16 papers
Scaling-optimal purification of noisy qubit unitary channels
Ryotaro Niwa, Satoshi Yoshida, Koki Ono +5
We consider the problem of purifying noisy qubit unitary channels. Given the ability to apply an unknown qubit unitary channel followed by depolarizing noise, we aim to construct a…
Reliability of asymptotic work extraction
Kaito Watanabe, Bartosz Regula, Marco Tomamichel +1
Extracting work from quantum states is a fundamental task in quantum thermodynamics. Previous studies have primarily focused on determining the best achievable rate of work extract…
Asymptotic magic state distillation with almost linear rate
Koki Ehara, Ryuji Takagi
The overhead exponent -- characterizing the scaling of the number of noisy magic states with respect to the target distillation error -- has been a central quantity to benchmark ma…
Random dilation superchannel
Satoshi Yoshida, Ryotaro Niwa, Takeru Utsumi +2
We present a quantum circuit that implements the random dilation superchannel, transforming parallel queries of an unknown quantum channel into the same number of parallel queries…
Universal quantum resource distillation via composite generalised quantum Stein's lemma
Ludovico Lami, Bartosz Regula, Ryuji Takagi
The performance of quantum resource manipulation protocols, including key examples such as distillation of quantum entanglement, is measured in terms of the rate at which desired t…
Weak distillation of quantum resources
Shinnosuke Onishi, Oliver Hahn, Ryuji Takagi
Importance sampling based on quasi-probability decomposition is the backbone of many widely used techniques, such as error mitigation, circuit knitting, and, more generally, virtua…