836 research outputs found
Optimization of ultrafine entanglement witnesses
The ultrafine entanglement witness, introduced in [F. Shahandeh, M.
Ringbauer, J.C. Loredo, and T.C. Ralph, Phys. Rev. Lett. \textbf{118}, 110502
(2017)], can seamlessly and easily improve any standard entanglement witness.
In this paper, by combining the constraint and the test operators, we rotate
the hyperplane determined by the test operator and improve further the original
ultrafine entanglement witness. In particular, we present a series of new
ultrafine entanglement witnesses, which not only can detect entangled states
that the original ultrafine entanglement witnesses cannot detect, but also have
the merits that the original ultrafine entanglement witnesses have.Comment: 8 page
Nonlinear Improvement of Qubit-qudit Entanglement Witnesses
The entanglement witness is an important and experimentally applicable tool
for entanglement detection. In this paper, we provide a nonlinear improvement
of any entanglement witness for quantum systems. Compared with any
existing entanglement witness, the improved separability criterion only needs
two more measurements on local observables. Detailed examples are employed to
illustrate the efficiency of the nonlinear improvement for general, optimal and
non-decomposable entanglement witnesses.Comment: 11 pages, 0 figure
Localized primary gastrointestinal diffuse large B cell lymphoma received a surgical approach: an analysis of prognostic factors and comparison of staging systems in 101 patients from a single institution
Clinical characteristics and survival rate of patients with localized PG-DLBCL. It shows the clinical characteristics and Rituximab treatment between localized PG-DLBCL patients with surgery and those with chemotherapy alone. (PDF 276 kb
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