25 papers
Phase information beyond entanglement sudden death in coherence-to-entanglement conversion under post-gate noise
Asad Ali, Hashir Kuniyil, M. T Rahim +1
An ideal CNOT maps the phase of a coherent qubit onto the coherence between and of a two-qubit state, producing an output that carries both entanglement and e…
Detection-resolution limits of large-momentum-transfer atom gravimetry
Asad Ali, Saif Al-Kuwari
Large momentum transfer (LMT) enhances the gravitational phase of a light-pulse atom interferometer by a factor , while mirrorless operation with momentum-resolved detection can…
Locally Passive, Globally Charged Quantum Batteries: Coherence-Controlled Work and the Robustness of the Stored Charge
Asad Ali, Saif Al-kuwari, James Q. Quach
A solvable charger--battery model is introduced in which quantum coherence controls both where a quantum battery's charge is stored and how robustly it survives noise. Charging con…
Analytic Benchmarks for Coherence-to-Entanglement Conversion under Post-Gate Noise in CNOT-Based Protocols
Asad Ali, H. Kuniyil, M. I. Hussain +3
Coherence-to-entanglement conversion transforms single-qubit superposition into a practical two-qubit resource, but noise limits this process in near-term quantum hardware. We deri…
Reservoir-independent lossless charging and protected storage of an open quantum battery
Asad Ali, H. Kuniyil, M. I Hussain +3
A quantum battery charged through a lossy intermediate state faces a structural trade-off between charging speed and dissipation. We show that an exact algebraic cancellation remov…
Bright-state source cancellation in dissipative shortcut Raman atom optics
Asad Ali, Saif Al-Kuwari, M. I. Hussain +3
Spontaneous Raman scattering limits shortcut-assisted atom optics, but its microscopic origin is obscured once the lossy excited state is adiabatically eliminated. We organize the…