Estimating observables by state preparation and fixed measurements

Joonwoo Bae

doi:10.1117/12.3028405

4 October 2024 Estimating observables by state preparation and fixed measurements

Joonwoo Bae

Proceedings Volume PC13148, Quantum Communications and Quantum Imaging XXII; PC131480C (2024) https://doi.org/10.1117/12.3028405
Event: Optical Engineering + Applications, 2024, San Diego, California, United States

Abstract

It is shown that a fixed measurement setting, e.g., a measurement in the computational basis, can detect all entangled states by preparing multipartite quantum states, called network states. We present network states for both cases to construct decomposable entanglement witnesses (EWs) equivalent to the partial transpose criteria and also non-decomposable EWs that detect undistillable entangled states beyond the partial transpose criteria. Entanglement detection by state preparation can be extended to multipartite states such as graph states, a resource for measurement-based quantum computing. Our results readily apply to a realistic scenario, for instance, an array of superconducting qubits. neutral atoms, or photons, in which the preparation of a multipartite state and a fixed measurement are experimentally feasible.

Conference Presentation

Citation Download Citation

Joonwoo Bae "Estimating observables by state preparation and fixed measurements", Proc. SPIE PC13148, Quantum Communications and Quantum Imaging XXII, PC131480C (4 October 2024); https://doi.org/10.1117/12.3028405

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