175 citations · 1.2k across the 63 of their papers we have counts for
6 papers · 1 filter
Obtain -state from three-qubit -state on rate 1
Nengkun Yu, Cheng Guo, Runyao Duan
In this paper, we study the entanglement transformation rate between multipartite states under stochastic local operations and classical communication (SLOCC). Firstly, we show tha…
Reachability Probabilities of Quantum Markov Chains
Shenggang Ying, Yuan Feng, Nengkun Yu +1
This paper studies three kinds of long-term behaviours, namely reachability, repeated reachability and persistence, of quantum Markov chains (qMCs). As a stepping-stone, we introdu…
Orbit Problem Revisited
Taolue Chen, Xiaoming Sun, Nengkun Yu
In this letter, we revisit the {\em orbit problem}, which was studied in \cite{HAR69,SHA79,KL86}. In \cite{KL86}, Kannan and Lipton proved that this problem is decidable in polynom…
Quantum Information-Flow Security: Noninterference and Access Control
Mingsheng Ying, Yuang Feng, Nengkun Yu
Quantum cryptography has been extensively studied in the last twenty years, but information-flow security of quantum computing and communication systems has been almost untouched i…
Optimal simulation of three-qubit gates
Nengkun Yu, Mingsheng Ying
In this paper, we study the optimal simulation of three-qubit unitary by using two-qubit gates. First, we give a lower bound on the two-qubit gates cost of simulating a multi-qubit…
Five Two-Qubit Gates Are Necessary for Implementing Toffoli Gate
Nengkun Yu, Runyao Duan, Mingsheng Ying
In this paper, we settle the long-standing open problem of the minimum cost of two-qubit gates for simulating a Toffoli gate. More precisely, we show that five two-qubit gates are…