【摘 要】
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Quantum state tomograpy is a primitive of various quantum information processing tasks, such as quantum computation, communication, and cryptography [1-3].The precision limit in quantum state estimati
【机 构】
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Key Laboratory of Quantum Information, USTC, CAS, Hefei 230026, P.R.China
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Quantum state tomograpy is a primitive of various quantum information processing tasks, such as quantum computation, communication, and cryptography [1-3].The precision limit in quantum state estimation is of great interest not only to practical applications but also to foundational studies.However,little is known about this subject in the multiparameter setting even theoretically.
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