Parallel multi-two-qubit SWAP gate via QND interaction of OAM light and atomic ensemble

TL;DR

This paper proposes a method for implementing a parallel multi-two-qubit SWAP gate using quantum non-demolition interactions between an atomic ensemble and multimode light with orbital angular momentum, advancing quantum computing capabilities.

Contribution

It introduces a novel scheme for parallel multi-qubit SWAP gates based on QND interactions with OAM light and atomic ensembles, enabling scalable quantum operations.

Findings

Demonstrates the feasibility of a parallel multi-two-qubit SWAP gate.

Provides a detailed procedure for revealing two-qubit subsystems.

Shows potential for practical implementation in quantum information processing.

Abstract

Nowadays quantum SWAP gate has become an integral part of quantum computing, so investigation of methods of its realization seems to be an important practical problem for various quantum-optical and information applications. In the present paper we propose a scheme for performing a SWAP logic operation in discrete variables in the framework of quantum non-demolition interaction between an atomic ensemble and a multimode light with orbital angular momentum. We discuss in detail the procedure for revealing two-qubit closed subsystems on a set of atomic and field states for different values of the driving field orbital momentum. We also demonstrate the possibility of implementing a parallel multi-two-qubit quantum SWAP gate.