Quantum secure data transfer with pulse shape encoded optical qubits

TL;DR

This paper introduces a quantum secure data transfer scheme using pulse shape encoded optical qubits, leveraging trapped atoms and QSDC protocol to ensure high fidelity and immunity to attacks.

Contribution

It presents a novel pulse shape encoding method for optical qubits in quantum secure communication, enhancing fidelity and security against individual attacks.

Findings

High-fidelity pulse shape encoding achieved via controlled driving pulses.

Arbitrary photon absorption probability demonstrated with optimized driving pulses.

Data transfer protocol proven immune to individual quantum attacks.

Abstract

Quantum secure data transfer is an important topic for quantum cyber security. We propose a scheme to realize quantum secure data transfer in the basis of quantum secure direct communication (QSDC). In this proposal, the transmitted data is encoded in the pulse shape of a single optical qubit, which is emitted from a trapped atom owned by the sender and received by the receiver with another trapped atom. The encoding process can be implemented with high fidelity by controlling the time-dependent driving pulse on the trapped atom to manipulate the Rabi frequency in accordance with the target pulse shape of the emitted photons. In the receiving process, we prove that, the single photon can be absorbed with arbitrary probability by selecting appropriate driving pulse. We also show that, based on the QSDC protocol, the data transfer process is immune to the individual attacks.