Efficient orthogonal control of tunnel couplings in a quantum dot array
arXiv:2001.07671 · doi:10.1103/PhysRevApplied.13.054018
Abstract
Electrostatically-defined semiconductor quantum dot arrays offer a promising platform for quantum computation and quantum simulation. However, crosstalk of gate voltages to dot potentials and inter-dot tunnel couplings complicates the tuning of the device parameters. To date, crosstalk to the dot potentials is routinely and efficiently compensated using so-called virtual gates, which are specific linear combinations of physical gate voltages. However, due to exponential dependence of tunnel couplings on gate voltages, crosstalk to the tunnel barriers is currently compensated through a slow iterative process. In this work, we show that the crosstalk on tunnel barriers can be efficiently characterized and compensated for, using the fact that the same exponential dependence applies to all gates. We demonstrate efficient calibration of crosstalk in a quadruple quantum dot array and define a set of virtual barrier gates, with which we show orthogonal control of all inter-dot tunnel couplings. Our method marks a key step forward in the scalability of the tuning process of large-scale quantum dot arrays.
8 pages, 7 figures
References in corpus (3)
Cited by in corpus (26)
- Semiconductor Spin Qubits
- Adiabatic quantum state transfer in a semiconductor quantum-dot spin chain
- Colloquium: Advances in automation of quantum dot devices control
- 12-spin-qubit arrays fabricated on a 300 mm semiconductor manufacturing line
- Quantum simulation of antiferromagnetic Heisenberg chain with gate-defined quantum dots
- Crosstalk analysis for single-qubit and two-qubit gates in spin qubit arrays
- The squeezed Kerr oscillator: spectral kissing and phase-flip robustness
- Coherent multi-spin exchange coupling in a quantum-dot spin chain
- Exciton transport in a germanium quantum dot ladder
- Electron cascade for spin readout
- Thermodynamic Uncertainty Relations for Coherent Transport
- Automated extraction of capacitive coupling for quantum dot systems
- Autonomous estimation of high-dimensional Coulomb diamonds from sparse measurements
- Crosstalk analysis for simultaneously driven two-qubit gates in spin qubit arrays
- Tunable interdot coupling in few-electron bilayer graphene double quantum dots
- Phonon-induced pairing in quantum dot quantum simulator
- Modular Autonomous Virtualization System for Two-Dimensional Semiconductor Quantum Dot Arrays
- Designing high-fidelity multi-qubit gates for semiconductor quantum dots through deep reinforcement learning
- A spinless spin qubit
- Quantum estimation and remote charge sensing with a hole-spin qubit in silicon
- Highly tunable 2D silicon quantum dot array with coupling beyond nearest neighbors
- Experimental online quantum dots charge autotuning using neural networks
- Fermionic quantum computation with Cooper pair splitters
- Preserving Coulomb blockade in transport spectroscopy of quantum dots, by dynamical tunnel-barrier compensation
- Operating two exchange-only qubits in parallel
- Interplay of Zeeman Splitting and Tunnel Coupling in Coherent Spin Qubit Shuttling