Scalable quantum logic spectroscopy

• URL: http://arxiv.org/abs/2207.11768v1
• Date: Sun, 24 Jul 2022 16:36:05 GMT
• Title: Scalable quantum logic spectroscopy
• Authors: Kaifeng Cui, Jose Valencia, Kevin T. Boyce, David R. Leibrandt and David B. Hume
• Abstract summary: In quantum logic spectroscopy (QLS), one species of trapped ion is used as a sensor to detect the state of an otherwise inaccessible ion species. We develop a new technique based on a Schr"odinger cat interferometer to address the problem of scaling QLS to larger ion numbers.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In quantum logic spectroscopy (QLS), one species of trapped ion is used as a sensor to detect the state of an otherwise inaccessible ion species. This extends precision measurements to a broader class of atomic and molecular systems for applications like atomic clocks and tests of fundamental physics. Here, we develop a new technique based on a Schr\"{o}dinger cat interferometer to address the problem of scaling QLS to larger ion numbers. We demonstrate the basic features of this method using various combinations of $^{25}\text{Mg}^+$ logic ions and $^{27}\text{Al}^+$ spectroscopy ions. We observe higher detection efficiency by increasing the number of $^{25}\text{Mg}^+$ ions. Applied to multiple $^{27}\text{Al}^+$, this method will improve the stability of high-accuracy optical clocks and could enable Heisenberg-limited QLS.

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