Quantum Inf Process (2012) 11:629–631 DOI 10.1007/s11128-011-0287-1 BOOK REVIEW Frank Gaitan: Quantum error correction and fault tolerant quantum computing Mikio Nakahara Received: 15 April 2011 / Accepted: 17 August 2011 / Published online: 27 August 2011 © Springer Science+Business Media, LLC 2011 Quantum computing makes use of a quantum system to store and process information. If a quantum system is employed for computing, one can make use of resources such as superposition states and entangled states, which do not exist in the classical world. These new resources give a quantum computer exponentially efﬁcient computational power compared to its classical counterpart. Here qubits (quantum bits) are employed instead of the bits used in classical computing. A (pure) state of a qubit is a two- dimensional complex vector represented as a superposition of two basis vectors cor- responding to classical 0 and 1. Physical realization of a quantum computer, however, suffers from several serious obstacles. Decoherence is one of the most serious obstacles among others. A quantum system employed for quantum computing has to satisfy two seemingly contradicting requirements; it must be controllable by manipulating exter- nal control parameters and interactions within the system and, at the same time, it must
Quantum Information Processing – Springer Journals
Published: Aug 27, 2011
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