Realization of Quantum State Privacy Amplification in a Nuclear Magnetic Resonance Quantum System

TL;DR

This paper reports the experimental implementation of quantum state privacy amplification in a nuclear magnetic resonance system, demonstrating reduction of information leakage through quantum operations.

Contribution

It presents the first experimental realization of QSPA protocol in an NMR system, validating theoretical predictions with actual density matrix measurements.

Findings

Experimental density matrices match theoretical expectations

QSPA reduces quantum state information leakage effectively

Protocol successfully implemented in a nuclear magnetic resonance system

Abstract

Quantum state privacy amplification (QSPA) is the quantum analogue of classical privacy amplification. If the state information of a series of single particle states has some leakage, QSPA reduces this leakage by condensing the state information of two particles into the state of one particle. Recursive applications of the operations will eliminate the quantum state information leakage to a required minimum level. In this paper, we report the experimental implementation of a quantum state privacy amplification protocol in a nuclear magnetic resonance system. The density matrices of the states are constructed in the experiment, and the experimental results agree with theory well.