Negative differential conductivity in an interacting quantum gas
Ralf Labouvie, Bodhaditya Santra, Simon Heun, Sandro Wimberger, and, Herwig Ott
TL;DR
This paper demonstrates negative differential conductivity in a neutral atom quantum transport device, revealing a new microscopic mechanism and opening pathways for complex quantum circuit control.
Contribution
It presents the first observation of NDC in a neutral atom quantum device using a multi-mode tunneling junction, highlighting a novel physical mechanism.
Findings
Observation of NDC in neutral atom system
Identification of a new microscopic mechanism for NDC
Potential for advanced quantum circuit control
Abstract
Negative differential conductivity (NDC) is a widely exploited effect in modern electronic components. Here, a proof-of-principle is given for the observation of NDC in a quantum transport device for neutral atoms employing a multi-mode tunneling junction. The transport of the many-body quantum system is governed by the interplay between the tunnel coupling, the interaction energy and the thermodynamics of intrinsic collisions, which turn the coherent coupling into a hopping process. The resulting current voltage characteristics exhibit NDC, for which we identify a new microscopic physical mechanism. Our study opens new ways for the future implementation and control of complex neutral atom quantum circuits.
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