Characterization of an operational quantum resource in a critical many-body system

Understand

Quantum many-body systems have been extensively studied from the perspective of quantum technology, and conversely, critical phenomena in such systems have been characterized by operationally relevant resources like entanglement.

• In this paper, we investigate robustness of magic (RoM), the resource in magic state injection based quantum computation schemes in the context of the transverse field anisotropic XY model.
• We show that the the factorizable ground state in the symmetry broken configuration is composed of an enormous number of highly magical $H$ states.
• We find the existence of a point very near the quantum critical point where magic contained explicitly in the correlation between two distant qubits attains a sharp maxima.