Tag: Observable
Particle decays can act as weak quantum spin measurements
What the study found High-energy particle decays can realise informationally weak measurements of quantum spin, according to the authors. The abstract says decay kinematics act as continuous pointer variables with overlapping angular distributions that encode partial, non-projective information about the parent spin state. Why the authors say this matters The authors say this framework links…
Noisy quantum circuits can behave like shallow circuits
Theoretical analysis of how local noise restricts quantum circuits to shallow depths and prevents barren plateaus, enabling efficient classical simulation of observable expectation value estimation.
Proton resonance radii show an early-time plateau and threshold increase
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Theoretical investigation of nuclear charge radii in proton-unbound systems using complex-energy methods, revealing early-time plateau behavior and halolike threshold enhancement.
