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 …

One drawback of conventional quantum state tomography is that it does not readily provide
access to single density matrix elements since it requires a global reconstruction. Here, we …

Weak values and measurements have been proposed as a means to achieve dramatic
enhancements in metrology based on the greatly increased range of possible measurement …

In quantum mechanics, the concept of weak measurements allows for the description of a
quantum system both in terms of the initial preparation and the final state (post-selection) …

Quantum measurement remains a puzzle through its stormy history from the birth of quantum
mechanics to state-of-the-art quantum technologies. Two complementary measurement …

Postselected weak measurement is a useful protocol for amplifying weak physical effects.
However, there has recently been controversy over whether it gives any advantage in …

Entanglement and the wave function description are two of the core concepts that make
quantum mechanics such a unique theory. A method to directly measure the wave function …

In quantum theory, a physical observable is represented by a Hermitian operator as it admits
real eigenvalues. This stems from the fact that any measuring apparatus that is supposed to …

A century after its conception, quantum mechanics still hold surprises that contradict many
“common sense” notions. The contradiction is especially sharp in case one consider …

Weak measurement as a nonperturbative theory has been shown to be powerful in the
fundamentals of quantum mechanics and high-precision metrology, in which the pointer is of …