Specific term required. The classical shadow protocol requires that an ensemble of unitary transformations define a set of measurements that is “complete” with respect to this technique, meaning that they comprise a “quorum” that forms an operator basis. A “quantum” form of this technique reconstructs a quantum state from measurements on an ensemble of identical quantum states. The inverse (*) Radon transform performs “reconstruction” from this technique, which is the task of estimating a multidimensional system from projections. The most common use of Hounsfield units is to report results from a form of this technique that rotates an X-ray tube around a patient. For 10 points, name this technique that involves imaging via sections and is “computed” in a CT scan. ■END■
ANSWER: tomography [accept quantum tomography or computed axial tomography scan; prompt on CT scan or CAT scan; prompt on scan by asking “what technique is employed in that scan?”]
<Daniel Hothem and David Bass, Physics>
= Average correct buzz position