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quant-ph2026
Operational Concealment of Measurement Incompatibility by Quantum Channels: Rank Loss versus Contraction
Mohd Asad Siddiqui, Zizhu Wang
Quantum measurements can remain incompatible yet become impossible to certify when all probe states first pass through a quantum channel. We formulate this loss of certifiability a…
quant-ph2026
Exact Quantum Maxima of the -Cycle Overlap Inequalities
Mohd Asad Siddiqui
We extend the three-state overlap analysis to determine the exact quantum maximum over finite-dimensional pure-state realizations of the -cycle overlap inequalities, $S_n^{\max}…
quant-ph2026
Complementarity Beyond Definite Causal Order
Mohd Asad Siddiqui, Md Qutubuddin, Tabish Qureshi
Wave--particle duality is a cornerstone of quantum mechanics, traditionally formulated under definite causal order. We investigate how complementarity is modified when the temporal…