References & Citations
Quantum Physics
Title: Testing spontaneous wavefunction collapse with quantum electromechanics
(Submitted on 29 Jun 2022 (v1), last revised 9 Aug 2022 (this version, v3))
Abstract: Theories of spontaneous wavefunction collapse offer an explanation of the possible breakdown of quantum mechanics for macroscopic systems. However, the challenge of resolving predicted collapse signatures above background noise has precluded conclusive tests. Here, we propose to overcome this challenge using a superconducting qubit to precisely readout the collapse-induced heating of a mechanical resonator. We show that the ability to strongly couple the qubit to the resonator can enable both fast measurements and initialization of the qubit close to its ground state. Combined this greatly suppresses the influence of quasiparticle heating of the qubit, which we predict to be the dominant noise source. We find that bulk acoustic wave resonances can amplify the collapse induced heating due to their ultra-low dissipation. Together, this could enable a conclusive test of collapse models.
Submission history
From: Germain Tobar Mr [view email][v1] Wed, 29 Jun 2022 10:56:00 GMT (11601kb,D)
[v2] Thu, 28 Jul 2022 18:34:29 GMT (15004kb,D)
[v3] Tue, 9 Aug 2022 10:28:16 GMT (14991kb,D)
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