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11 papers · 2 filters
Vanishing quantum discord is not necessary for completely-positive maps
Aharon Brodutch, Animesh Datta, Kavan Modi +2
The description of the dynamics of a system that may be correlated with its environment is only meaningful within the context of a specific framework. Different frameworks rely upo…
Dissipative and stochastic geometric phase of a qubit within a canonical Langevin framework
Pedro Bargueño, S. Miret-Artés
Dissipative and stochastic effects in the geometric phase of a qubit are taken into account using a geometrical description of the corresponding open--system dynamics within a cano…
Entanglement, fractional magnetization and long-range interactions
Andrea Cadarso, Mikel Sanz, Michael M. Wolf +2
Based on the theory of Matrix Product States, we give precise statements and complete analytical proofs of the following claim: a large fractionalization in the magnetization or th…
Many-body transverse interactions in the quantum annealing of the p-spin ferromagnet
Beatriz Seoane, Hidetoshi Nishimori
We study the performance of quantum annealing for the simple -body infinite-range ferromagnetic Ising model. In particular, we generalize the transverse antiferromagnetic intera…
Symmetric discrete coherent states for n qubits
C. Munoz, A. B. Klimov, L. L. Sanchez-Soto
We put forward a method of constructing discrete coherent states for n qubits. After establishing appropriate displacement operators, the coherent states appear as displaced versio…
Hybrid classical-quantum formulations ask for hybrid notions
Carlos Barceló, Raúl Carballo-Rubio, Luis J. Garay +1
We reappraise some of the hybrid classical-quantum models proposed in the literature with the goal of retrieving some of their common characteristics. In particular, first, we anal…