Biomedical subjects

R L de Matos Filho

Publications and source records attributed to R L de Matos Filho.

3 recordsLinked to original sources

PubMed2001

Conditional large Fock state preparation and field state reconstruction in cavity QED.

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 a classical field and a quantized field mode. Selectivity appears when one tunes to resonance a specific transition inside a chosen atom-field subspace, while other transitions remain dispersive, as a consequence of the field dependent electronic energy shifts. We show that this scheme can be also employed for reconstructing, in a new and efficient way, the Wigner function of the cavity field state.

Journal Article↗

PubMed2001

Mesoscopic superpositions of vibronic collective states of N trapped ions.

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 be of interest for quantum information processing and may be used in experimental studies on decoherence.

Journal Article↗

PubMed2001

Decoherence, pointer engineering, and quantum state protection.

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 to protect qubits, squeezed states, approximate phase eigenstates, and superpositions of coherent states.

Journal Article↗