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- W2596271418 abstract "We present a scanning probe microscopy technique for spatially resolving transport in cold atomic gases, in close analogy with scanning gate microscopy in semiconductor physics. The conductance of a quantum point contact connected to two atomic reservoirs is measured in the presence of a tightly focused laser beam acting as a local perturbation that can be precisely positioned in space. By scanning its position and recording the subsequent variations of conductance, we retrieve a high-resolution map of transport through a quantum point contact. We demonstrate a spatial resolution comparable to the extent of the transverse wave function of the atoms inside the channel, and a position sensitivity below 10nm. Our measurements agree well with an analytical model and ab-initio numerical simulations, allowing us to identify a regime in transport where tunneling dominates over thermal effects. Our technique opens new perspectives for the high-resolution observation and manipulation of cold atomic gases." @default.
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- W2596271418 date "2017-07-21" @default.
- W2596271418 modified "2023-10-18" @default.
- W2596271418 title "Scanning Gate Microscope for Cold Atomic Gases" @default.
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- W2596271418 doi "https://doi.org/10.1103/physrevlett.119.030403" @default.
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