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- B. M. Escher, Luiz Davidovich, N. S. Zagury, R.L. de Matos Filho
- Physical review letters
- 2012

The minimum achievable statistical uncertainty in the estimation of physical parameters is determined by the quantum Fisher information. Its computation for noisy systems is still a challengingâ€¦ (More)

- AndrÃ© Filipe Rodrigues de Carvalho, R.L. de Matos Filho, L Davidovich
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2004

We discuss the roles of the macroscopic limit and different system-environment interactions in a quantum-classical transition for a chaotic system. We consider the kicked harmonic oscillator subjectâ€¦ (More)

- Mirco Taddei, B. M. Escher, Luiz Davidovich, R.L. de Matos Filho
- Physical review letters
- 2013

The evaluation of the minimal evolution time between two distinguishable states of a system is important for assessing the maximal speed of quantum computers and communication channels. Lower boundsâ€¦ (More)

- S. P. Walborn, Bruno G. Taketani, A. A. de Salles, Fabricio Toscano, R.L. de Matos Filho
- Physical review letters
- 2009

We derive several entanglement criteria for bipartite continuous variable quantum systems based on the Shannon entropy. These criteria are more sensitive than those involving only second-orderâ€¦ (More)

- Adriana Barrozo Ribeiro Furuguem Carvalho, Perola Milman, R.L. de Matos Filho, Luiz Davidovich
- Physical review letters
- 2001

We present a proposal for protecting states against decoherence, based on the engineering of pointer states. We apply this procedure to the vibrational motion of a trapped ion, and show how toâ€¦ (More)

- Eugenia Solano, R.L. de Matos Filho, N. S. Zagury
- Physical review letters
- 2001

We propose a scalable procedure to generate superpositions of motional coherent states and also entangled vibronic states in N trapped ions. Beyond their fundamental importance, these states may beâ€¦ (More)

- R.L. de Matos Filho, Michel Abanto, Belita Koiller, Luiz Davidovich
- 2008 Conference on Lasers and Electro-Optics andâ€¦
- 2008

We propose a quantum computation scheme, which combines a silicon donor quantum computing architecture with the optical initialization, manipulation, and detection processes already demonstrated inâ€¦ (More)

- Marcelo FranÃ§a Santos, Eugenia Solano, R.L. de Matos Filho
- Physical review letters
- 2001

We propose a scheme for producing large Fock states in cavity QED via the implementation of a highly selective atom-field interaction. It is based on Raman excitation of a three-level atom by aâ€¦ (More)

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