Controlled Quantum Dense Coding in a Four-particle Non-maximally Entangled State via Local Measurements

TL;DR

This paper explores a controlled quantum dense coding scheme using a four-particle non-maximal entangled state, demonstrating how local measurements and particle distribution affect information transfer.

Contribution

It introduces a method to control classical information transfer in quantum dense coding via local measurement adjustments in a four-particle non-maximal entangled state.

Findings

Classical information transfer can be controlled by measurement angles.

Distribution of particles influences dense coding capacity.

A condition for particle distribution in larger quantum channels is proposed.

Abstract

A controlled quantum dense coding scheme is investigated with a four-particle non-maximal quantum channel. The amount of classical information is shown to be capable of being controlled by the controllers through adjustments of the local measurement angles and to depend on the coefficients of the quantum channel; in addition, the four particles are distributed in two inverse ways in such an quantum channel. A restricted condition for distributing the particles to realize quantum dense coding in an arbitrary ($N+2$)-particle quantum channel is proposed.