Digital quantum information processing with continuous-variable systems / Takaya Matsuura.

Format:

Book

Author/Creator:

Matsuura, Takaya, author.

Series:

Springer Theses, Recognizing Outstanding Ph.D. Research, 2190-5061

Language:

English

Subjects (All):

Quantum theory.

Physical Description:

1 online resource (172 pages)

Edition:

1st ed. 2023.

Place of Publication:

Singapore : Springer, [2023]

Summary:

The book provides theoretical methods of connecting discrete-variable quantum information processing to continuous-variable one. It covers the two major fields of quantum information processing, quantum communication and quantum computation, leading to achievement of a long-sought full security of continuous-variable quantum key distribution (QKD) and proposal of a resource-efficient method for optical quantum computing. Firstly, the book provides a security of continuous-variable QKD against arbitrary attacks under a realistic condition such as finite communication rounds and the use of digitized information processing. The book also provides the unified view for conventionally used approximate Gottesman-Kitaev-Preskill (GKP) codes, which encodes qudits on a continuous-variable system, enabling direct comparison between researches based on different approximations. The book finally proposes a resource-efficient method to realize the universal optical quantum computation using the GKP code via the direct preparation of the GKP magic state instead of GKP Pauli states. Feasibility of the proposed protocol is discussed based on the existing experimental proposals for the GKP state preparation.

Contents:

Introduction

Preliminaries

Continuous-Variable Quantum System

Quantum Key Distribution with Continuous-Variable Systems

Quantum computation with Continuous-Variable Systems.

Notes:

Description based on print version record.

Other Format:

Print version: Matsuura, Takaya Digital Quantum Information Processing with Continuous-Variable Systems

ISBN:

9789811982880