Entanglement and the geometry of two qubits

Entanglement and the geometry of two qubits

We review entanglement in the context of two qubits. Equivalence under appropriate local operations leads to a representation of the notions of entangled and separable states and entanglement witnesses geometrically in 3 dimensions. The corresponding four dimensional description captures, in addition, the entanglement measure and en-tanglement distillation geometrically. We give a neat formula ...

Entanglement Witness and Geometry of Qubits

a case study of the two translators of the holy quran: tahereh saffarzadeh and laleh bakhtiar

بطورکلی، کتاب های مقدسی همچون قران کریم را خوانندگان میتوان مطابق با پیش زمینه های مختلفی که درند درک کنند. محقق تلاش کرده نقش پیش زمینه اجتماعی-فرهنگی را روی ایدئولوژی های مترجمین زن و در نتیجه تاثیراتش را روی خواندن و ترجمه آیات قرآن کریم بررسی کند و ببیند که آیا تفاوت های واژگانی عمده ای میان این مترجمین وجود دارد یا نه. به این منظور، ترجمه 24 آیه از آیات قرآن کریم مورد بررسی مقایسه ای قرار ...

Entanglement of Bell Mixtures of Two Qubits

This paper is an appendix to a previous paper: quant-ph/0101123 “Relaxation Method for Calculating Quantum Entanglement”, by Robert Tucci. For certain mixtures of Bell basis states, namely the Werner States, we use the theoretical machinery of our previous paper to derive algebraic formulas for: the pure and mixed minimization entanglements (i.e., Epure and Emixed), their optimal decompositions...

Degree of entanglement for two qubits

We demonstrate that any pure bipartite state of two qubits may be decomposed into a superposition of a maximally entangled state and an orthogonal factorizable one. Although there are many such decompositions, the weights of the two superposed states are, remarkably, unique. We propose a measure of entanglement based on this decomposition. We also demonstrate that this measure is connected to t...