226 citations · 846 across the 26 of their papers we have counts for
26 papers
Anisotropy reduction and tunability of hole-spin qubit g-factor in strained parabolic Ge/SiGe quantum wells
R. K. L. Colmenar, Arthur Lin, Omadillo Abdurazakov +3
Hole-spin qubits in planar Ge/SiGe heterostructures have attracted significant attention in recent years owing to their favorable electrical characteristics and prolonged coherence…
Formation of dark excitons in monolayer transition metal dichalcogenides by a vortex beam: optical selection rules
Omadillo Abdurazakov, Chunqiang Li, Yun-Pil Shim
Monolayer transition metal dichalcogenides host tightly-bound excitons, which dominate their optoelectronic response even at room temperatures. Light beams are often used to study…
Pauli Spin Blockade in a Resonant Triple Quantum Dot Molecule
Yun-Pil Shim
Pauli spin blockade in quantum dot systems occurs when the charge transport is allowed only for some spin states, and it has been an efficient tool in spin-based qubit devices in s…
Universal non-adiabatic control of small-gap superconducting qubits
Daniel L. Campbell, Yun-Pil Shim, Bharath Kannan +7
Resonant transverse driving of a two-level system as viewed in the rotating frame couples two degenerate states at the Rabi frequency, an amazing equivalence that emerges in quantu…
Induced quantum dot probe for material characterization
Yun-Pil Shim, Rusko Ruskov, Hilary M. Hurst +1
We propose a non-destructive means of characterizing a semiconductor wafer via measuring parameters of an induced quantum dot on the material system of interest with a separate pro…
Theory of barrier vs tilt exchange gate operations in spin-based quantum computing
Yun-Pil Shim, Charles Tahan
We present a theory for understanding the exchange interaction between electron spins in neighboring quantum dots, either by changing the detuning of the two quantum dots or indepe…
Charge-noise-insensitive gate operations for always-on, exchange-only qubits
Yun-Pil Shim, Charles Tahan
We introduce an always-on, exchange-only qubit made up of three localized semiconductor spins that offers a true "sweet spot" to fluctuations of the quantum dot energy levels. Both…
Semiconductor-inspired design principles for superconducting quantum computing
Yun-Pil Shim, Charles Tahan
Superconducting circuits offer tremendous design flexibility in the quantum regime culminating most recently in the demonstration of few qubit systems supposedly approaching the th…
Characterizing gate operations near the sweet spot of an exchange-only qubit
Jianjia Fei, Jo-Tzu Hung, Teck Seng Koh +4
Optimal working points or "sweet spots" have arisen as an important tool for mitigating charge noise in quantum dot logical spin qubits. The exchange-only qubit provides an ideal s…
Superconducting-semiconductor quantum devices: from qubits to particle detectors
Yun-Pil Shim, Charles Tahan
Recent improvements in materials growth and fabrication techniques may finally allow for superconducting semiconductors to realize their potential. Here we build on a recent propos…
Bottom-up superconducting and Josephson junction devices inside a group-IV semiconductor
Yun-Pil Shim, Charles Tahan
Superconducting circuits are exceptionally flexible, enabling many different devices from sensors to quantum computers. Separately, epitaxial semiconductor devices such as spin qub…
Single-qubit gates in two steps with rotation axes in a single plane
Yun-Pil Shim, Jianjia Fei, Sangchul Oh +2
Any single-qubit unitary operation or quantum gate can be considered a rotation. Typical experimental implementations of single-qubit gates involve two or three fixed rotation axes…
Probing Quantum Phase Transitions on a Spin Chain with a Double Quantum Dot
Yun-Pil Shim, Sangchul Oh, Jianjia Fei +2
Quantum phase transitions (QPTs) in qubit systems are known to produce singularities in the entanglement, which could in turn be used to probe the QPT. Current proposals to measure…
Mediated gates between spin qubits
Jianjia Fei, Dong Zhou, Yun-Pil Shim +3
In a typical quantum circuit, nonlocal quantum gates are applied to nonproximal qubits. If the underlying physical interactions are short-range (e.g., exchange interactions between…
Resonant Adiabatic Passage with Three Qubits
Sangchul Oh, Yun-Pil Shim, Jianjia Fei +2
We investigate the non-adiabatic implementation of an adiabatic quantum teleportation protocol, finding that perfect fidelity can be achieved through resonance. We clarify the phys…
A fast "hybrid" silicon double quantum dot qubit
Zhan Shi, C. B. Simmons, J. R. Prance +9
We propose a quantum dot qubit architecture that has an attractive combination of speed and fabrication simplicity. It consists of a double quantum dot with one electron in one dot…
Theory of electronic properties and quantum spin blockade in a gated linear triple quantum dot with one electron spin each
Chang-Yu Hsieh, Yun-Pil Shim, Pawel Hawrylak
We present a theory of electronic properties and the spin blockade phenomena in a gated linear triple quantum dot. Quadruple points where four different charge configurations are o…
Heisenberg Spin Bus as a Robust Transmission Line for Perfect State Transfer
Sangchul Oh, Lian-Ao Wu, Yun-Pil Shim +2
We study the protocol known as quantum state transfer for a strongly coupled antiferromagnetic spin chain or ring (acting as a spin bus), with weakly coupled external qubits. By tr…
Controllable anisotropic exchange coupling between spin qubits in quantum dots
Yun-Pil Shim, Sangchul Oh, Xuedong Hu +1
The exchange coupling between quantum dot spin qubits is isotropic, which restricts the types of quantum gates that can be formed. Here, we propose a method for controlling anisotr…
Effect of Randomness on Quantum Data Buses of Heisenberg Spin Chains
Sangchul Oh, Yun-Pil Shim, Jianjia Fei +2
A strongly coupled spin chain can mediate long-distance effective couplings or entanglement between remote qubits, and can be used as a quantum data bus. We study how the fidelity…
Macroscopic quantum state in a semiconductor device
Yun-Pil Shim, Anand Sharma, Chang-Yu Hsieh +1
We show how nanostructuring of a metallic gate on a field-effect transistor (FET) can lead to a macroscopic, robust and voltage controlled quantum state in the electron channel of…
Spin-Orbit Interactions in Bilayer Exciton-Condensate Ferromagnets
Y. -P. Shim, A. H. MacDonald
Bilayer electron-hole systems with unequal electron and hole densities are expected to have exciton condensate ground states with spontaneous spin-polarization in both conduction a…
Tunneling spectroscopy of spin-selective Aharonov-Bohm oscillations in a lateral triple quantum dot molecule
Y. -P. Shim, F. Delgado, P. Hawrylak
We present a theory of tunneling spectroscopy of spin-selective Aharonov-Bohm oscillations in a lateral triple quantum dot molecule. The theory combines exact treatment of an isola…
Spin selective Aharonov-Bohm oscillations in a lateral triple quantum dot
F. Delgado, Y. -P. Shim, M. Korkusinski +4
We present a theory for spin selective Aharonov-Bohm oscillations in a lateral triple quantum dot. We show that to understand the Aharonov-Bohm (AB) effect in an interacting electr…