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19922026
most citedGaia Data Release 2. Summary of the contents and survey properties

8.6k citations

Showing 2003 · quant-phShow all

9 papers · 2 filters

quant-ph2003★ 34 cited

Quantum phases of a qutrit

A. B. Klimov, L. L. Sanchez-Soto, H. de Guise +1

We consider various approaches to treat the phases of a qutrit. Although it is possible to represent qutrits in a convenient geometrical manner by resorting to a generalization of…

quant-ph2003★ 13 cited

Effective damping in the Raman cooling of trapped ions

A. B. Klimov, J. L. Romero, J. Delgado +1

We present a method of treating the interaction of a single three-level ion with two laser beams. The idea is to apply a unitary transformation such that the exact transformed Hami…

quant-ph2003★ 367 cited

Diverging Entanglement Length in Gapped Quantum Spin Systems

F. Verstraete, M. A. Martin-Delgado, J. I. Cirac

We prove the existence of gapped quantum Hamiltonians whose ground states exhibit an infinite entanglement length, as opposed to their finite correlation length. Using the concept…

quant-ph2003★ 3 cited

Inequivalent classes of closed three-level systems

Andre B. Klimov, Hubert de Guise, Luis L. Sanchez-Soto

We show here that the and V configurations of three-level atomic systems, while they have recently been shown to be equivalent for many important physical quantities when drive…

quant-ph2003★ 4 cited

A measurable entanglement criterion for two qubits

Hoshang Heydari, Gunnar Björk, Luis Sánchez-Soto

We propose a directly measurable criterion for the entanglement of two qubits. We compare the criterion with other criteria, and we find that for pure states, and some mixed states…

quant-ph2003★ 12 cited

Single-Step Distillation Protocol with Generalized Beam Splitters

M. A. Martin-Delgado, M. Navascues

We develop a distillation protocol for multilevel qubits (qudits) using generalized beam splitters like in the proposal of Pan et al. for ordinary qubits. We find an acceleration w…

quant-ph2003

Interplay of topology and quantization: topological energy quantization in a cavity

Antonio F. Ranada

The interplay between quantization and topology is investigated in the frame of a topological model of electromagnetism proposed by the author. In that model, the energy of monochr…

quant-ph2003★ 15 cited

Superradiance from an ultrathin film of three-level V-type atoms: Interplay between splitting, quantum coherence and local-field effects

V. A. Malyshev, F. Carreño, M. A. Antón +2

We carry out a theoretical study of the collective spontaneous emission (superradiance) from an ultrathin film comprised of three-level atoms with -configuration of the operatin…

quant-ph2003★ 10 cited

Distillation Protocols for Mixed States of Multilevel Qubits and the Quantum Renormalization Group

M. A. Martin-Delgado, M. Navascues

We study several properties of distillation protocols to purify multilevel qubit states (qudits) when applied to a certain family of initial mixed bipartite states. We find that it…