3 v 1 2 M ar 1 99 9 Characterizing teleportation in optics

ar X iv : q ua nt - p h / 98 06 04 8 v 1 14 J un 1 99 8 Quantum Computation With Linear Optics

We present a constructive method to translate small quantum circuits into their optical analogues, using linear components of present-day quantum optics technology only. These optical circuits perform precisely the computation that the quantum circuits are designed for, and can thus be used to test the performance of quantum algorithms. The method relies on the representation of several quantum...

ar X iv : a st ro - p h / 96 07 14 6 v 1 2 9 Ju l 1 99 6 An Optical Ultrahigh Resolution Spectrograph for Use with Adaptive Optics

ar X iv : q ua nt - p h / 99 06 11 0 v 1 2 8 Ju n 19 99 Quantum teleportation of EPR pair by three - particle entanglement

Teleportation of an EPR pair using triplet in state of the Horne-Greenberger-Zeilinger form to two receivers is considered. It needs a three-particle basis for joint measurement. By contrast the one qubit teleportation the required basis is not maximally entangled. It consists of the states corresponding to the maximally entanglement of two particles only. Using outcomes of measurement both rec...

ar X iv : q ua nt - p h / 99 07 04 1 v 2 2 5 Fe b 20 00 Entanglement Teleportation via Werner States

Transfer of entanglement and information is studied for quantum teleportation of an unknown entangled state through noisy quantum channels. We find that the quantum entanglement of the unknown state can be lost during the teleportation even when the channel is quantum correlated. We introduce a fundamental parameter of correlation information which dissipates linearly during the teleportation t...

ar X iv : c on d - m at / 9 70 32 48 v 1 2 8 M ar 1 99 7 Low - Temperature Features of Nano - Particle Dynamics

In view of better characterizing possible quantum effects in the dynamics of nanometric particles, we measure the effect on the relaxation of a slight heating cycle. The effect of the field amplitude is studied; its magnitude is chosen in order to induce the relaxation of large particles (∼ 7nm), even at very low temperatures (100mK). Below 1K, the results significantly depart from a simple the...