In a previous paper [1] an Euler angle parameterization for SU(4) was given. Here we present the derivation of a generalized Euler angle parameterization for SU(N). The formula for the calculation of… (More)

In this paper we give an explicit parametrization for all two-qubit density matrices. This is important for calculations involving entanglement and many other types of quantum information processing.… (More)

In a previous paper [1] an Euler angle parameterization for SU (N) was given. Here we present a generalized Euler angle parameterization for U (N). The formula for the calculation of the volume for U… (More)

We have analyzed and measured the quantum coherent dynamics of a circuit containing two-coupled superconducting charge qubits. Each qubit is based on a Cooper pair box connected to a reservoir… (More)

The possibility of constructing a complete, continuous Wigner function for any quantum system has been a subject of investigation for over 50 years. A key system that has served to illustrate the… (More)

Eco-safe driving is a driving style that tries to minimize vehicle emissions and ensure the drivers' safety. It is an important contribution to reducing greenhouse gas emissions of transport.… (More)

YU. A. PASHKIN, T. TILMA, D. V. AVERIN, O. ASTAFIEV, T. YAMAMOTO, Y. NAKAMURA, F. NORI and J. S. TSAI The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako, Saitama 305-0198,… (More)

In quantum mechanics, sets of density matrices are important for numerous reasons. For example, their compact notation make them useful for describing decoherence and entanglement properties of… (More)