54 citations · 134 across the 11 of their papers we have counts for
11 papers
Exact Incompatibility-Breaking Criterion for Unital Qubit Channels
Yujie Zhang
We study when a noisy qubit channel renders all positive-operator-valued measures (POVMs) jointly measurable. For every unital qubit channel, we derive the exact incompatibility-br…
Temporally localized quantum operations on continuous-wave thermal light
Yunkai Wang, Yujie Zhang, Virginia O. Lorenz
Previous work showed that thermal light with a blackbody spectrum cannot be decomposed into a mixture of independent localized pulses. However, we find that in the weak-source limi…
Exact Steering Bound for Two-Qubit Werner States
Yujie Zhang, Eric Chitambar
We investigate the relationship between projective measurements and positive operator-valued measures (POVMs) in the task of quantum steering. A longstanding open problem in the fi…
Astronomical interferometry using continuous variable quantum teleportation
Yunkai Wang, Yujie Zhang, Virginia O. Lorenz
We propose a method to build an astronomical interferometer using continuous variable quantum teleportation to overcome the transmission loss between distant telescopes. The scheme…
Cost of Simulating Entanglement in Steering Scenario
Yujie Zhang, Jiaxuan Zhang, Eric Chitambar
Quantum entanglement is a fundamental feature of quantum mechanics, yet certain entangled states that are unsteerable can be classically simulated in steering scenarios, making the…
Information Carried by a Single Particle in Quantum Multiple-Access Channels
Xinan Chen, Yujie Zhang, Andreas Winter +2
Non-classical features of quantum systems have the potential to strengthen the way we currently exchange information. In this paper, we explore this enhancement on the most basic l…
Fiber-based photon pair generation: a tutorial
Karina Garay-Palmett, Dong Beom Kim, Yujie Zhang +3
The purpose of this tutorial paper is to present a broad overview of photon-pair generation through the spontaneous four wave mixing (SFWM) process in optical fibers. Progress in o…
Superresolution in interferometric imaging of strong thermal sources
Yunkai Wang, Yujie Zhang, Virginia O. Lorenz
Imaging using interferometer arrays based on the Van Cittert-Zernike theorem has been widely used in astronomical observation. Recently it was shown that superresolution can be ach…
Building Multiple Access Channels with a Single Particle
Yujie Zhang, Xinan Chen, Eric Chitambar
A multiple access channel describes a situation in which multiple senders are trying to forward messages to a single receiver using some physical medium. In this paper we consider…
Channel Activation of CHSH Nonlocality
Yujie Zhang, Rodrigo Araiza Bravo, Virginia O. Lorenz +1
Quantum channels that break CHSH nonlocality on all input states are known as CHSH-breaking channels. In quantum networks, such channels are useless for distributing correlations t…
Dual-Pump Approach to Photon-Pair Generation: Demonstration of Enhanced Characterization and Engineering Capabilities
Yujie Zhang, Ryan Spiniolas, Kai Shinbrough +3
We experimentally study the generation of photon pairs via spontaneous four-wave mixing with two distinct laser pulses. We find that the dual-pump technique enables new capabilitie…