252 citations · 445 across the 13 of their papers we have counts for
13 papers
High performance imaging of Yb atom in shallow clock-magic tweezer by alternating dual-tone narrowline cooling
Yunheung Song, Kangheun Kim, Jeong Ho Han +2
We demonstrate imaging Yb single atoms in clock-magic tweezers of 759.4 nm wavelength, with above 99.9% fidelity and survival. We use alternating dual-tone narrowline imagi…
Quantum annealing of Cayley-tree Ising spins at small scales
Yunheung Song, Minhyuk Kim, Hansub Hwang +2
Significant efforts are being directed towards developing a quantum annealer capable of solving combinatorial optimization problems. The challenges are Hamiltonian programming and…
Quantum-Ising Hamiltonian programming in trio, quartet, and sextet qubit systems
Minhyuk Kim, Yunheung Song, Jaewan Kim +1
Rydberg-atom quantum simulators are of keen interest because of their possibilities towards high-dimensional qubit architectures. Here we report three-dimensional conformation spec…
Rydberg atom entanglements in the weak coupling regime
Hanlae Jo, Yunheung Song, Minhyuk Kim +1
We present an entanglement scheme for Rydberg atoms using the van der Waals interaction phase induced by Ramsey-type pulsed interactions. This scheme realizes not only controlled p…
Ultrafast time-scale Berry-phase gates of atomic clock states
Yunheung Song, Jongseok Lim, Jaewook Ahn
Extremely fast qubit controls can greatly reduce the calculation time in quantum computation, and potentially resolve the finite-time decoherence issues in many physical systems. H…
Coherent and dissipative dynamics of entangled few-body systems of Rydberg atoms
Woojun Lee, Minhyuk Kim, Hanlae Jo +2
Experimentally observed quantum few-body dynamics of neutral atoms excited to a Rydberg state are numerically analyzed with Lindblad master equation formalism. For this, up to five…
Leakage suppression by ultrafast pulse shaping
Hanlae Jo, Yunheung Song, Jaewook Ahn
We consider the leakage suppression problem of a three-level system in which the first two levels are the qubit system and the third, weakly-coupled to the second, is the leakage s…
Subpicosecond rotations of atomic clock states
Yunheung Song, Han-gyeol Lee, Hyosub Kim +2
We demonstrate subpicosecond-time-scale population transfer between the pair of hyperfine ground states of atomic rubidium using a single laser-pulse. Our scheme utilizes the geome…
Single-laser-pulse implementation of arbitrary ZYZ rotations of an atomic qubit
Han-gyeol Lee, Yunheung Song, Jaewook Ahn
Arbitrary rotation of a qubit can be performed with a three-pulse sequence; for example, ZYZ rotations. However, this requires precise control of the relative phase and timing betw…
Selective excitation in a three-state system using a hybrid adiabatic-nonadiabatic interaction
Yunheung Song, Han-gyeol Lee, Hanlae Jo +1
The chirped-pulse interaction in the adiabatic coupling regime induces cyclic permutations of the energy states of a three-level system in the -type configuration, which process…
In situ single-atom array synthesis by dynamic holographic optical tweezers
Hyosub Kim, Woojun Lee, Han-gyeol Lee +3
Cooling and trapping of atoms by light has enabled one to build and manipulate quantum systems at the single atom level. Such a bottom-up approach becomes one of the fascinating ch…
Quantum dynamics of a two-state system induced by a chirped zero-area pulse
Han-gyeol Lee, Yunheung Song, Hyosub Kim +2
It is well known that area pulses make Rabi oscillation and chirped pulses in the adiabatic interaction regime induce complete population inversion of a two-state system. Here we s…
Rabi oscillations of Morris-Shore transformed -state systems by elliptically polarized ultrafast laser pulses
Hyosub Kim, Yunheung Song, Han-gyeol Lee +1
We present an experimental investigation of ultrafast-laser driven Rabi oscillations of atomic rubidium. Since the broadband spectrum of an ultrafast laser pulse simultaneously cou…