19 citations · 109 across the 10 of their papers we have counts for
11 papers
Sampling quantum states with inequality constraints
Weijun Li, Rui Han, Jiangwei Shang +2
Random samples of quantum states with specific properties are useful for various applications, such as Monte Carlo integration over the state space. In the high-dimensional situati…
Uncorrelated problem-specific samples of quantum states from zero-mean Wishart distributions
Rui Han, Weijun Li, Shrobona Bagchi +2
Random samples of quantum states are an important resource for various tasks in quantum information science, and samples in accordance with a problem-specific distribution can be i…
Universally Optimal Verification of Entangled States with Nondemolition Measurements
Ye-Chao Liu, Jiangwei Shang, Rui Han +1
The efficient and reliable characterization of quantum states plays a vital role in most, if not all, quantum information processing tasks. In this work, we present a universally o…
Extracting unambiguous information from a single qubit by sequential observers
Dov Fields, Rui Han, Mark Hillery +1
In a recent paper [Phys. Rev. Lett. 111, 100501 (2013)], a scheme was proposed where subsequent observers can extract unambiguous information about the initial state of a qubit, wi…
The Helstrom measurement: A nondestructive implementation
Rui Han, Gerd Leuchs, János A. Bergou
We discuss a novel implementation of the minimum error state discrimination measurement, originally introduced by Helstrom. In this implementation, instead of performing the optima…
Residual and Destroyed Accessible Information after Measurements
Rui Han, Gerd Leuchs, Markus Grassl
When quantum states are used to send classical information, the receiver performs a measurement on the signal states. The amount of information extracted is often not optimal due t…
Near optimal discrimination of binary coherent signals via atom-light interaction
Rui Han, János A. Bergou, Gerd Leuchs
We study the discrimination of weak coherent states of light with significant overlaps by nondestructive measurements on the light states through measuring atomic states that are e…
Implementing a neutral-atom controlled-phase gate with a single Rydberg pulse
Rui Han, Hui Khoon Ng, Berthold-Georg Englert
One can implement fast two-qubit entangling gates by exploiting the Rydberg blockade. Although various theoretical schemes have been proposed, experimenters have not yet been able…
Raman transitions without adiabatic elimination: A simple and accurate treatment
Rui Han, Hui Khoon Ng, Berthold-Georg Englert
Driven Raman processes --- nearly resonant two-photon transitions through an intermediate state that is non-resonantly coupled and does not acquire a sizeable population --- are co…
Beyond adiabatic elimination: A hierarchy of approximations for multi-photon processes
Vanessa Paulisch, Rui Han, Hui Khoon Ng +1
In multi-level systems, the commonly used adiabatic elimination is a method for approximating the dynamics of the system by eliminating irrelevant, non-resonantly coupled levels. T…
Long-lived qubit from three spin-1/2 atoms
Rui Han, Niels Lörch, Jun Suzuki +1
A system of three spin-1/2 atoms allows the construction of a reference-frame-free (RFF) qubit in the subspace with total angular momentum . The RFF qubit stays coherent per…