Experimentally testing the spontaneous disentanglement hypothesis using a magnetic resonator

by Prof. Eyal Buks

Technion

at Condensed Matter Seminar

Mon, 21 Apr 2025, 11:10
Sacta-Rashi Building for Physics (54), room 207

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 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).

Created on 16-04-2025 by Bar Lev, Yevgeny (ybarlev)
Updaded on 16-04-2025 by Bar Lev, Yevgeny (ybarlev)