LMI Seminar: Experimentally testing the spontaneous disentanglement hypothesis using a magnetic resonator

Abstract:

The spontaneous disentanglement hypothesis is motivated by two outstanding issues in the foundations of quantum mechanics (QM). The first one originates from the collapse postulate. This postulate arguably gives rise to an internal inconsistency in QM [1], which was first introduced in 1935 by Schrodinger [2], and which is commonly known as the problem of quantum measurement. Moreover, the spontaneous disentanglement hypothesis is relevant to an apparent conflict between the linearity of standard QM, and experimental observations of multi–stabilities and phase transitions in finite quantum systems.

The hypothesis that disentanglement spontaneously occurs in quantum systems is experimentally tested using a ferrimagnetic resonator. According to this hypothesis, time evolution is governed by a modified master equation having an added nonlinear term, which deterministically generates disentanglement. The added term can give rise to multistabilities, which are otherwise theoretically excluded. Bistability is experimentally observed in the resonator’s response to an externally applied monochromatic driving [3]. Experimental results are compared with predictions derived from the disentanglement–based model, and an alternative model, which is based on the method of Bosonization and the Holstein–Primakoff transformation. It is found that better agreement with data is obtained from the disentanglement–based model. This finding, together with a difficulty to justify the Bosonization–based model, indirectly support the spontaneous disentanglement hypothesis.

[1] Roger Penrose, “Uncertainty in quantum mechanics: faith or fantasy?”, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 369, 4864 (2011).

[2] E. Schrodinger, “Die gegenwartige situation in der quantenmechanik”, Naturwissenschaften 23, 807(1935).

[3] “Disentanglement–induced bistability in a magnetic resonator”, Advanced Quantum Technologies, 2400587 (2025).