5 papers · 1 filter
Quantum and classical ergotropy from relative entropies
Akira Sone, Sebastian Deffner
The quantum ergotropy quantifies the maximal amount of work that can be extracted from a quantum state without changing its entropy. Given that the ergotropy can be expressed as th…
Sub-Quantum Fisher Information
M. Cerezo, Akira Sone, Jacob L. Beckey +1
The Quantum Fisher Information (QFI) plays a crucial role in quantum information theory and in many practical applications such as quantum metrology. However, computing the QFI is…
Cost Function Dependent Barren Plateaus in Shallow Parametrized Quantum Circuits
M. Cerezo, Akira Sone, Tyler Volkoff +2
Variational quantum algorithms (VQAs) optimize the parameters of a parametrized quantum circuit to minimize a cost function . While VQAs may enable practical…
Nonclassical correlations for quantum metrology in thermal equilibrium
Akira Sone, Quntao Zhuang, Changhao Li +2
Nonclassical correlations beyond entanglement might provide a resource in quantum information tasks, such as quantum computation or quantum metrology. Quantum discord is a measure…
Quantifying precision loss in local quantum thermometry via diagonal discord
Akira Sone, Quntao Zhuang, Paola Cappellaro
When quantum information is spread over a system through nonclassical correlation, it makes retrieving information by local measurements difficult---making global measurement neces…