# Noiseless signal shaping and cluster state generation with quantum memory cell

## TL;DR

This paper presents a method to generate cluster states using multimode radiation from a SPOPO and quantum memory, enabling noiseless signal shaping and efficient quantum state transfer.

## Contribution

It introduces a scheme for selective supermode writing and readout in a quantum memory, facilitating cluster state creation with minimal noise.

## Key findings

- Successful creation of a four-mode linear cluster state
- Demonstration of noiseless signal shaping via quantum memory
- Effective selective writing of a single supermode from multimode radiation

## Abstract

In this article, we employ multimode radiation of a synchronously pumped optical parametric oscillator (SPOPO) to build a cluster state through a conversion on the base of quantum memory cell. We demonstrate that by choosing an appropriate driving field we can ensure the effective writing of the only one supermode from the entire set of the SPOPO squeezed supermodes. Further, by changing the driving field profile at the readout, we convert the time profile of the retrieved signal while maintaining its quantum state. We demonstrate the possibilities of using the presented scheme by the example of creating a four-mode linear cluster state of light.