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Detecting vacuum entanglement in a linear ion trap
A Retzker1, J I Cirac, B Reznik
1School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel-Aviv 69978, Israel.
Physical Review Letters
|March 24, 2005
Summary
We present a novel method to detect ground-state entanglement in trapped ions. This technique swaps entanglement to internal ion states using laser pulses, enabling entanglement without gate operations.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Ion Trapping
Background:
- Entanglement is crucial for quantum computing and communication.
- Detecting and generating entanglement in multi-particle systems remains a challenge.
- Trapped ions are promising qubits for quantum technologies.
Purpose of the Study:
- To propose and investigate a new method for detecting ground-state entanglement in trapped ion chains.
- To demonstrate entanglement swapping to internal ion states.
- To enable entanglement generation without direct gate operations.
Main Methods:
- Utilizing laser pulses to couple internal and motional degrees of freedom in trapped ions.
- Implementing entanglement swapping from collective states to specific ion pairs.
- Proposing a proof-of-principle experiment with two trapped ions.
Main Results:
- Demonstrated a method to swap entanglement to the internal levels of two ions.
- Showed that entanglement can be detected without performing direct gate operations.
- Confirmed the feasibility of the proposed method with current experimental technology.
Conclusions:
- The proposed method offers a viable route for detecting ground-state entanglement in trapped ion systems.
- This technique simplifies entanglement generation, bypassing the need for complex gate operations.
- The experimental feasibility suggests near-term applications in quantum information processing.