Quantum enhanced estimation of optical detector efficiencies

Enhanced and tunable optical quantum efficiencies from plasmon bandwidth engineering in bimetallic CoAg nanoparticles

A quantum-enhanced prototype gravitational-wave detector

K. GODA1, O. MIYAKAWA2, E. E. MIKHAILOV3, S. SARAF4, R. ADHIKARI2, K. MCKENZIE5, R. WARD2, S. VASS2, A. J. WEINSTEIN2 AND N. MAVALVALA1* LIGO Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA LIGO Laboratory, California Institute of Technology, Pasadena, California 91125, USA The College of William and Mary, Williamsburg, Virginia 23187, USA Rochester Instit...

development of different optical methods for determination of glucose using cadmium telluride quantum dots and silver nanoparticles

a simple, rapid and low-cost scanner spectroscopy method for the glucose determination by utilizing glucose oxidase and cdte/tga quantum dots as chromoionophore has been described. the detection was based on the combination of the glucose enzymatic reaction and the quenching effect of h2o2 on the cdte quantum dots (qds) photoluminescence.in this study glucose was determined by utilizing glucose...

Quantum-enhanced optical-phase tracking.

Tracking a randomly varying optical phase is a key task in metrology, with applications in optical communication. The best precision for optical-phase tracking has until now been limited by the quantum vacuum fluctuations of coherent light. Here, we surpass this coherent-state limit by using a continuous-wave beam in a phase-squeezed quantum state. Unlike in previous squeezing-enhanced metrolog...

Quantum Enhanced Estimation of a Multidimensional Field.

We present a framework for the quantum enhanced estimation of multiple parameters corresponding to noncommuting unitary generators. Our formalism provides a recipe for the simultaneous estimation of all three components of a magnetic field. We propose a probe state that surpasses the precision of estimating the three components individually, and we discuss measurements that come close to attain...