12 papers
Collective-dissipation-induced dark and metastable-like states for enhanced quantum battery performance
Achraf Khoudiri, Asghar Ullah, Abderrahim El Allati +1
We investigate the role of symmetry-protected dark states and metastable-like frozen states in the autonomous charging dynamics of open quantum batteries described by a transverse-…
Topological Engine Monitor: Persistent Homology-Based Fault Detection in Finite-Time Quantum Engines
Miraç Kerem Maden, Asghar Ullah, Baris Coskunuzer +1
The reliable operation of finite-time quantum heat engines is fundamentally limited by control imperfections that induce nonadiabatic phase accumulation and quantum friction, degra…
Optimizing quantum sensing networks via genetic algorithms and deep learning
Asghar Ullah, Ãzgür E. MüstecaplıoÄlu, Matteo G. A. Paris
We investigate the optimization of graph topologies for quantum sensing networks designed to estimate weak magnetic fields. The sensors are modeled as spin systems governed by a tr…
Enhancing low-temperature quantum thermometry and magnetometry via quadratic interactions in optomechanical-like systems
Asghar Ullah, Ãzgür E. MüstecaplıoÄlu
Standard optomechanical sensors operating in the low-temperature regime often face fundamental precision limits imposed by vacuum fluctuations. Here, we demonstrate that moving bey…
Harnessing Floquet dynamics for selective metrology in few-qubit systems
Asghar Ullah, Hasan Mermer, Melih Ãzkurt +2
Periodically driven quantum systems can function as highly selective parameter filters. We demonstrate this capability in a finite-size, three-qubit system described by the transve…
Configuration-dependent precision in magnetometry and thermometry using multi-qubit quantum sensors
Asghar Ullah, Ãzgür E. MüstecaplıoÄlu, Matteo G. A. Paris
We study the performance of quantum sensors composed of four qubits arranged in different geometries for magnetometry and thermometry. The qubits interact via the transverse-field…