Deterministic generation of arbitrary symmetric states and entanglement classes

TL;DR

This paper presents a deterministic method for generating any symmetric N-qubit state and its entanglement class using quantum optics systems, leveraging unitary gates and a bosonic quantum bus.

Contribution

It introduces a novel, deterministic approach to produce arbitrary symmetric states of qubits, applicable to systems like trapped ions and superconducting circuits.

Findings

Method enables deterministic state generation within coherence time

Applicable to quantum optics systems such as trapped ions and superconducting circuits

Uses a sequence of selective unitary gates for state creation

Abstract

We propose a method to generate arbitrary symmetric states of N qubits, which can be easily associated with their entanglement classes. It is particularly suited to quantum optics systems like trapped ions or superconducting circuits. We encode each qubit in two metastable levels of the system and use a bosonic quantum bus for creating the states. The method is deterministic and relies on a sequence of selective unitary gates upon the qubits within the system coherence time.