Realizing Negative Quantum States with the IBM Quantum Hardware

TL;DR

This paper demonstrates the preparation and validation of robust entangled quantum states on IBM hardware, which outperform Bell states under non-Markovian noise, and explores their potential in quantum teleportation.

Contribution

It introduces quantum circuits for preparing non-traditional entangled states on superconducting hardware and validates their effectiveness against noise.

Findings

Validated state preparation on IBM quantum device

Entangled states outperform Bell states under non-Markovian noise

Proposed teleportation scheme using these states

Abstract

This study explores robust entangled states described using the framework of discrete Wigner functions. Notably, these states are known to outperform the Bell state in measures of entanglement in the presence of non-Markovian noise. Our study focuses on methods for preparing these states using quantum circuits that can be implemented on superconducting hardware and testing the efficacy of these methods on IBM's quantum device. We present quantum circuits for state preparation and validate them through tomographic reconstruction on the IBM \emph{ibm\_brisbane} device. We propose a teleportation scheme that leverages these entangled states as a resource. We believe that these entangled states have the potential to be used in place of the traditional Bell state in scenarios where non-Markovian errors are prevalent.