Amplitude damping changes entangled pure states into usual ly less-entangled mixed states. We show, however, that even local amplitude damping of one or two qubits c an result in mixed states more… (More)

It is well known that the violation of Bell’s inequality in the form given by Clauser, Horne, Shimony, and Holt (CHSH) in two-qubit systems requires entanglement, but not vice versa, i.e., there are… (More)

Adam Miranowicz, Satoshi Ishizaka, Bohdan Horst, and Andrzej Grudka Faculty of Physics, Adam Mickiewicz University, 61-614 Poznań, Poland Institute of Theoretical Physics and Astrophysics, University… (More)

After three years of preparation, two superstructures, each made of two superconducting 7-cell weakly coupled subunits, have been installed in the TESLA Test Facility linac (TTF) for the coldand beam… (More)

Superstructures, chains of superconducting multi-cell cavities (subunits) connected by been proposed as an alternative layout for the TESLA main accelerator [1]. After three years of preparation, two… (More)

We review some counterintuitive properties of standard measures describing quantum entanglement and violation of Bell’s inequality (often referred to as “nonlocality”) in two-qubit systems. By… (More)