In this first comprehensive introduction to the main ideas and techniques of quantum computation and information, michael nielsen and isaac chuang ask the question: what are the ultimate physical limits to computation an...In this first comprehensive introduction to the main ideas and techniques of quantum computation and information, michael nielsen and isaac chuang ask the question: what are the ultimate physical limits to computation and communication? They detail such remarkable effects as fast quantum algorithms, quantum teleportation, quantum cryptography and quantum error correction.