38 citations · 87 across the 4 of their papers we have counts for
14 papers
Classical simulation of lossy boson sampling using matrix product operators
Changhun Oh, Kyungjoo Noh, Bill Fefferman +1
Characterizing the computational advantage from noisy intermediate-scale quantum (NISQ) devices is an important task from theoretical and practical perspectives. Here, we numerical…
Field-gradient measurement using a Stern-Gerlach atomic interferometer with butterfly geometry
Changhun Oh, Hyukjoon Kwon, Liang Jiang +1
Atomic interferometers have been studied as a promising device for precise sensing of external fields. Among various configurations, a particular configuration with a butterfly-sha…
Optical estimation of unitary Gaussian processes without phase reference using Fock states
Changhun Oh, Kimin Park, Radim Filip +2
Since a general Gaussian process is phase-sensitive, a stable phase reference is required to take advantage of this feature. When the reference is missing, either due to the volati…
Infrared study of carrier scattering mechanism in ion-gated graphene
Kwangnam Yu, Jiwon Jeon, Jiho Kim +5
We performed infrared transmission experiment on ion-gel gated graphene and measured carrier scattering rate g as function of carrier density n over wide range up to n=2E13 cm-2. T…
Optimal Distributed quantum sensing using Gaussian states
Changhun Oh, Changhyoup Lee, Seok Hyung Lie +1
We find and investigate the optimal scheme of quantum distributed Gaussian sensing for estimation of the average of independent phase shifts. We show that the ultimate sensitivity…
Using states with a large photon number variance to increase quantum Fisher information in single-mode phase estimation
Changhyoup Lee, Changhun Oh, Hyunseok Jeong +2
When estimating the phase of a single mode, the quantum Fisher information for a pure probe state is proportional to the photon number variance of the probe state. In this work, we…