Trapped-ion experiment reveals multi-Mpemba effect with multiple trajectory crossings, explained by a phase diagram combining SDM overlap and initial relaxation speed from the fastest decay mode.
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A quantum speed limit for observables is formulated from the trace-norm asymmetry of the time-dependent state, observable through weak measurements and bounding the quantum Fisher information for the conjugate parameter.
High-order squeezed states can deliver better metrological precision than squeezed vacuum at equal occupations, with the advantage depending on the state family and sensitive to dephasing noise.
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Observation of quantum multi-Mpemba effect in a trapped-ion system
Trapped-ion experiment reveals multi-Mpemba effect with multiple trajectory crossings, explained by a phase diagram combining SDM overlap and initial relaxation speed from the fastest decay mode.
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Quantum speed limit for observables from quantum asymmetry
A quantum speed limit for observables is formulated from the trace-norm asymmetry of the time-dependent state, observable through weak measurements and bounding the quantum Fisher information for the conjugate parameter.
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Quantum metrological advantage of high-order squeezed states
High-order squeezed states can deliver better metrological precision than squeezed vacuum at equal occupations, with the advantage depending on the state family and sensitive to dephasing noise.