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quant-ph2026
Maximal Fisher Budget Forces Blind Directions in Bipartite Collective SU(d) Metrology
Tariq Aziz, Naeem Akhtar, Dong Wang +1
For pure two-qudit probes used in a single fixed setting to estimate a common SU(d) transformation, maximal total Fisher sensitivity and full local identifiability are mutually exc…
quant-ph2026
Finer sub-Planck structures and displacement sensitivity of SU(1,1) circular states
Naeem Akhtar, Jia-Xin Peng, Tariq Aziz +2
Quantum states with sub-Planck features exhibit sensitivity to phase-space displacements beyond the standard quantum limit, making them useful for quantum metrology. In the context…