Nondestructive discrimination of a new family of highly entangled states in IBM quantum computer

TL;DR

This paper introduces a nondestructive method to discriminate highly entangled Z-states in IBM quantum computers, enabling measurement-based quantum computation without destroying the quantum states.

Contribution

It presents new quantum circuits for nondestructively discriminating Z-states, which are as entangled as cluster states, and confirms their preservation via quantum state tomography.

Findings

Successfully designed circuits for N-qubit Z-states discrimination

Confirmed state preservation after measurement using quantum state tomography

Demonstrated applicability in measurement-based quantum computation

Abstract

Measurement-based quantum computation (MQC) is a leading paradigm for building a quantum computer. Cluster states being used in this context act as one-way quantum computers. Here, we consider Z-states as a type of highly entangled states like cluster states, which can be used for one-way or measurement based quantum computation. We define Z-state basis as a set of orthonormal states which are as equally entangled as the cluster states. We design new quantum circuits to non-destructively discriminate these highly entangled Z-states. The proposed quantum circuits can be generalized for N-qubit quantum system. We confirm the preservation of Z-states after the performance of the circuit by quantum state tomography process.