411 citations · 1.5k across the 20 of their papers we have counts for
20 papers
Collective Uncertainty in Partially-Polarized and Partially-Decohered Spin-1/2 Systems
Ben Q. Baragiola, Bradley A. Chase, JM Geremia
It has become common practice to model large spin ensembles as an effective pseudospin with total angular momentum J = N x j, where j is the spin per particle. Such approaches (at…
Continuous Measurement of Spin Systems with Spatially-Distinguishable Particles
Ben Q. Baragiola, Bradley A. Chase, JM Geremia
It is generally believed that dispersive polarimetric detection of collective angular momentum in large atomic spin systems gives rise to: squeezing in the measured observable, ant…
Amplified Quantum Dynamics and Enhanced Parameter Sensitivity via Coherent Feedback in Collective Atomic Spin Systems
Bradley A. Chase, JM Geremia
We consider the effective dynamics obtained by double-passing a far-detuned laser probe through a large atomic spin system. The net result of the atom-field interaction is a type o…
Magnetometry via a double-pass continuous quantum measurement of atomic spin
Bradley A. Chase, Ben Q. Baragiola, Heather L. Partner +2
We argue that it is possible in principle to reduce the uncertainty of an atomic magnetometer by double-passing a far-detuned laser field through the atomic sample as it undergoes…
Single shot parameter estimation via continuous quantum measurement
Bradley A. Chase, J. M. Geremia
We present filtering equations for single shot parameter estimation using continuous quantum measurement. By embedding parameter estimation in the standard quantum filtering formal…
Collective processes of an ensemble of spin-1/2 particles
Bradley A. Chase, J. M. Geremia
When the dynamics of a spin ensemble are expressible solely in terms of symmetric processes and collective spin operators, the symmetric collective states of the ensemble are prese…