processor)
quantum computer named Quantum Experience and placed it on cloud. In this paper
we take advantage of the online availability of those real quantum
processors(ibmqx2 amd ibmqx4) and carry out the above protocol that has
experimentally demonstrated earlier using NMR quantum processor. Here, we set
up experiments for arbitrary one-qubit and two-qubit orthogonal quantum states.
The experiment confirmed that the arbitrary orthogonal quantum states can be
discriminate in a nondestructive manner with a high fidelity. We compare the
outcomes of those experiments which are done by ibmqx2 and ibmqx4 processors.
Here, we also show the state tomography for the single qubit experiments.
Ayan Majumder Anil Kumar