Rostock 2019 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 50: Quantum Information (Concepts and Methods) IV

Q 50.2: Talk

Thursday, March 14, 2019, 14:30–14:45, S HS 001 Chemie

Noisy quantum states and fidelity of measurement based quantum computation — •Mariami Gachechiladze and Otfried Gühne — University of Siegen

Measurement-based quantum computation (MBQC) is the model of a quantum computation, where a multipartite entangled resource state is prepared in advance and a computation is performed via local measurements on this state. Most conventionally cluster states, subclasses of graph states are used as resource states and then the corresponding MBQC protocols are derived. However, it is not fully understood what makes cluster states or some other specific states useful resources. In addition, very little in known for the cases when there is some noise presented in a resource state.

Given a multipartite entangled noisy quantum state as a resource state, we study its usefulness for MBQC. We connect entanglement properties of these quantum resource states with the optimal fidelities of quantum gates implemented in MBQC model. We characterize entanglement presented in the states, which give better fidelity than the optimal classical protocol would achieve.