no code implementations • 19 Mar 2018 • Leonardo Andreta de Castro, Carlos Alexandre Brasil, Reginaldo de Jesus Napolitano
Weak measurements have an increasing number of applications in contemporary quantum mechanics.
Quantum Physics
no code implementations • 25 May 2016 • Leonardo Andreta de Castro, Carlos Alexandre Brasil, Reginaldo de Jesus Napolitano
The energy levels of hydrogen-like atoms are obtained from the phase-space quantization, one of the pillars of the old quantum theory, by three different methods - (i) direct integration, (ii) Sommerfeld's original method, and (iii) complex integration.
Quantum Physics
no code implementations • 14 Sep 2013 • Carlos Alexandre Brasil, Leonardo Andreta de Castro, Reginaldo de Jesus Napolitano
Contrary to conventional quantum mechanics, which treats measurement as instantaneous, here we explore a model for finite-time measurement.
Quantum Physics
no code implementations • 22 Sep 2011 • Leonardo Andreta de Castro, Reginaldo de Jesus Napolitano
We propose a method for applying the quantum error-correction method for errors that occur during quantum gates.
Quantum Physics
no code implementations • 21 Sep 2011 • Carlos Alexandre Brasil, Leonardo Andreta de Castro, Reginaldo de Jesus Napolitano
Analysing the behavior of the coherence, which tends to a value asymptotically close to zero, we obtain an expression for the time of measurement which depends only on the system-measurer coupling, and which does not depend on whether the observable commutes with the system-bath interaction.
Quantum Physics
no code implementations • 22 Jun 2011 • Carlos Alexandre Brasil, Leonardo Andreta de Castro, Reginaldo de Jesus Napolitano
We have tested the validity of the analytical predictions against an exact numerical approach, based on the superoperator-splitting method, that confirms the protection of the initial state of the system.
Quantum Physics
