64 citations · 263 across the 19 of their papers we have counts for
19 papers
Quantum correlations versus spin magnitude: Transition to the classical limit
M. A. Yurischev, E. I. Kuznetsova, Saeed Haddadi
Quantum-classical transitions have long attracted much attention. We study such transitions in quantum spin-(,1/2) systems at thermal equilibrium. Unlike the previous work [Phys…
Quantum correlations in general qubit-qudit axially symmetric states
Saeed Haddadi, Elena I. Kuznetsova, M. A. Yurischev
The development and improvement of analytical methods for evaluating nonclassical correlations is one of the most important tasks in quantum information science. In this paper, we…
A comparative study of LQU and LQFI in general qubit-qutrit axially symmetric states
M. A. Yurischev, Saeed Haddadi, Mehrdad Ghominejad
We derive the compact closed forms of local quantum uncertainty (LQU) and local quantum Fisher information (LQFI) for hybrid qubit-qutrit axially symmetric (AS) states. This allows…
Quantumness near a Schwarzschild black hole
S. Haddadi, M. A. Yurischev, M. Y. Abd-Rabbou +3
The merging of quantum information science with the relativity theory presents novel opportunities for understanding the enigmas surrounding the transmission of information in rela…
Local quantum Fisher information and local quantum uncertainty for general X-states
M. A. Yurischev, Saeed Haddadi
A two-spin-1/2 Heisenberg XYZ model with Dzyaloshinsky--Moriya (DM) and Kaplan--Shekhtman--Entin-Wohlman--Aharony (KSEA) interactions in the presence of an inhomogeneous external m…
Quantum Otto heat engines on XYZ spin working medium with DM and KSEA interactions: Operating modes and efficiency at maximal work output
Elena I. Kuznetsova, M. A. Yurischev, Saeed Haddadi
The magnetic Otto thermal machine based on a two-spin-1/2 XYZ working fluid in the presence of an inhomogeneous magnetic field and antisymmetric Dzyaloshinsky--Moriya (DM) and symm…
Landau-type sudden transitions of quantum correlations
Mikhail A. Yurischev
Sudden changes of quantum correlations in the Bell-diagonal states are well-known effects. They occur when the set of optimal parameters that determine the quantum correlation cons…
Quantum entanglement in the anisotropic Heisenberg model with multicomponent DM and KSEA interactions
A. V. Fedorova, M. A. Yurischev
Using group-theoretical approach we found a family of four nine-parameter quantum states for the two-spin-1/2 Heisenberg system in an external magnetic field and with multiple comp…
On the quantum correlations in two-qubit XYZ spin chains with Dzyaloshinsky-Moriya and Kaplan-Shekhtman-Entin-Wohlman-Aharony interactions
M. A. Yurischev
The anisotropic Heisenberg two-spin-1/2 model in an inhomogeneous magnetic field with both antisymmetric Dzyaloshinsky-Moriya and symmetric Kaplan-Shekhtman-Entin-Wohlman-Aharony c…
Temperature-field phase diagrams of one-way quantum work deficit in two-qubit XXZ spin systems
M. A. Yurischev
The spin-1/2 XXZ chain in a uniform magnetic field at thermal equilibrium is considered. For this model, we give a complete classification of all qualitatively different phase diag…
On the possibility to detect quantum correlation regions with the variable optimal measurement angle
Ekaterina V. Moreva, Marco Gramegna, Mikhail A. Yurischev
Quantum correlations described by quantum discord and one-way quantum deficit can contain ordinary regions with {\em constant} (i.e., universal) optimal measurement angle or $π…
Phase diagram for the one-way quantum deficit of two-qubit X states
M. A. Yurischev
The one-way quantum deficit, a measure of quantum correlation, can exhibit for X quantum states the regions (subdomains) with the phases and which are characterized…
Bimodal behavior of post-measured entropy and one-way quantum deficit for two-qubit X states
M. A. Yurischev
A method for calculating the one-way quantum deficit is developed. It involves a careful study of post-measured entropy shapes. We discovered that in some regions of X-state space…
Extremal properties of conditional entropy and quantum discord for XXZ symmetric quantum states
M. A. Yurischev
For the XXZ subclass of symmetric two-qubit X states, we study the behavior of quantum conditional entropy S_{cond} as a function of measurement angle θ\in[0,π/2]. Numerical calcul…
Experimental Exploration of Quantum Correlations: Discord versus Entanglement
E. Moreva, M. Gramegna, M. A. Yurischev +1
Quantum correlations represent a fundamental tool for studies ranging from basic science to quantum technologies. Different non-classical correlations have been identified and stud…
NMR dynamics of quantum discord for spin-carrying gas molecules in a closed nanopore
M. A. Yurischev
A local orthogonal transformation that transforms any centrosymmetric (CS) matrix of fourth order to the X form is found. A picewise-analytic-numerical formula Q=min{Q_π/2,Q_θ,Q_0}…
On the quantum discord of general X states
M. A. Yurischev
Quantum discord Q is a function of density matrix elements. The domain of such a function in the case of two-qubit system with X density matrix may consist of three subdomains at m…
Quantum discord for general X and CS states: A piecewise-analytic-numerical formula
M. A. Yurischev
Quantum discord is a function of density-matrix elements (and through them, e.~g., of temperature, applied fields, time, and so forth). The domain of such a function in the case of…
Quantum discord in spin systems with dipole-dipole interaction
E. I. Kuznetsova, M. A. Yurishchev
The behavior of total purely quantum correlation (discord) in dimers consisting of dipolar-coupled spins 1/2 is studied. We found that the discord Q=0 at the absolute zero temperat…