Simulating quantum mechanics is known to be a difficult computational problem, especially
when dealing with large systems. However, this difficulty may be overcome by using some …

The manner in which states of some quantum systems become effectively classical is of
great significance for the foundations of quantum physics, as well as for problems of …

This concise, accessible text provides a thorough introduction to quantum computing-an
exciting emergent field at the interface of the computer, engineering, mathematical and …

Quantum computation and information is a new, rapidly developing interdisciplinary field.
Therefore, it is not easy to understand its fundamental concepts and central results without …

A quantum Fourier transform (QFT) has been implemented on a three qubit nuclear
magnetic resonance (NMR) quantum computer to extract the periodicity of an input state …

In close analogy to the fundamental role of random numbers in classical information theory,
random operators are a basic component of quantum information theory. Unfortunately, the …

Numerical simulation of quantum systems is crucial to further our understanding of natural
phenomena. Many systems of key interest and importance, in areas such as …

Out-of-time-ordered correlators (OTOCs) have been proposed as a probe of chaos in
quantum mechanics, on the basis of their short-time exponential growth found in some …

The results of quantum process tomography on a three-qubit nuclear magnetic resonance
quantum information processor are presented and shown to be consistent with a detailed …

We study the quantum entanglement caused by unitary operators that have classical limits
that can range from the near integrable to the completely chaotic. Entanglement in the …