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Spin-motion entanglement and state diagnosis with squeezed oscillator wavepackets
Hsiang-Yu Lo1, Daniel Kienzler1, Ludwig de Clercq1
1Institute for Quantum Electronics, Eidgenössische Technische Hochschule Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.
Nature
|May 22, 2015
Summary
Researchers created Schrödinger
Area of Science:
- Quantum physics
- Atomic physics
- Quantum optics
Background:
- Mesoscopic superpositions mimic Schrödinger's cat.
- Previous experiments used spatially separated coherent states.
Purpose of the Study:
- Demonstrate superpositions of squeezed wavepackets.
- Utilize internal-state-dependent forces on trapped ions.
Main Methods:
- Initialized a trapped ion in a squeezed vacuum state.
- Applied an internal-state-dependent force.
- Monitored spin-motion entanglement.
- Verified oscillator number state evolution.
Main Results:
- Generated superpositions of squeezed wavepackets.
- Observed differences in displacements along squeezed/anti-squeezed axes.
- Achieved coherent revivals after significant wavepacket separation.
Conclusions:
- Successfully created and characterized squeezed wavepacket superpositions.
- Demonstrated potential for quantum metrology and continuous-variable quantum information processing.
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