Universal sampling lower bounds for quantum error mitigation

R Takagi, H Tajima, M Gu - Physical Review Letters, 2023‏ - APS
Numerous quantum error-mitigation protocols have been proposed, motivated by the critical
need to suppress noise effects on intermediate-scale quantum devices. Yet, their general …

No second law of entanglement manipulation after all

L Lami, B Regula - Nature Physics, 2023‏ - nature.com
Many fruitful analogies have emerged between the theories of quantum entanglement and
thermodynamics, motivating the pursuit of an axiomatic description of entanglement akin to …

Quantum NETwork: from theory to practice

K Fang, J Zhao, X Li, Y Li, R Duan - Science China Information Sciences, 2023‏ - Springer
The quantum internet is envisioned as the ultimate stage of the quantum revolution, which
surpasses its classical counterpart in various aspects, such as the efficiency of data …

Probabilistic transformations of quantum resources

B Regula - Physical Review Letters, 2022‏ - APS
The difficulty in manipulating quantum resources deterministically often necessitates the use
of probabilistic protocols, but the characterization of their capabilities and limitations has …

Virtual quantum resource distillation: General framework and applications

R Takagi, X Yuan, B Regula, M Gu - Physical Review A, 2024‏ - APS
We develop the general framework of virtual resource distillation, an alternative distillation
strategy proposed in Phys. Rev. Lett. 132, 050203 (2024) 10.1103/PhysRevLett …

Virtual quantum resource distillation

X Yuan, B Regula, R Takagi, M Gu - Physical Review Letters, 2024‏ - APS
Distillation, or purification, is central to the practical use of quantum resources in noisy
settings often encountered in quantum communication and computation. Conventionally …

Lower Bound for the Count Via Unitary Stabilizer Nullity

J Jiang, X Wang - Physical Review Applied, 2023‏ - APS
We introduce magic measures to quantify the nonstabilizerness of multiqubit quantum gates
and establish lower bounds on the T count for fault-tolerant quantum computation. First, we …

Every quantum helps: Operational advantage of quantum resources beyond convexity

K Kuroiwa, R Takagi, G Adesso, H Yamasaki - Physical Review Letters, 2024‏ - APS
Identifying what quantum-mechanical properties are useful to untap a superior performance
in quantum technologies is a pivotal question. Quantum resource theories provide a unified …

Real quantum operations and state transformations

TV Kondra, C Datta, A Streltsov - New Journal of Physics, 2023‏ - iopscience.iop.org
Resource theory of imaginarity provides a useful framework to understand the role of
complex numbers, which are essential in the formulation of quantum mechanics, in a …

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 …