Storing Small Photonic Cluster States in a Dephasing Environment

TL;DR

This paper investigates how dephasing affects small photonic cluster states during storage and proposes local rotations to minimize entanglement loss, aiding the construction of larger photonic cluster states.

Contribution

It introduces a method to optimize local qubit rotations to preserve entanglement in photonic cluster states under dephasing during storage.

Findings

Local rotations can significantly reduce entanglement loss due to dephasing.

Optimal rotation strategies depend on the dephasing strength.

Preservation of entanglement enhances the feasibility of scalable photonic quantum computing.

Abstract

We consider the effects of decoherence on the entanglement of photonic cluster states. Large photonic cluster states can be built by fusing together smaller photonic cluster states via probabilistic fusion operations. For this construction process it is necessary to store these smaller cluster states in some way so as to have them available for attempted fusion operations. While in storage the photonic cluster states may undergo dephasing. The effects of dephasing on small, primitive cluster states is explored here with the aim of determining how to locally rotate the qubits of the cluster state so as to lose the least amount of entanglement due to the dephasing process.