6 papers
Quantum Fisher Information as the Speed Limit for Multipartite Entanglement
Zain H. Saleem, Da-Wei Luo, Anjala M. Babu +3
We derive a universal upper bound on the speed of multipartite entanglement generation. For arbitrary differentiable pure multipartite states undergoing parameter-dependent evoluti…
Two-qubit charger-battery system subject to weak, continuous measurements with quantum point contacts
Banumathy Manickam, Anil Shaji
Quantum batteries modeled as two-qubit systems coupled to Markovian thermal reservoirs have been shown to benefit from measurement-assisted charging, where projective measurements…
Quantum Fisher Information and the Curvature of Entanglement
Zain H. Saleem, Anil Shaji, Anjala M Babu +4
We explore the relationship between quantum Fisher information (QFI) and the negative of the second derivative of concurrence with respect to the coupling between two qubits, refer…
Enhanced quantum sensing mediated by a cavity in open systems
Quinn Langfitt, Zain H. Saleem, Tian Zhong +2
We simulate the dynamics of systems with = 1-20 qubits coupled to a cavity in order to assess their potential for quantum metrology of a parameter in the open systems limit. Th…
Achieving the Heisenberg limit with Dicke states in noisy quantum metrology
Zain H. Saleem, Michael Perlin, Anil Shaji +1
Going beyond the standard quantum limit in noisy quantum metrology is an important and challenging task. Here we show how Dicke states can be used to surpass the standard quantum l…
Optimal time for sensing in open quantum systems
Zain H. Saleem, Anil Shaji, Stephen K. Gray
We study the time-dependent quantum Fisher information (QFI) in an open quantum system satisfying the Gorini-Kossakowski-Sudarshan-Lindblad master equation. We also study the dynam…