Angular momentum flow without anything carrying it
Yakir Aharonov, Daniel Collins, and Sandu Popescu
Phys. Rev. A 110, L030201 (2024) - Published 5 September, 2024
The authors theoretically demonstrate a flow of angular momentum from one region to another across a region of space in which there is a vanishingly small probability of any particles (or fields) being present. This is contrary to the usual understanding that conserved quantities, such as angular momentum, are carried from one region to another either by particles carrying them, or by particles interacting with one another in a chain.
Unitary collapse of Schrödinger's cat state
Pavel Stránský, Pavel Cejnar, and Radim Filip
Phys. Rev. A 110, L030202 (2024) - Published 19 September, 2024
The authors study a system composed of a single qubit coupled to a soft-mode quantum oscillator. They show that spontaneous unitary evolution of this system create a Schrödinger-cat-like state of the oscillator, which is subsequently lost in a sudden process strongly resembling the measurement-induced collapse of wave function.



















