Supersymmetry-like tunneling current noise as a probe of Goldstino excitation in a Bose-Fermi mixture

Tingyu Zhang

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arXiv · 2410.20794

Supersymmetry-like tunneling current noise as a probe of Goldstino excitation in a Bose-Fermi mixture

Tingyu Zhang

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Abstract

The Goldstino, which is a fermionic Nambu-Goldstone mode, has been predicted in a Bose-Fermi mixture when the supersymmetry is broken. To detect this excitation mode, we theoretically investigate the shot noise of the supersymmetry-like tunneling current in a weakly interacting ultracold Bose-Fermi mixture. The Fano factor, which is defined by the noise-to-current ratio, reflect the elementary carriers of the tunneling process. The change of the Fano factor microscopically as the density changes evinces a crossover from the quasiparticle transport to multiparticle (Goldstino) transport. The tunneling channel can also be changed by tuning the potential barrier.

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Tingyu Zhang. 2024-10-28. Supersymmetry-like tunneling current noise as a probe of Goldstino excitation in a Bose-Fermi mixture. https://arxiv.org/abs/2410.20794

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