Quantum Entanglement Capacity Gains

---
name: quantum-entanglement-capacity-gains
description: Quantum entanglement assistance for exponential capacity gains in classical multiple access channels with causal CSIT
category: quantum
---

# Quantum Entanglement Capacity Gains

## Methodology
Quantum entanglement assistance provides multiplicative capacity advantages in classical communication networks with causal channel state information at transmitters.

## Key Insights
1. **Exponential scaling**: Capacity advantage grows exponentially with number of users K for classical K-user multiple access channels
2. **Unbounded gains**: Advantage is unbounded as state alphabet size grows (with K=3 fixed, binary input/output)
3. **Substantial practical gains**: Factors exceeding 21x (K=5) and 88x (K=7) with binary alphabets
4. **Robust to noise**: Exponential advantage persists even with 30% depolarization per entangled qubit
5. **Transmitter-only**: Gains from entanglement provided only to transmitters

## Application Scenarios
- Multi-user communication systems
- Network coding with quantum resources
- Information theory capacity analysis

## Activation
Shannon capacity, entanglement assistance, multiple access channel, CSIT, capacity gain, information theory