418 research outputs found
Leggett-Garg inequalities for multitime processe
We study some aspects of the Leggett-Garg inequalities by using the
operator-state formalism for multitime processes. A new type of temporal
quantum state, which we call process states, is introduced to investigate the
Leggett-Garg inequalities and their violations. We find the sufficient
conditions on process states for the Leggett-Garg inequalities to hold, in line
with the no-signaling in time conditions. Based on these new conditions on
process states, we find a new way of characterizing the environmental
influences on the violation of Leggett-Garg inequalities through the structure
of process states.Comment: 11 page
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