Experimental Implementation of Projective Measurement in Bell Basis

TL;DR

This paper presents an experimental method for directly projecting quantum states onto Bell basis states using an average Hamiltonian approach, demonstrated with dipolar-coupled nuclear spins.

Contribution

It introduces a novel scheme for Bell basis projection based on average Hamiltonian construction and experimental validation with nuclear spins.

Findings

Successful projection of quantum states onto Bell states.

Experimental demonstration with dipolar-coupled nuclear spins.

Method shows potential for quantum information processing.

Abstract

A scheme for direct projection of a quantum state on Bell states is described. The method is based on constructing an average Hamiltonian with Bell eigenstates and then, projecting the state on these eigenstates. The projection is performed by adding the results of a direct and time-reversed evolution. Experimental demonstration is shown for pairs of dipolar-coupled nuclear spins.