Perfect state transfer on a spin-chain without state initialization

TL;DR

This paper shows that perfect quantum state transfer is possible in a spin chain using engineered interactions and local operations, without needing to initialize the medium or fine-tune controls, simplifying quantum communication.

Contribution

It introduces a method for perfect state transfer that does not require state initialization or precise control pulses, advancing quantum information transfer techniques.

Findings

Achieves perfect state transfer without medium initialization

Highlights the role of local operations in quantum communication

Provides insights into purity, entanglement, and operations in many-body systems

Abstract

We demonstrate that perfect state transfer can be achieved using an engineered spin chain and clean local end-chain operations, without requiring the initialization of the state of the medium nor fine tuning of control-pulses. This considerably relaxes the prerequisites for obtaining reliable transfer of quantum information across interacting-spin systems. Moreover, it allows us to shed light on the interplay among purity, entanglement and operations on a class of many-body systems potentially useful for quantum information processing tasks.