ua nt - p h / 01 11 05 2 v 2 2 8 Fe b 20 02 High contrast Mach - Zehnder lithium atom interferometer in the Bragg regime

ua nt - p h / 01 11 05 2 v 1 8 N ov 2 00 1 High contrast Mach - Zehnder lithium atom interferometer in the Bragg regime

We have constructed an atom interferometer of the Mach-Zehnder type, operating with a thermal lithium beam. Atom diffraction uses Bragg diffraction on laser standing waves. With first order diffraction, our apparatus has given a large signal and a very good fringe contrast (74%), which we believe to be the highest ever observed with atom interferometers. This apparatus will be applied to high s...

ar X iv : q ua nt - p h / 05 11 05 9 v 1 7 N ov 2 00 5 Phase Sensitivity of a Mach -

The best performance of a Mach-Zehnder interferometer is achieved with the input state |NT /2+ 1〉|NT /2 − 1〉 + |NT /2 − 1〉|NT /2 + 1〉, being NT the total number of atoms/photons. This gives: i) a phase-shift error confidence C68% = 2.67/NT with ii) a single interferometric measurement. Different input quantum states can achieve the Heisenberg scaling ∼ 1/NT but with higher prefactors and at the...

ua nt - p h / 04 02 17 8 v 1 2 4 Fe b 20 04 On the structure of optimal sets for tensor product channel

ar X iv : q ua nt - p h / 04 02 02 8 v 2 7 Fe b 20 05 External Time - Varying Fields and Electron Coherence Jen

The effect of time-varying electromagnetic fields on electron coherence is investigated. A sinusoidal electromagnetic field produces a time varying Aharonov-Bohm phase. In a measurement of the interference pattern which averages over this phase, the effect is a loss of contrast. This is effectively a form of decoherence. We calculate the magnitude of this effect for various electromagnetic fiel...

A Review of Optical Routers in Photonic Networks-on-Chip: A Literature Survey

Due to the increasing growth of processing cores in complex computational systems, all the connection converted bottleneck for all systems. With the protection of progressing and constructing complex photonic connection on chip, optical data transmission is the best choice for replacing with electrical interconnection for the reason of gathering connection with a high bandwidth and insertion lo...