Add to ORKGWe discuss the thermal and magnetic entanglement in the one-dimensional Kondo necklace model. Firstly, we show how the entanglement naturally present at zero temperature is distributed among pairs of spins according to the strength of the two couplings of the chain, namely, the Kondo exchange interaction and the hopping energy. The effect of the temperature and the presence of an external magnetic field is then investigated, being discussed the adjustment of these variables in order to control the entanglement available in the system. In particular, it is indicated the existence of a critical magnetic field above which the entanglement undergoes a sharp variation, leading the ground state to a completely unentangled phase
Using a closed-economy model, Jensen (2002) and Walsh (2003), have, respectively shown that a policy...
We investigate the decoherence of a superposition of symmetric collective internal states of an atom...
The vertical radiation force on an absorbing micrometer-sized dielectric sphere situated in an evane...
We analyse the quantum mechanical limits to the plasmon-assisted entanglement transfer observed by E...
We analyze quantum teleportation and entanglement swapping for spin systems. If the permitted operat...
Taking recent experiments as examples, we discuss the conditions for sub-wavelength probing of optic...
Strong, fast pulses, called ``bang-bang'' controls can be used to eliminate the effects of system-en...
We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an ...
It is shown that using non-abelian horizontal gauge symmetry and anomalous U(1)_A symmetry in grand ...
A measurement strategy is developed for a new kind of hypothesis testing. It assigns, with minimum p...
We present a general discussion of the techniques of destabilizing dark states in laser-driven atoms...
We propose that the inflaton is coupled to ordinary matter only gravitationally and that it decays i...
The investigation of input-output systems often requires a sophisticated choice of test inputs to ma...
We predict theoretically and demonstrate experimentally an ellipticity-dependent nonlinear magneto-o...
We show that the propagation of warps in gaseous disks can be strongly affected by compressional eff...
Using a closed-economy model, Jensen (2002) and Walsh (2003), have, respectively shown that a policy...
We investigate the decoherence of a superposition of symmetric collective internal states of an atom...
The vertical radiation force on an absorbing micrometer-sized dielectric sphere situated in an evane...
We analyse the quantum mechanical limits to the plasmon-assisted entanglement transfer observed by E...
We analyze quantum teleportation and entanglement swapping for spin systems. If the permitted operat...
Taking recent experiments as examples, we discuss the conditions for sub-wavelength probing of optic...
Strong, fast pulses, called ``bang-bang'' controls can be used to eliminate the effects of system-en...
We investigate the occurrence and nature of a naked singularity in the gravitational collapse of an ...
It is shown that using non-abelian horizontal gauge symmetry and anomalous U(1)_A symmetry in grand ...
A measurement strategy is developed for a new kind of hypothesis testing. It assigns, with minimum p...
We present a general discussion of the techniques of destabilizing dark states in laser-driven atoms...
We propose that the inflaton is coupled to ordinary matter only gravitationally and that it decays i...
The investigation of input-output systems often requires a sophisticated choice of test inputs to ma...
We predict theoretically and demonstrate experimentally an ellipticity-dependent nonlinear magneto-o...
We show that the propagation of warps in gaseous disks can be strongly affected by compressional eff...
Using a closed-economy model, Jensen (2002) and Walsh (2003), have, respectively shown that a policy...
We investigate the decoherence of a superposition of symmetric collective internal states of an atom...
The vertical radiation force on an absorbing micrometer-sized dielectric sphere situated in an evane...