Testing Spontaneous Collapse Models with Coulomb Mediated Squeezing

• URL: http://arxiv.org/abs/2604.21705v1
• Date: Thu, 23 Apr 2026 14:12:19 GMT
• Title: Testing Spontaneous Collapse Models with Coulomb Mediated Squeezing
• Abstract summary: We show that detecting steady-state Coulomb-mediated reduction in the thermal variance of the differential motional mode of two nanospheres can bound the Continuous Spontaneous Localization (CSL) parameter.<n>For realistic experimental parameters, the resulting bounds are comparable to those obtained from X-ray emission experiments and surpass those set by bulk-heating ones.<n>In the short-time regime, we find that a weak Coulomb-induced entanglement-based test between two charged nanospheres in ground state can provide constraints on $_textCSL$ comparable to limits set by early X-ray experiments
• Score: 0.03823356975862006
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We show that detecting steady-state Coulomb-mediated reduction in the thermal variance of the differential motional mode of two nanospheres can bound the Continuous Spontaneous Localization (CSL) parameter ($λ_{\text{CSL}}$). For realistic experimental parameters, the resulting bounds are comparable to those obtained from X-ray emission experiments and surpass those set by bulk-heating ones. Unlike these latter experiments, our bounds are robust against plausible coloured-noise extensions of collapse models. In the short-time regime, we find that a weak Coulomb-induced entanglement-based test between two charged nanospheres initialized in ground state can provide constraints on $λ_{\text{CSL}}$ comparable to limits set by early X-ray experiments.

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