Resource theory of dephasing estimation in multiqubit systems
Z Chen, X Hu - Physical Review A, 2023 - APS
We present a resource theory to investigate the power of a multqubit system as a probe in
the task of dephasing estimation. Our approach employs the quantum Fisher information …
the task of dephasing estimation. Our approach employs the quantum Fisher information …
On the extreme points of sets of absolulely separable and PPT states
Z Song, L Chen - arXiv preprint arXiv:2409.14347, 2024 - arxiv.org
The absolutely separable (resp. PPT) states remain separable (resp. positive partial
transpose) under any global unitary operation. We present a compact form of the extreme …
transpose) under any global unitary operation. We present a compact form of the extreme …
Breaking absolute separability with quantum switch
Absolute separable (AS) quantum states are those states from which it is impossible to
create entanglement, even under global unitary operations. It is known from the resource …
create entanglement, even under global unitary operations. It is known from the resource …
A resource theory of activity for quantum thermodynamics in the absence of heat baths
U Singh, G Chiribella - arXiv preprint arXiv:2304.08926, 2023 - arxiv.org
Active states, from which work can be extracted by time-dependent perturbations, are an
important resource for quantum thermodynamics in the absence of heat baths. Here we …
important resource for quantum thermodynamics in the absence of heat baths. Here we …