197 citations · 1.7k across the 64 of their papers we have counts for
10 papers · 1 filter
Local Gaussian bounds on the non-destructive discrimination of two-mode squeezed states
Mi-Jung So, James Moran, Youngrong Lim +2
Typical measurement setups in quantum systems are destructive, meaning that states are irretrievably altered after measurement. In this work, we analyse non-destructive discriminat…
Single-Qubit Reaped Quantum State Tomography
Mahn-Soo Choi
Quantum state tomography is the experimental procedure of determining an unknown state. It is not only essential for the verification of resources and processors of quantum informa…
Geometric Manipulation of a Decoherence-Free Subspace in Atomic Ensembles
Dongni Chen, Si Luo, Ying-Dan Wang +2
We consider an ensemble of atoms with -type level structure trapped in a single-mode cavity, and propose a geometric scheme of coherent manipulation of quantum states on the sub…
Ultimate Precision of Direct Tomography of Wave Functions
Xuan-Hoai Thi Nguyen, Mahn-Soo Choi
In contrast to the standard quantum state tomography, the direct tomography seeks the direct access to the complex values of the wave function at particular positions (i.e., the ex…
Recurrent delocalization and quasi-equilibration of photons in coupled circuit QED systems
Myung-Joong Hwang, M. S. Kim, Mahn-Soo Choi
We explore the photon population dynamics in two coupled circuit QED systems. For a sufficiently weak inter-cavity photon hopping, as the photon-cavity coupling increases, the dyna…
Entropic equality for worst-case work at any protocol speed
Oscar Dahlsten, Mahn-Soo Choi, Daniel Braun +3
We derive an equality for non-equilibrium statistical mechanics in finite-dimensional quantum systems. The equality concerns the worst-case work output of a time-dependent Hamilton…
Local and Nonlocal Contents in N-qubit generalized GHZ states
Chang-liang Ren, Mahn-soo Choi
We investigate local contents in -qubit generalized Greenberger, Horne, and Zeilinger (GHZ) states. We suggest a decomposition for correlations in the GHZ states into a nonlocal…
Hardy's Test versus the CHSH Test of Quantum Non-Locality: Fundamental and Practical Aspects
Daniel Braun, Mahn-Soo Choi
We compare two different tests of quantum non-locality, both in theoretical terms and with respect to a possible implementation in a mesoscopic circuit: Hardy's test [Hardy, Phys.…
Quantum Key Distribution Using Quantum Faraday Rotators
Taeseung Choi, Mahn-Soo Choi
We propose a new quantum key distribution (QKD) protocol based on the fully quantum mechanical states of the Faraday rotators. The protocol is unconditionally secure against collec…
Geometric Quantum Computation on Solid-State Qubits
Mahn-Soo Choi
An adiabatic cyclic evolution of control parameters of a quantum system ends up with a holonomic operation on the system, determined entirely by the geometry in the parameter space…