Unambiguous modification of nonorthogonal single and two photon polarization states

TL;DR

This paper introduces a probabilistic method for unambiguously modifying non-orthogonal quantum states, demonstrated experimentally with two-photon polarization states, enabling precise control over entanglement levels.

Contribution

It presents a novel probabilistic protocol for unambiguous modification of non-orthogonal quantum states, experimentally implemented using two-photon polarization states.

Findings

Successful experimental implementation of the protocol.

Ability to control entanglement in initial states.

Potential applications in quantum information processing.

Abstract

In this work we propose a probabilistic method which allows an unambiguous modification of two non-orthogonal quantum states. We experimentally implement this protocol by using two-photon polarization states generated in the process of spontaneous parametric down conversion. In the experiment, for codifying initial quantum states, we consider single photon states and heralded detection. We show that the application of this protocol to entangled states, it allows a fine control of the amount of entanglement of the initial state.