تقرير
Sequential modular position and momentum measurements of a trapped ion mechanical oscillator
| العنوان: | Sequential modular position and momentum measurements of a trapped ion mechanical oscillator |
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| المؤلفون: | Flühmann, C., Negnevitsky, V., Marinelli, M., Home, J. P. |
| المصدر: | Phys. Rev. X 8, 021001 (2018) |
| سنة النشر: | 2017 |
| المجموعة: | Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Physics - Atomic Physics |
| الوصف: | The non-commutativity of position and momentum observables is a hallmark feature of quantum physics. However this incompatibility does not extend to observables which are periodic in these base variables. Such modular-variable observables have been suggested as tools for fault-tolerant quantum computing and enhanced quantum sensing. Here we implement sequential measurements of modular variables in the oscillatory motion of a single trapped ion, using state-dependent displacements and a heralded non-destructive readout. We investigate the commutative nature of modular variable observables by demonstrating no-signaling-in-time between successive measurements, using a variety of input states. In the presence of quantum interference, which we enhance using squeezed input states, measurements of different periodicity show signaling-in-time. The sequential measurements allow us to extract two-time correlators for modular variables, which we use to violate a Leggett-Garg inequality. The experiments involve control and coherence of multi-component superpositions of up to 8 coherent, squeezed or Fock state wave-packets. Signaling-in-time as well as Leggett-Garg inequalities serve as efficient quantum witnesses which we probe here with a mechanical oscillator, a system which has a natural crossover from the quantum to the classical regime. Comment: 6 pages, 3 figures and supplemental information |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevX.8.021001 |
| URL الوصول: | http://arxiv.org/abs/1709.10469 |
| رقم الأكسشن: | edsarx.1709.10469 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevX.8.021001 |
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