26 citations · 47 across the 5 of their papers we have counts for
11 papers · 1 filter
Compression for Qubit Clocks
Yuxiang Yang, Giulio Chiribella, Masahito Hayashi
Two-Ievel (qubit) clock systems are often used to perform precise measurement of time. In this work, we propose a compression protocol for identically prepared states of qubit…
Quantum metrology for non-Markovian processes
Anian Altherr, Yuxiang Yang
Quantum metrology is a rapidly developing branch of quantum technologies. While various theories have been established on quantum metrology for Markovian processes, i.e., quantum c…
Optimal universal programming of unitary gates
Yuxiang Yang, Renato Renner, Giulio Chiribella
A universal quantum processor is a device that takes as input a (quantum) program, containing an encoding of an arbitrary unitary gate, and a (quantum) data register, on which the…
Ultimate limit on time signal generation
Yuxiang Yang, Renato Renner
The generation of time signals is a fundamental task in science. Here we study the relation between the quality of a time signal and the physics of the system that generates it. Ac…
Communication Cost of Quantum Processes
Yuxiang Yang, Giulio Chiribella, Masahito Hayashi
A common scenario in distributed computing involves a client who asks a server to perform a computation on a remote computer. An important problem is to determine the minimum amoun…
Quantum Metrology with Indefinite Causal Order
Xiaobin Zhao, Yuxiang Yang, Giulio Chiribella
We address the study of quantum metrology enhanced by indefinite causal order, demonstrating a quadratic advantage in the estimation of the product of two average displacements in…