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Related Experiment Video

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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps

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Published on: August 17, 2017

Bosonic Josephson junction controlled by a single trapped ion.

R Gerritsma¹, A Negretti, H Doerk

¹Institut für Physik, Johannes Gutenberg-Universität Mainz, D-55099 Mainz, Germany. rene.gerritsma@uni-mainz.de

Physical Review Letters

|September 26, 2012

Summary

We show how a single trapped ion can control a bosonic Josephson junction, enabling precise measurements and the creation of large-scale entanglement between the ion and atom systems.

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Area of Science:

Quantum mechanics
Atomic physics
Condensed matter physics

Background:

Bosonic Josephson junctions (BJJs) are crucial for quantum information processing.
Trapped ions offer high precision control in quantum systems.
Interfacing ions with neutral atom systems is a key challenge.

Purpose of the Study:

To theoretically investigate the properties of a double-well BJJ coupled to a single trapped ion.
To explore the control of interwell coupling via the ion's internal state.
To demonstrate the generation of mesoscopic entanglement and precise interaction measurements.

Main Methods:

Theoretical modeling of a double-well BJJ coupled to a single trapped ion.
Calculation of interwell coupling rates and state-dependent coupling.
Analysis of self-trapping and tunneling regimes based on ion state.

Main Results:

Ion's internal state precisely controls the coupling between BJJ wells.
Achieved interwell coupling rates of hundreds of Hz.
State-dependent coupling rates of tens of Hz demonstrated.
Ability to induce self-trapping or tunneling regimes by controlling the ion state.

Conclusions:

A single trapped ion can effectively control a bosonic Josephson junction.
This system allows for high-precision measurement of ion-atom interactions.
Enables the generation of large-scale ion-atomic wave packet entanglement with current technology.