Measurement of a weak transition moment using two-pathway coherent control

Continuous weak measurement of quantum coherent oscillations

We consider the problem of continuous quantum measurement of coherent oscillations between two quantum states of an individual two-state system. It is shown that the interplay between the information acquisition and the backaction dephasing of the oscillations by the detector imposes a fundamental limit, equal to four, on the signal-to-noise ratio of the measurement. The limit is universal, e.g...

Measurement of absolute transition dipole moment functions

We describe a two-laser experiment using optical-optical double resonance fluorescence and Autler– Townes AT splittings to determine the NaK 3 1 →1 X 1 +, 2 A 1 + absolute transition dipole moment functions. Resolved 3 1 →A 1 + and 3 1 →X 1 + fluorescence was recorded with the frequencies of a titanium-sapphire laser L1 and a ring dye laser L2 fixed to excite particular 3 1 =19,J=11, f ←A 1 + ,...

Feedback control of coherent spin states using weak nondestructive measurements

A Measurement of High Gain Sase Fel Induced Electron Beam Micro-bunching Using Coherent Transition Radiation

Coherent transition radiation (CTR) was used to study the longitudinal modulations of an electron beam exiting the UCLA/LANL high gain SASE FEL. The induced longitudinal micro-bunching of the electron beam at the exit of the undulator was measured with a frequency domain technique using the CTR emitted when this beam strikes a thin conducting foil. Formalisms for both CTR and SASE theories are ...

Congestion measurement in data envelopment analyses under weak disposability of desirable and undesirable outputs in a Two-phase Network

Congestion is one of the main issues in data envelopment analyses which have particular importance. Recently researches about congestion, whether in economic articles or in Operations Research articles in had grown increasingly. Congestion is a wasteful stage of the production process where outputs are reduced due to excessive amount of inputs. In economics, congestion is very important because...