Large-scale quantum computers are hard to construct because quantum systems easily lose
their coherence through interaction with the environment. Researchers have tried to avoid …

Recent progress in quantum information has led to the start of several large national and
industrial efforts to build a quantum computer. Researchers are now working to overcome …

The answer that the quantum computing community currently gives to this question is a
cheerful" yes". The so-called" threshold" theorem says that, once the error rate per qubit per …

I assess the potential of quantum computation. Broad and important applications must be
found to justify construction of a quantum computer; I review some of the known quantum …

Practical realization of quantum computers will require overcoming decoherence and
operational errors, which lead to problems that are more severe than in classical …

Quantum error correction (QEC) and fault-tolerant quantum computation represent one of
the most vital theoretical aspects of quantum information processing. It was well known from …

In certain approaches to quantum computing the operations between qubits are
nondeterministic and likely to fail. For example, a distributed quantum processor would …

How important is fast measurement for fault-tolerant quantum computation? Using a
combination of existing and new ideas, we argue that measurement times as long as even …

Quantum computing—the processing of information according to the fundamental laws of
physics—offers a means to solve efficiently a small but significant set of classically …

We formulate a scheme for fault-tolerant quantum computation that works effectively against
highly biased noise, where dephasing is far stronger than all other types of noise. In our …