A two-dimensional array of single-hole quantum dots

Abstract

Quantum dots fabricated using techniques and materials that are compatible with semiconductor manufacturing are promising for quantum information processing. While great progress has been made toward high-fidelity control of quantum dots positioned in a linear arrangement, scalability along two dimensions is a key step toward practical quantum information processing. Here we demonstrate a two-dimensional quantum dot array where each quantum dot is tuned to single-charge occupancy, verified by simultaneous measuring with two integrated radio frequency charge sensors. We achieve this by using planar germanium quantum dots with low disorder and small effective mass, allowing the incorporation of dedicated barrier gates to control the coupling of the quantum dots. We demonstrate hole charge filling consistent with a Fock-Darwin spectrum and show that we can tune single-hole quantum dots from isolated quantum dots to strongly exchange coupled quantum dots. These results motivate the use of planar germanium quantum dots as building blocks for quantum simulation and computation.

arXiv comment7 pages, 4 figures

References in corpus (34)

• Quantum Computation with Quantum Dots
• The Physical Implementation of Quantum Computation
• Driven coherent oscillations of a single electron spin in a quantum dot
• Quantum Error Correction for Quantum Memories
• Silicon Quantum Electronics
• An addressable quantum dot qubit with fault-tolerant control fidelity
• Storing quantum information for 30 seconds in a nanoelectronic device
• Interfacing spin qubits in quantum dots and donors - hot, dense and coherent
• A CMOS silicon spin qubit
• The germanium quantum information route
• Quantum simulation of a Fermi-Hubbard model using a semiconductor quantum dot array
• Scalable gate architecture for densely packed semiconductor spin qubits
• Spin relaxation and decoherence of holes in quantum dots
• Fast two-qubit logic with holes in germanium
• A Crossbar Network for Silicon Quantum Dot Qubits
• Ge hole spin qubit
• Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot
• A single-hole spin qubit
• Electric Dipole Spin Resonance for Heavy Holes in Quantum Dots
• Quantum Dot Arrays in Silicon and Germanium
• Low disordered, stable, and shallow germanium quantum wells: a playground for spin and hybrid quantum technology
• Gate-controlled quantum dots and superconductivity in planar germanium
• Coherent spin state transfer via Heisenberg exchange
• Light effective hole mass in undoped Ge/SiGe quantum wells
• A 2x2 quantum dot array with controllable inter-dot tunnel couplings
• Spin filling and orbital structure of the first six holes in a silicon metal-oxide-semiconductor quantum dot
• Charge detection in an array of CMOS quantum dots
• Spin filling of valley-orbit states in a silicon quantum dot
• Spin relaxation benchmarks and individual qubit addressability for holes in quantum dots
• Single-electron operation of a silicon-CMOS 2x2 quantum dot array with integrated charge sensing
• Single, double, and triple quantum dots in Ge/Si nanowires
• Remote capacitive sensing in two-dimension quantum-dot arrays
• Quantum error correction in crossbar architectures
• Orbital effects of a strong in-plane magnetic field on a gate-defined quantum dot

Cited by in corpus (22)

• Semiconductor Spin Qubits
• A four-qubit germanium quantum processor
• Review of performance metrics of spin qubits in gated semiconducting nanostructures
• Probing quantum devices with radio-frequency reflectometry
• Simultaneous single-qubit driving of semiconductor spin qubits at the fault-tolerant threshold
• Probing resonating valence bonds on a programmable germanium quantum simulator
• Quantum control of hole spin qubits in double quantum dots
• All-electrical control of hole singlet-triplet spin qubits at low leakage points
• Charge-noise induced dephasing in silicon hole-spin qubits
• CMOS Quantum Computing: Toward A Quantum Computer System-on-Chip
• Emergence and Dynamical Stability of Charge Time-Crystal in a Current-Carrying Quantum Dot Simulator
• Majorana zero modes in gate-defined germanium hole nanowires
• Autonomous estimation of high-dimensional Coulomb diamonds from sparse measurements
• A quantum dot in germanium proximitized by a superconductor
• Coupled vertical double quantum dots at single-hole occupancy
• Modular Autonomous Virtualization System for Two-Dimensional Semiconductor Quantum Dot Arrays
• Gate reflectometry in dense quantum dot arrays
• Exact analytical treatment of multiqubit noisy dynamics in exchange-coupled semiconductor spin qubits
• Braiding Majoranas in a linear quantum dot-superconductor array: Mitigating the errors from Coulomb repulsion and residual tunneling
• Conductance of a Dissipative Quantum Dot: Nonequilibrium Crossover Near a Non-Fermi-Liquid Quantum Critical Point
• Effect of disorder and strain on the operation of planar Ge hole spin qubits
• Giant Rabi frequencies between qubit and excited hole states in silicon quantum dots