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When measuring quantum spins at two or more different times, the latermeasurements are affected by measurement backaction occurring due to theearlier measurements. This makes the measurement of temporal quantumcorrelation functions challenging. In this paper, I propose a measurementprotocol that mitigates the effect of measurement backaction by exploiting spinselection rules. I show that, under suitable conditions, the effect ofmeasurement backaction on two-time quantum correlations becomes negligible whenprobing a system consisting of spins with large spin quantum numbers $l\gg s$by coupling it to a spin-$s$ ancilla degree of freedom. A potential applicationof such a measurement protocol is the probing of an array of Bose-Einsteincondensates by light.

Ancilla-assisted probing of temporal quantum correlations of large spins