Qumode transfer between continuous and discrete variable devices

TL;DR

This paper introduces resource-efficient methods and measurement-based protocols for transferring quantum information between continuous-variable and discrete-variable quantum devices, enhancing integration in quantum technologies.

Contribution

It presents novel protocols for CV-DV quantum state transfer, improving success probability with ancillary qubits and enabling better integration of quantum hardware types.

Findings

Protocols achieve near-deterministic transfer success

Resource-efficient encoding and gate implementation methods

Enhanced transfer success with ancillary qubits

Abstract

Transferring quantum information between different types of quantum hardware is crucial for integrated quantum technology. In particular, converting information between continuous-variable (CV) and discrete-variable (DV) devices enables many applications in quantum networking, quantum sensing, quantum machine learning, and quantum computing. This paper addresses the transfer of CV-encoded information between CV and DV devices. We present a resource-efficient method for encoding CV states and implementing CV gates on DV devices, as well as two measurement-based protocols for transferring CV states between CV and DV devices. The success probability of the transfer protocols depends on the measurement outcome and can be increased to near-deterministic values by adding ancillary qubits to the DV devices.