Quantum information and computation is a rapidly expanding and cross-disciplinary subject. This book gives a self-contained introduction to the field for physicists, mathematicians and computer scientists who want to know more about this exciting subject. After a step-by-step introduction to the quantum bit (qubit) and its main properties, the author presents the necessary background in quantum mechanics. The core of the subject, quantum computation, is illustrated by a detailed treatment of three quantum algorithms: Deutsch, Grover and Shor. The final chapters are devoted to the physical implementation of quantum computers, including the most recent aspects, such as superconducting qubits and quantum dots, and to a short account of quantum information. Written at a level suitable for undergraduates in physical sciences, no previous knowledge of quantum mechanics is assumed, and only elementary notions of physics are required. The book includes many short exercises, with solutions available to instructors through solutions@cambridge.org.

量子信息和计算是一个迅速扩展的跨学科课题。本书为想进一步了解这一激动人心的主题的物理学家、数学家和计算机科学家提供了该领域的独立介绍。在逐步介绍了量子比特（qubit）及其主要特性后，作者介绍了必要的量子力学背景。该主题的核心是量子计算，通过对三种量子算法的详细处理来说明。Deutsch, Grover 和 Shor。最后几章专门讨论了量子计算机的物理实现，包括最新的方面，如超导量子比特和量子点，以及对量子信息的简短叙述。本书的写作水平适合于物理科学专业的本科生，不假定以前有量子力学的知识，只要求有基本的物理学概念。该书包括许多简短的练习，其解决方案可通过solutions@cambridge.org，供教师使用。