Noise sensitivity of an atomic velocity sensor

Noise sensitivity of an atomic velocity sensor Theoretical and experimental treatment

We use Bloch oscillations to accelerate coherently Rubidium atoms. The variation of the velocity induced by this acceleration is an integer number times the recoil velocity due to the absorption of one photon. The measurement of the velocity variation is achieved using two velocity selective Raman πpulses: the first pulse transfers atoms from the hyperfine state 5S1/2, |F = 2, mF = 0〉 to 5S1/2,...

Sensitivity to thermal noise of atomic Einstein-Podolsky-Rosen entanglement

We examine the prospect of demonstrating Einstein-Podolsky-Rosen (EPR) entanglement for massive particles using spin-changing collisions in a spinor Bose-Einstein condensate. Such a demonstration has recently been attempted by Gross et al. [Nature (London) 480, 219 (2011)] using a condensate of 87Rb atoms trapped in an optical lattice potential. For the condensate initially prepared in the (F,m...

Directional Sensitivity of a Three Dimensional Particle Velocity Sensor

⎯ The omni-directional sensitivity pattern of an integrated three dimensional acoustic sensor, composed of four hot-wire particle velocity sensors is analyzed theoretically and experimentally. We investigate the influence of the presence of the probe surface on the direction of the measured particle velocity measured by the sensors, and a description of the gas flow profile around the integrate...

An Analog VLSI Velocity Sensor

An integrated circuit that computes the velocity vector of a visual stimulus in one dimension is presented. The circuit combines optical sensors and associated electronics on a single silicon chip, processed with standard CMOS technology. The velocity is inferred from the time delay of the appearance of an image feature at two xed locations on the chip. The circuit operates quite robustly for h...

Differential Equation of Sensitivity Matrix for Final Velocity Constraint