considering generalized concurrence as the criterion of entanglement, we study entanglement properties of superposition of two qutrit coherent states, as a function of their amplitudes. these states may attain maximum entanglement or no entanglement at all, depending on the choice of the parameters involved. the states revealing maximum entanglement also display the maximum violations of the be...

We examine the phenomenon of entanglement sudden death (ESD) for (2 × 3)dimensional systems. As for 2× 2 systems, the negativity vanishes in finite time for some entangled pure as well as mixed states. While locally equivalent pure states do so asymptotically. Interference between the decay of the two upper levels to the lowest one in the qutrit adds further richness to ESD in this systems.

KU ScholarWorks is a service provided by the KU Libraries’ Office of Scholarly Communication & Copyright. This is the published version of the article, made available with the permission of the publisher. The original published version can be found at the link below. Han, Siyuan. (2013). Generating entanglement between microwave photons and qubits in multiple cavities coupled by a superconducti...

Understanding quantum channels and the strange behavior of their capacities is a key objective information theory. Here we study remarkably simple, low-dimensional, single-parameter family with exotic information-theoretic features. As simplest example from this family, focus on qutrit-to-qutrit channel that intuitively obtained by hybridizing together simple degradable completely useless qubit...

We investigate the effects of nonlinear couplings and external magnetic field on the thermal entanglement in a two-spin-qutrit system by applying the concept of negativity. It is found that the nonlinear couplings favor the thermal entanglement creating. Only when the nonlinear couplings |K| are larger than a certain critical value does the entanglement exist. The dependence of the thermal enta...

Geometric intuition is a crucial tool to obtain deeper insight into many concepts of physics. A paradigmatic example its power the Bloch ball, geometrical representation for state space simplest possible quantum system, two-level system (or qubit). However, already three-level (qutrit) has eight dimensions, so that complexity exceeds grasp our three-dimensional experience. This unfortunate, giv...