Universal logic with encoded spin qubits in silicon

AJ Weinstein, MD Reed, AM Jones, RW Andrews… - Nature, 2023‏ - nature.com
Quantum computation features known examples of hardware acceleration for certain
problems, but is challenging to realize because of its susceptibility to small errors from noise …

Wigner molecular crystals from multielectron moiré artificial atoms

H Li, Z **ang, AP Reddy, T Devakul, R Sailus… - Science, 2024‏ - science.org
Semiconductor moiré superlattices provide a versatile platform to engineer quantum solids
composed of artificial atoms on moiré sites. Previous studies have mostly focused on the …

SiGe quantum wells with oscillating Ge concentrations for quantum dot qubits

T McJunkin, B Harpt, Y Feng, MP Losert… - Nature …, 2022‏ - nature.com
Large-scale arrays of quantum-dot spin qubits in Si/SiGe quantum wells require large or
tunable energy splittings of the valley states associated with degenerate conduction band …

A short review of one-dimensional Wigner crystallization

NT Ziani, F Cavaliere, KG Becerra, M Sassetti - Crystals, 2020‏ - mdpi.com
The simplest possible structural transition that an electronic system can undergo is Wigner
crystallization. The aim of this short review is to discuss the main aspects of three recent …

Wigner-molecule supercrystal in transition metal dichalcogenide moiré superlattices: Lessons from the bottom-up approach

C Yannouleas, U Landman - Physical Review B, 2024‏ - APS
The few-body problem for N= 4 fermionic charge carriers in a double-well moiré quantum
dot (MQD), representing the first step in a bottom-up strategy to investigate formation of …

Longitudinal coupling between a double quantum dot and an off-chip resonator

J Corrigan, B Harpt, N Holman, R Ruskov… - Physical Review …, 2023‏ - APS
Superconducting cavities have emerged as a key tool for measuring the spin states of
quantum dots. So far, however, few experiments have explored longitudinal couplings …

Valley splittings in Si/SiGe quantum dots with a germanium spike in the silicon well

T McJunkin, ER MacQuarrie, L Tom, SF Neyens… - Physical Review B, 2021‏ - APS
Silicon-germanium heterostructures have successfully hosted quantum dot qubits, but the
intrinsic near-degeneracy of the two lowest valley states poses an obstacle to high-fidelity …

Jellybean Quantum Dots in Silicon for Qubit Coupling and On‐Chip Quantum Chemistry

Z Wang, MK Feng, S Serrano, W Gilbert… - Advanced …, 2023‏ - Wiley Online Library
The small size and excellent integrability of silicon metal–oxide–semiconductor (SiMOS)
quantum dot spin qubits make them an attractive system for mass‐manufacturable, scaled …

Strong hole-photon coupling in planar Ge for probing charge degree and strongly correlated states

F De Palma, F Oppliger, W Jang, S Bosco… - Nature …, 2024‏ - nature.com
Semiconductor quantum dots (QDs) in planar germanium (Ge) heterostructures have
emerged as front-runners for future hole-based quantum processors. Here, we present …

Quantum Wigner molecules in moiré materials

C Yannouleas, U Landman - Physical Review B, 2023‏ - APS
The few-body problem (with N≤ 6 fermionic charge carriers) in isolated moiré quantum dots
(MQDs) in transition metal dichalcogenide (TMD) bilayer materials with integer fillings, ν≥ 2 …