Achieving Heisenberg limit under General Markov Noise without Ancilla

Published 19 Mar 2019 in quant-ph | (1903.07888v1)

Abstract: We consider probing qubits infested by general Makovian noise. It can be shown that one can restore Heisenberg limit (HL) via full and fast control without any ancilla, as long as the Hamiltonian of the system has non-vanishing component perpendicular to the noise

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