Browsing by Author "Erol, V."

Now showing 1 - 3 of 3

Citation Count: 6
A Comparative Study of Concurrence and Negativity of General Three-Level Quantum Systems of Two Particles
(Amer inst Physics, 2015) Erol, V.
Quantum entanglement is at the heart of quantum information processing. Ordering the quantum systems due to their entanglement is a popular problem of the field. For two level (qubit) systems of two particles, state ordering has been studied with respect to well-known entanglement measures such as Concurrence, Negativity and Relative Entropy of Entanglement (REE) [1-5]. In this work, we study the state ordering of the three-level quantum systems of two particles with respect to Concurrence and Negativity. In particular, constructing 10K random states and calculating their Concurrences and Negativities, we obtain the orderings of the states and present our results which are interesting when compared to that of two-level systems.
Citation Count: 18
Quantum Fisher Information of Bipartitions of W States
(Polish Acad Sciences inst Physics, 2015) Ozaydin, F.; Altintas, A. A.; Yesilyurt, C.; Bugu, S.; Erol, V.
We study the quantum Fisher information (QFI) of W states and W-like states under decoherence. In particular, we find that on the contrary to amplitude damping and depolarizing decoherence, a W-like state of 3 qubits obtained by discarding 1 qubit of a genuine W state of 4 qubits is more robust than a genuine W state of 3 qubits under amplitude amplifying and phase damping decoherence.
Citation Count: 2
The Relation Between Majorization Theory and Quantum Information from Entanglement Monotones Perspective
(Amer inst Physics, 2016) Erol, V.
Entanglement has been studied extensively for understanding the mysteries of nonclassical correlations between quantum systems. In the bipartite case, there are well known monotones for quantifying entanglement such as concurrence, relative entropy of entanglement (REE) and negativity, which cannot be increased via local operations. The study on these monotones has been a hot topic in quantum information [1-7] in order to understand the role of entanglement in this discipline. It can be observed that from any arbitrary quantum pure state a mixed state can obtained. A natural generalization of this observation would be to consider local operations classical communication (LOCC) transformations between general pure states of two parties. Although this question is a little more difficult, a complete solution has been developed using the mathematical framework of the majorization theory [8]. In this work, we analyze the relation between entanglement monotones concurrence and negativity with respect to majorization for general two-level quantum systems of two particles.