Practical and Efficient Verification of Entanglement with Incomplete Measurement Settings
Prof. Joonwoo Bae - School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), South Korea
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2025-12-17 11:00:00 ~
2025-12-17 12:00:00See event details for additional info.
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F104, Gongguan Campus, NTNU
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Practical and Efficient Verification of Entanglement with Incomplete Measurement Settings
Prof. Joonwoo Bae - School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), South Korea
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DATE |
2025-12-17 |
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11:00-12:00 |
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PLACE |
F104, Gongguan Campus, NTNU |
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FIELD |
Quantum Information Science |
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SPEAKER |
Prof. Joonwoo Bae - School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), South Korea |
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TITLE |
Practical and Efficient Verification of Entanglement with Incomplete Measurement Settings |
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ABSTRACT |
A measurement setting for quantum state identification, namely tomographically complete measurements, can verify all properties of quantum states; once a state is verified, one can determine its properties, such as entanglement, purity, fidelity, correlation functions, etc. A fraction of the measurement results, yet insufficient to verify a state, may reveal specific properties of a state. In this work, we establish a practical, efficient framework for verifying entangled states when a measurement setting is provided. We construct observables, called entanglement witnesses (EWs), that can distinguish entangled states from separable ones from tomographically incomplete measurements. We show that estimating a few Pauli observables can construct many EWs. We also present a proof-of-principle demonstration of detecting entangled states with photon-polarization qubits. Our results find the maximal usefulness of an incomplete measurement setting for detecting entangled states. |
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