Decoherence In Adiabatic Quantum Computation, Teleportation-Based Realization Of An Optical Quantum Two-Qubit Entangling Gate, Cluster States And One-Way Quantum Computation, Optimization Of Networks For Measurement-Based Quantum Computation, Wigner Funct

Abstract

Properties of systems near quantum critical points (QCPs) have been studied extensively. A QCP is a point across which the symmetry of (e) the ground state of a quantum system changes (e&eb) in a fundamental way; such a point can be accessed by (e) changing some parameter, say λ, in the Hamiltonian governing the system. The change in the ground state across a QCP is mediated by (e&eb) quantum fluctuations. Unlike conventional thermal critical points, thermal fluctuations do not (e) play a crucial role in such transitions............

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