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Resource-Efficient Dissipative Entanglement of Two Trapped-Ion Qubits
Daniel C Cole1, Stephen D Erickson1,2, Giorgio Zarantonello1,2
1National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA.
Physical Review Letters
|March 11, 2022
Summary
Researchers developed a faster, higher-fidelity method for creating entangled states in trapped-ion qubits using dissipation. This simplified approach eliminates auxiliary ions and achieves high fidelity entanglement generation.
Area of Science:
- Quantum Information Science
- Atomic Physics
- Quantum Computing
Background:
- Entanglement is crucial for quantum information processing.
- Dissipative methods offer a pathway to generate entangled states.
Purpose of the Study:
- To demonstrate a simplified, high-fidelity method for dissipative entanglement generation in trapped-ion qubits.
- To improve speed and reduce complexity compared to previous methods.
Main Methods:
- Utilized a simplified dissipative process for two trapped-ion qubits.
- Eliminated the need for auxiliary ions in the entanglement generation protocol.
Main Results:
- Achieved dissipative entanglement generation of a singlet state in approximately 7 milliseconds.
- Obtained a high fidelity of 0.949(4) for the entangled state.
- Identified photon scattering as the primary source of infidelity.
Conclusions:
- The demonstrated method offers a faster and more efficient route to dissipative entanglement.
- Photon scattering is a key error to address for further fidelity improvements.
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