Non-invasive measurement of currents in analog quantum simulators
- URL: http://arxiv.org/abs/2106.12599v1
- Date: Wed, 23 Jun 2021 18:00:07 GMT
- Title: Non-invasive measurement of currents in analog quantum simulators
- Authors: Kevin T. Geier, Janika Reichstetter, Philipp Hauke
- Abstract summary: We propose a flexible non-invasive technique to measure currents in quantum many-body systems.
We numerically benchmark the scheme at the example of interacting bosons in a Harper-Hofstadter optical-lattice ladder.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Despite the pristine abilities of analog quantum simulators to study quantum
dynamics, possibilities to detect currents are sparse. Here, we propose a
flexible non-invasive technique to measure currents in quantum many-body
systems by weakly coupling the system to an ancilla, followed by a measurement
of the ancilla population. We numerically benchmark the scheme at the example
of interacting bosons in a Harper-Hofstadter optical-lattice ladder, and
discuss potential experimental error sources. The highly flexible protocol can
be used with both hard-core and soft-core bosons as well as fermions, is easily
extendable to more general observables like current-current correlations, and
applies to other setups beyond cold atoms as we exemplify for the trapped-ion
platform.
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