Work

Channel purification via continuous-variable quantum teleportation with Gaussian postselection

Year: 2016

Type: article

Abstract: We present a protocol based on continuous-variable quantum teleportation and Gaussian postselection that can be used to correct errors introduced by a lossy channel. We first show that the global transformation enacted by the protocol is equivalent to an effective system composed of a noiseless amplification (or attenuation), and an effective quantum channel, which can in theory have no loss and an amount of thermal noise arbitrarily small, hence tending to an identity channel. An application of our protocol is the probabilistic purification of quantum non-Gaussian states using only Gaussian operations.

Source: Physical Review A

DOI: 10.1103/physreva.93.012326

Authors: Rémi Blandino, Nathan Walk, Austin P. Lund, Timothy C. Ralph

Institutions: The University of Queensland, Centre for Quantum Computation and Communication Technology

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

Funders: Engineering and Physical Sciences Research Council, Australian Research Council

Awards: G2533383055, G8960705998