# Dual Quantum Zeno Superdense Coding

## TL;DR

This paper introduces a superdense coding protocol utilizing a dual quantum Zeno gate, enabling efficient Bell-state analysis and high throughput in quantum communication.

## Contribution

It develops a novel superdense coding scheme using DQZ gates for complete Bell-state analysis, enhancing quantum communication efficiency.

## Key findings

- Achieves distinguishability of Bell states semi-counterfactually.
- Demonstrates high throughput efficiency with increasing cycle numbers.
- Enables remote Bell-state analysis using DQZ gates.

## Abstract

Quantum superdense coding enables a sender to encode a two-bit classical message in one qubit using the preshared entanglement. In this paper, we develop a superdense coding protocol using a dual quantum Zeno (DQZ) gate to take the full advantage of quantum superdense coding from the complete Bell-state analysis. We verify that the DQZ gate allows remote parties to achieve the distinguishability of orthonormal Bell states in a semi-counterfactual manner and the DQZ superdense coding achieves high throughput efficiency as a function of cycle numbers for the Bell-state analyzer.