Fighting noise with noise in realistic quantum teleportation

TL;DR

This paper examines how various types of noise affect quantum teleportation efficiency, revealing counterintuitive scenarios where more noise can improve performance and suggesting that different noise channels can be beneficial.

Contribution

It provides a comprehensive analysis of noise effects on quantum teleportation, including novel scenarios where increased noise or varied noise types enhance protocol efficiency.

Findings

Certain noise combinations improve teleportation efficiency.

Different noise channels can be advantageous when noise is unavoidable.

More entanglement does not always correlate with higher efficiency.

Abstract

We investigate how the efficiency of the quantum teleportation protocol is affected when the qubits involved in the protocol are subjected to noise or decoherence. We study all types of noise usually encountered in real world implementations of quantum communication protocols, namely, the bit flip, phase flip (phase damping), depolarizing, and amplitude damping noise. Several realistic scenarios are studied in which a part or all of the qubits employed in the execution of the quantum teleportation protocol are subjected to the same or different types of noise. We find noise scenarios not yet known in which more noise or less entanglement lead to more efficiency. Furthermore, we show that if noise is unavoidable it is better to subject the qubits to different noise channels in order to obtain an increase in the efficiency of the protocol.