Quantum sensors, offering novel sensing and imaging technologies beyond the capabilities of any classical device, enable harnessing new technologies from atomic clocks and nanoscale microscopy to gravitational wave detection and delicate biological measurements. We consider the performance of
W-type quantum states as the probe for the networked quantum sensors. Providing an analytic result on the metrological performance of networked quantum sensors, we attain a criterion for the enhancement of the distributed phase estimations in networked quantum sensors. This insight enables us to compare the metrological power of certain quantum states. We also consider schemes that enable the generation and utility of such entangled quantum probes in practical settings.
Atomic clocks are an important part of many potential quantum sensors, in addition to constituting a type of quantum sensor in their own right. For many applications, high-performance clocks must be realized in a manner compatible with operation outside of a laboratory. In this talk, I will outline efforts at developing the integrated photonics technology needed to miniaturize optical atomic clocks, including our lab’s own efforts on nonlinear nanophotonics components. I will also discuss how such integrated photonics can also impact the development of other types of quantum sensors, and present some of the challenges involved in advancing these technologies.