Tomography scheme for 2-Qubit states using Ibm 7-Qubit open access quantum Processor Ibmq_Nairobi

It is well-known that entangled particles have stronger correlations than what is permissible in classical scenario. Entanglement is exploited in the field of quantum computation and quantum technologies. In this era of Noisy Intermediate-Scale Quantum (NISQ) machines one is concerned with tackling quantum noise in order to establish their advantage overclassical digital computers. Here we study the performance of IBM open access 7-qubit quantum processor ibmq_nairobifor Bell state tomography. We adapt a tomography scheme consisting of 7 measurement operations on the qubits q0, q1 and reconstruct Bell states. We find that there is a marked improvement in our figure-of-merit quantum fidelity, after error-mitigation methods are employed.