Dynamical maps beyond Markovian regime

D Chruściński - Physics Reports, 2022 - Elsevier
Quantum dynamical maps provide suitable mathematical representation of quantum
evolutions. When representing quantum states by density operators, the evident …

Entanglement asymmetry study of black hole radiation

F Ares, S Murciano, L Piroli, P Calabrese - Physical Review D, 2024 - APS
Hawking's discovery that black holes can evaporate through radiation emission has posed a
number of questions that with time became fundamental hallmarks for a quantum theory of …

Quantum secure direct communication with private dense coding using a general preshared quantum state

J Wu, GL Long, M Hayashi - Physical Review Applied, 2022 - APS
We study quantum secure direct communication using a general preshared quantum state
and a generalization of dense coding. In this scenario, Alice is allowed to apply a unitary …

Optimal resource cost for error mitigation

R Takagi - Physical Review Research, 2021 - APS
One of the central problems for near-term quantum devices is to understand their ultimate
potential and limitations. We address this problem in terms of quantum error mitigation by …

Correlation in catalysts enables arbitrary manipulation of quantum coherence

R Takagi, N Shiraishi - Physical Review Letters, 2022 - APS
Quantum resource manipulation may include an ancillary state called a catalyst, which aids
the transformation while restoring its original form at the end, and characterizing the …

Entanglement asymmetry in the critical XXZ spin chain

M Lastres, S Murciano, F Ares… - Journal of Statistical …, 2025 - iopscience.iop.org
We study the explicit breaking of a SU (2) symmetry to a U (1) subgroup employing the
entanglement asymmetry, a recently introduced observable that measures how much …

Arbitrary amplification of quantum coherence in asymptotic and catalytic transformation

N Shiraishi, R Takagi - Physical Review Letters, 2024 - APS
Quantum coherence is one of the fundamental aspects distinguishing classical and quantum
theories. Coherence between different energy eigenstates is particularly important, as it …

Application of the resource theory of channels to communication scenarios

R Takagi, K Wang, M Hayashi - Physical Review Letters, 2020 - APS
We introduce a resource theory of channels relevant to communication via quantum
channels, in which the set of constant channels—useless channels for communication tasks …

Operational interpretation of quantum fisher information in quantum thermodynamics

I Marvian - Physical Review Letters, 2022 - APS
In the framework of quantum thermodynamics preparing a quantum system in a general
state requires the consumption of two distinct resources, namely, work and energetic …

Wigner-Araki-Yanase theorem for continuous and unbounded conserved observables

Y Kuramochi, H Tajima - Physical review letters, 2023 - APS
The Wigner-Araki-Yanase (WAY) theorem states that additive conservation laws imply the
commutativity of exactly implementable projective measurements and the conserved …