Zusammenfassung: | |
Optical clocks based on ensembles of trapped ions promise record frequency accuracy with good short-term stability. Most suitable ion species lack closed transitions, so the clock signal must be read out indirectly by transferring the quantum state of the clock ions to cotrapped logic ions of a different species. Existing methods of quantum logic readout require a linear overhead in either time or the number of logic ions. Here we describe a quantum algorithmic readout whose overhead scales logarithmically with the number of clock ions in both of these respects. The scheme allows a quantum nondemolition readout of the number of excited clock ions using a single multispecies gate operation which can also be used in other areas of ion trap technology such as quantum information processing, quantum simulations, metrology, and precision spectroscopy. © 2016 American Physical Society.
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Lizenzbestimmungen: | Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
Publikationstyp: | Article |
Publikationsstatus: | publishedVersion |
Erstveröffentlichung: | 2016 |
Schlagwörter (englisch): | Algorithms, Clocks, Computer circuits, Ions, Quantum chemistry, Quantum optics, Reconfigurable hardware, Trapped ions, Closed transitions, Frequency accuracy, Optical clocks, Precision spectroscopy, Quantum non-demolition, Quantum simulations, Quantum-information processing, Short term stability, Quantum theory |
Fachliche Zuordnung (DDC): | 530 | Physik |
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