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Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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22 papers · 2 filters
Deformed entropy and information relations for composite and noncomposite systems
Vladimir N. Chernega, Olga V. Man'ko, Vladimir I. Man'ko
The notion of conditional entropy is extended to noncomposite systems. The q-deformed entropic inequalities, which usually are associated with correlations of the subsystem degrees…
Multilevel superconducting circuits as two-qubit systems: Operations, state preparation, and entropic inequalities
E. O. Kiktenko, A. K. Fedorov, O. V. Man'ko +1
We theoretically study operations with a four-level superconducting circuit as a two-qubit system. Using a mapping on a two-qubit system, we show how to implement iSWAP gates and H…
Entropic and information inequality for nonlinearly transformed two-qubit X-states
V. I. Man'ko, R. S. Puzko
The entropic and information inequalities for two qubit X-states transformed by the nonlinear channels are given in explicit form. The subadditivity condition and nonnegativity of…
Deformed entropic and information inequalities for X - states of two-qubit and single qudit states
V. I. Man'ko, L. A Markovich
The q-deformed entropies of quantum and classical systems are discussed. Standard and q-deformed entropic inequalities for X - states of the two-qubit and a state of single qudit w…
PPT-inducing, distillation-prohibiting, and entanglement-binding quantum channels
Sergey N. Filippov
Entanglement degradation in open quantum systems is reviewed in the Choi-Jamiołkowski representation of linear maps. In addition to physical processes of entanglement dissociation…
Tomographic discord for a system of two coupled nanoelectric circuits
A. K. Fedorov, E. O. Kiktenko, O. V. Man'ko +1
We consider quantum correlations and quantum discord phenomena for two-qubit states with -type density matrices in the tomographic framework of quantum mechanics. By introducing…
New Minkowski type inequalities and entropic inequalities for quantum states of qudits
V. I. Man'ko, L. A. Markovich
The two-parameter Minkowski like inequality written for composite quantum system state is obtained for arbitrary Hermitian nonnegative matrix with trace equal to unity. The inequal…
Gravitational resonance spectroscopy with an oscillating magnetic field gradient in the GRANIT flow through arrangement
G. Pignol, S. Baessler, V. V. Nesvizhevsky +3
Gravitational resonance spectroscopy consists in measuring the energy spectrum of bouncing ultracold neutrons above a mirror by inducing resonant transitions between different disc…
Entropy-energy inequalities for qudit states
Armando Figueroa, Julio López, Octavio Castaños +3
We establish a procedure to find the extremal density matrices for any finite Hamiltonian of a qudit system. These extremal density matrices provide an approximate description of t…
New inequality for density matrices of single qudit states
V. N. Chernega, O. V. Man'ko, V. I. Man'ko
Using the monotonity of relative entropy of composite quantum systems we obtain new entropic inequalities for arbitrary density matrices of single qudit states. Example of qutrit s…
Separability and entanglement of spin particle
V. I. Man'ko, L. A. Markovich
We define the separability and entanglement notion for particle with spin . We consider two cases. In the first the particle is composed of two fermions with and $s_…
Minkovskii-type inequality for arbitrary density matrix of composite and noncomposite systems
V. N. Chernega, O. V. Man'ko, V. I. Man'ko
New kind of matrix inequality known for bipartite system density matrix is obtained for arbitrary density matrix of composite or noncomposite qudit systems including the single qud…
Entanglement of two-qubit photon beam by magnetic field
A. D. Levin, D. M. Gitman, R. C. Castro
We have studied the possibility of affecting the entanglement measure of 2-qubit system consisting of two photons with different fixed frequencies but with two arbitrary linear pol…
Density matrix form of Gross-Pitaevskii equation
V. N. Chernega, O. V. Man'ko, V. I. Man'ko
We consider the generalized pure state density matrix which depends on different time moments. The evolution equation for this density matrix is obtained in case where the density…
Separability and entanglement of the qudit X-state with j = 3/2
V. I. Man'ko, L. A. Markovich
The qudit state for j = 3=2 with density matrix of the form corresponding to X-state of two-qubits is studied from the point of view of entanglement and separability properties. Th…
New inequalities for quantum von Neumann and tomographic mutual information
V. I. Man'ko, L. A Markovich
Entropic inequalities related to the quantum mutual information for bipartite system and tomographic mutual information is studied for Werner state of two qubits. Quantum correlati…
Wigner function and the probability representation of quantum states
Margarita A. Man'ko, Vladimir I. Man'ko
The relation of the Wigner function with the fair probability distribution called tomographic distribution or quantum tomogram associated with the quantum state is reviewed. The co…
Subadditivity condition for spin-tomograms and density matrices of arbitrary composite and noncomposite qudit systems
V. N. Chernega, O. V. Man'ko, V. I. Man'ko
New quantum entropic inequality for states of system of n >_ 1 qudits is obtained. The inequality has the form of quantum subadditivity condition of bipartite qudit system and coin…
Quantum correlations expressed as information and entropic inequalities for composite and noncomposite systems
Margarita A Man'ko, Vladimir I Man'ko
For noncomposite systems in classical and quantum domains, we obtain new inequalities such as the subadditivity and strong subadditivity conditions for Shannon entropies and inform…
Tomography of a multimode quantum black box
Ilya A. Fedorov, Aleksey K. Fedorov, Yury V. Kurochkin +1
We report a technique for experimental characterization of an -mode quantum optical process, generalizing the single-mode coherent-state quantum-process tomography method [M. Lo…
Balance equations-based properties of the Rabi Hamiltonian
Antonino Messina, Anna Napoli, Margarita A. Man'ko +1
A stationary physical system satisfies peculiar balance conditions involving mean values of appropriate observables. In this paper we show how to deduce such quantitative links, na…
Tomographic and improved subadditivity conditions for two qubits and qudit with j = 3=2
V. N. Chernega, O. V. Man'ko
New entropic inequality for quantum and tomographic Shannon information for system of two qubits is obtained. The inequality relating quantum information and spin-tomographic infor…