9 papers · 1 filter
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…
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…
Decoherence across phase-space scales: From compass states to general quantum states
Naeem Akhtar, Jia-Xin Peng, Tan Hailin +2
Environmental decoherence occurs when a quantum system interacts with its surroundings, progressively reducing quantum interference and coherence, complicating the preservation of…
Enhancement in temperature sensing of a reservoir by Kerr-nonlinear resonator
Naeem Akhtar, Jia-Xin Peng, Xiaosen Yang +1
The challenge of developing high-precision temperature sensors is an important issue that has recently received a lot of attention. In this work, we introduce an estimation techniq…
Multicomponent cat states with sub-Planckian structures and their optomechanical analogues
Tan Hailin, Naeem Akhtar, Gao Xianlong
We investigate the superposition of coherent states, emphasizing quantum states with distinct Wigner phase-space features relevant to quantum information applications. In this stud…
Sub-shot-noise sensitivity via superpositions of two deformed kitten states
Naeem Akhtar, Xiaosen Yang, Jia-Xin Peng +3
In the present work we explore nonclassical effects in the phase space of two superposed kitten states induced by photon addition and subtraction operations applied in different se…