2.3k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Centre National de la Recherche ScientifiqueFR835 papers
- The Ohio State UniversityUS812 papers
- Universidade de São PauloBR798 papers
- Panjab UniversityIN636 papers
- Universidade Federal do ABCBR635 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TorinoIT634 papers
- Institut National de Physique Nucléaire et de Physique des ParticulesFR603 papers
- Benemérita Universidad Autónoma de PueblaMX594 papers
- European Organization for Nuclear ResearchCH583 papers
- Wayne State UniversityUS576 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT570 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di CataniaIT565 papers
14 papers · 2 filters
Effective cross-Kerr nonlinearity and robust phase gates with trapped ions
F. L. Semiao, A. Vidiella-Barranco
We derive an effective Hamiltonian that describes a cross-Kerr type interaction in a system involving a two-level trapped ion coupled to the quantized field inside a cavity. We ass…
Generalized Teleportation Protocol
Goren Gordon, Gustavo Rigolin
A generalized teleportation protocol (GTP) for N qubits is presented, where the teleportation channels are non-maximally entangled and all the free parameters of the protocol are c…
Variational approach to dequantization
Ricardo A. Mosna, Ian P. Hamilton, Luigi Delle Site
We present a dequantization procedure based on a variational approach whereby quantum fluctuations latent in the quantum momentum are suppressed. This is done by adding generic loc…
The stationary phase condition applicability to the study of tunnel effect
Alex E. Bernardini
Some recent theoretical studies have tended to employ analytically-continuous {\em gaussian}, or infinite-bandwidth step pulses to examine tunneling process. The stationary phase m…
Semiclassical coherent state propagator for systems with spin
A. D. Ribeiro, M. A. M. de Aguiar, A. F. R. de Toledo Piza
We derive the semiclassical limit of the coherent state propagator for systems with two degrees of freedom of which one degree of freedom is canonical and the other a spin. Systems…
Real trajectories in the semiclassical coherent state propagator
Marcel Novaes
The semiclassical approximation to the coherent state propagator requires complex classical trajectories in order to satisfy the associated boundary conditions, but finding these t…
Generation of generalized coherent states with two coupled Bose-Einstein condensates
L. Sanz, M. H. Y. Moussa, K. Furuya
We present a scheme to prepare generalized coherent states in a system with two species of Bose-Einstein condensates. First, within the two-mode approximation, we demonstrate that…
Quantum Entanglement and fixed point Hopf bifurcation
M. C. Nemes, K. Furuya, G. Q. Pellegrino +3
We present the qualitative differences in the phase transitions of the mono-mode Dicke model in its integrable and chaotic versions. We show that a first order phase transition occ…
Genuine Multipartite Entanglement in Quantum Phase Transitions
Thiago R. de Oliveira, Gustavo Rigolin, Marcos C. de Oliveira
We demonstrate that the Global Entanglement (GE) measure defined by Meyer and Wallach, J. Math. Phys. 43, 4273 (2002), is maximal at the critical point for the Ising chain in a tra…
Entanglement versus mixedness for coupled qubits under a phase damping channel
E. S. Cardoso, M. C. de Oliveira, K. Furuya
Quantification of entanglement against mixing is given for a system of coupled qubits under a phase damping channel. A family of pure initial joint states is defined, ranging from…
A Uniform Approximation for the Coherent State Propagator using a Conjugate Application of the Bargmann Representation
A. D. Ribeiro, M. Novaes, M. A. M. de Aguiar
We propose a conjugate application of the Bargmann representation of quantum mechanics. Applying the Maslov method to the semiclassical connection formula between the two represent…
Semiclassical propagation of spin coherent states
M. Novaes
The semiclassical propagation of spin coherent states is considered in complex phase space. For two time-independent systems we find the appropriate classical trajectories and show…
Quantum-classical correspondence via a deformed kinetic operator
Ricardo A. Mosna, Ian P. Hamilton, Luigi Delle Site
We propose an approach to the quantum-classical correspondence based on a deformation of the momentum and kinetic operators of quantum mechanics. Making use of the factorization me…
Semiclassical propagation of coherent states using complex and real trajectories
M. Novaes, M. A. M. de Aguiar
We study the semiclassical propagation of coherent states in dimensions, which in general involves complex classical dynamics. Several simple approximations are derived that de…