Hasil untuk "cond-mat.other"

T. Leutzinger, Zachary M. Gillen, A. Miramonti et al.

M. Yurischev

For the XXZ subclass of symmetric two-qubit X states, we study the behavior of quantum conditional entropy $$S_{cond}$$Scond as a function of measurement angle $$\theta \in [0,\pi /2]$$θ∈[0,π/2]. Numerical calculations show that the function $$S_{cond}(\theta )$$Scond(θ) for X states can have at most one local extremum in the open interval from zero to $$\pi /2$$π/2 (unimodality property). If the extremum is a minimum, the quantum discord displays region with variable (state-dependent) optimal measurement angle $$\theta ^*$$θ∗. Such $$\theta $$θ-regions (phases, fractions) are very tiny in the space of X-state parameters. We also discover the cases when the conditional entropy has a local maximum inside the interval $$(0,\pi /2)$$(0,π/2). It is remarkable that the maxima exist in surprisingly wide regions, and the boundaries for such regions are defined by the same bifurcation conditions as for those with a minimum.

E. Opdecam, P. Everaert

P. Comfort, R. Udall, Paul A. Jones

O. Turki, A. Chaouachi, E. Drinkwater et al.

R. Haj-Sassi, W. Dardouri, Z. Gharbi et al.

T. Gee, P. Olsen, Nicolas J A Berger et al.

R. A. Medeiros, R. Rocha‐Filho, O. Fatibello‐Filho

P. Shughrue, P. Scrimo, I. Merchenthaler

Elizabeth E. Linder, J. Prins, Nathan M. Murata et al.

W. Brechue, J. Mayhew, F. C. Piper

J. Krieger

T. Hazell, K. Kenno, J. Jakobi

Christos, K., Argus et al.

J. Knapik, William Rieger, F. Palkoska et al.

T. Gabbett

John I. Baker, R. Hites

M. Wright, R. Hoskisson, Lowell W. Busenitz

M. Lebold, K. McClintic, Robert Campbell et al.

S. Verbanck, D. Schuermans, M. Meysman et al.