Colloquium: Understanding quantum weak values: Basics and applications
Since its introduction 25 years ago, the quantum weak value has gradually transitioned from
a theoretical curiosity to a practical laboratory tool. While its utility is apparent in the recent …
a theoretical curiosity to a practical laboratory tool. While its utility is apparent in the recent …
Nonperturbative theory of weak pre-and post-selected measurements
This paper starts with a brief review of the topic of strong and weak pre-and post-selected
(PPS) quantum measurements, as well as weak values, and afterwards presents original …
(PPS) quantum measurements, as well as weak values, and afterwards presents original …
Negative quasiprobabilities enhance phase estimation in quantum-optics experiment
Operator noncommutation, a hallmark of quantum theory, limits measurement precision,
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …
Technical advantages for weak-value amplification: when less is more
The technical merits of weak-value-amplification techniques are analyzed. We consider
models of several different types of technical noise in an optical context and show that weak …
models of several different types of technical noise in an optical context and show that weak …
Phase estimation with weak measurement using a white light source
We report results of a high precision phase estimation based on a weak measurement
scheme using a commercial light-emitting diode. The method is based on a measurement of …
scheme using a commercial light-emitting diode. The method is based on a measurement of …
Quantum advantage in postselected metrology
In every parameter-estimation experiment, the final measurement or the postprocessing
incurs a cost. Postselection can improve the rate of Fisher information (the average …
incurs a cost. Postselection can improve the rate of Fisher information (the average …
Weak-values technique for velocity measurements
In a recent Letter, Brunner and Simon proposed an interferometric scheme using imaginary
weak values with a frequency-domain analysis to outperform standard interferometry in …
weak values with a frequency-domain analysis to outperform standard interferometry in …
Weak value amplification can outperform conventional measurement in the presence of detector saturation
Weak value amplification (WVA) is a technique by which one can magnify the apparent
strength of a measurement signal. Some have claimed that WVA can outperform more …
strength of a measurement signal. Some have claimed that WVA can outperform more …
Significance of the imaginary part of the weak value
Unlike the real part of the generalized weak value of an observable, which can in a restricted
sense be operationally interpreted as an idealized conditioned average of that observable in …
sense be operationally interpreted as an idealized conditioned average of that observable in …
Tests of fundamental quantum mechanics and dark interactions with low-energy neutrons
Among the known particles, the neutron is special because it provides experimental access
to all of the four fundamental forces and a wide range of hypothetical interactions. Despite …
to all of the four fundamental forces and a wide range of hypothetical interactions. Despite …