61 citations · 187 across the 14 of their papers we have counts for
14 papers
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…
Floquet engineering of point-gapped topological superconductors
Xiang Ji, Hao Geng, Naeem Akhtar +1
Non-Hermitian systems exhibit two distinct topological classifications based on their gap structure: line-gap and point-gap topologies. Although point-gap topology is intrinsic to…
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…
Compasslike states in a thermal reservoir and fragility of their nonclassical features
Naeem Akhtar, Xiaosen Yang, Muhammad Asjad +3
Superposed photon-added and photon-subtracted squeezed-vacuum states exhibit sub-Planck phase-space structures and metrological potential similar to the original compass states (su…
Enhanced entanglement and controlling quantum steering in a Laguerre-Gaussian cavity optomechanical system with two rotating mirrors
Amjad Sohail, Zaheer Abbas, Rizwan Ahmed +3
Gaussian quantum steering is a type of quantum correlation in which two entangled states exhibit asymmetry. We present an efficient theoretical scheme for controlling quantum steer…
A rotational-cavity optomechanical system with two revolving cavity mirrors: optical response and fast-slow light mechanism
Amjad Sohail, Rameesa Arif, Naeem Akhtar +4
We investigate the optical behavior of a single Laguerre-Gaussian cavity optomechanical system consisting of two mechanically rotating mirrors. We explore the effects of various ph…
Sub-Planck structures and sensitivity of the superposed photon-added or photon-subtracted squeezed-vacuum states
Naeem Akhtar, Jizhou Wu, Jia-Xin Peng +2
The Wigner function of the compass state (a superposition of four coherent states) develops phase-space structures of dimension much less than the Planck scale, which are crucial i…
Sub-Planck phase-space structure and sensitivity for SU(1,1) compass states
Naeem Akhtar, Barry C. Sanders, Gao Xianlong
We investigate the sub-Planck-scale structures associated with the SU(1,1) group by establishing that the Planck scale on the hyperbolic plane can be considered as the inverse of t…
Sub-Planck structures: Analogies between the Heisenberg-Weyl and SU(2) groups
Naeem Akhtar, Barry C. Sanders, Carlos Navarrete-Benlloch
Coherent-state superpositions are of great importance for many quantum subjects, ranging from foundational to technological, e.g., from tests of collapse models to quantum metrolog…
Quantum tetrachotomous states: Superposition of four coherent states on a line in phase space
Namrata Shukla, Naeem Akhtar, Barry C. Sanders
The well studied quantum optical Schrödinger cat state is a superposition of two distinguishable states, with quantum coherence between these macroscopically distinguishable states…