Many emerging quantum technologies demand precise engineering and control over
networks consisting of quantum mechanical degrees of freedom connected by propagating …

The control of individual quantum systems promises a new technology for the 21st century-
quantum technology. This book is the first comprehensive treatment of modern quantum …

We show that continuous quantum nondemolition (QND) measurement of an atomic
ensemble is able to improve the precision of frequency estimation even in the presence of …

To control a quantum system via feedback, we generally have two options in choosing a
control scheme. One is the coherent feedback, which feeds the output field of the system …

Polarized atomic vapors can be used to detect fields interacting with a spin. Recent
advances have extended the sensitivity of atomic magnetometers to a level favorable for …

We present filtering equations for single-shot parameter estimation using continuous
quantum measurement. By embedding parameter estimation in the standard quantum …

It has become common practice to model large spin ensembles as an effective pseudospin
with total angular momentum J= Nj, where j is the spin per particle. Such approaches (at …

The time-symmetric quantum smoothing theory [Tsang, Phys. Rev. Lett. 102, 250403 (2009);
Phys. Rev. A 80, 033840 (2009)] is extended to account for discrete jumps in the classical …

The field of quantum metrology concerns the physical measurement of sensors with a
precision comparable to fundamental limits set by quantum mechanics. It is possible to …

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 …