The photonic spin Hall effect (SHE) refers to the transverse spin separation of photons with
opposite spin angular momentum, after the beam passes through an optical interface or …

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 …

Open physical systems can be described by effective non-Hermitian Hamiltonians that
characterize the gain or loss of energy or particle numbers from the system. Experimental …

In standard quantum weak measurements, preselection and postselection of quantum states
are implemented in the same photon. Here we go beyond this restrictive setting and …

Operator noncommutation, a hallmark of quantum theory, limits measurement precision,
according to uncertainty principles. Wielded correctly, though, noncommutation can boost …

How to measure the optical conductivity of atomically thin crystals is an important but
challenging issue due to the weak light-matter interaction at the atomic scale. The photonic …

In every parameter-estimation experiment, the final measurement or the postprocessing
incurs a cost. Postselection can improve the rate of Fisher information (the average …

We present a weak measurement protocol that permits a sensitive estimation of angular
rotations based on the concept of weak-value amplification. The shift in the state of a pointer …

Abstract Weak values and Kirkwood–Dirac (KD) quasiprobability distributions have been
independently associated with both foundational issues in quantum theory and advantages …

Open systems possess unique potentials in high-precision sensing, yet the majority of
previous studies rely on the spectral singularities known as “exceptional points.” Here, we …