A5005489421- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Quantum Mechanics and Applications
- Quantum chaos and dynamical systems
- Advancements in Semiconductor Devices and Circuit Design
- Electronic and Structural Properties of Oxides
- Quantum, superfluid, helium dynamics
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Neural Networks and Reservoir Computing
Delft University of Technology
2021-2023
QuTech
2021-2023
We introduce the sudden variant (SNZ) of Net Zero scheme realizing controlled-$Z$ (CZ) gates by baseband flux control transmon frequency. SNZ CZ operate at speed limit transverse coupling between computational and non-computational states maximizing intermediate leakage. The key advantage is tuneup simplicity, owing to regular structure conditional phase leakage as a function two parameters. realize in multi-transmon processor, achieving $99.93\pm0.24\%$ fidelity $0.10\pm0.02\%$ compatible...
Abstract The preparation of thermal equilibrium states is important for the simulation condensed matter and cosmology systems using a quantum computer. We present method to prepare such mixed with unitary operators demonstrate this technique experimentally gate-based processor. Our targets generation thermofield double hybrid quantum-classical variational approach motivated by quantum-approximate optimization algorithms, without prior calculation optimal parameters numerical simulation....
Abstract Artificial neural networks are becoming an integral part of digital solutions to complex problems. However, employing on quantum processors faces challenges related the implementation non-linear functions using circuits. In this paper, we use repeat-until-success circuits enabled by real-time control-flow feedback realize neurons with activation functions. These constitute elementary building blocks that can be arranged in a variety layouts carry out deep learning tasks coherently....
Abstract Future fault-tolerant quantum computers will require storing and processing data in logical qubits. We realize a suite of operations on distance-two qubit stabilized using repeated error detection cycles. Logical include initialization into arbitrary states, measurement the cardinal bases Bloch sphere, universal set single-qubit gates. For each type operation, we observe higher performance for variants over non-fault-tolerant variants, quantify difference through detailed...
Abstract Artificial neural networks are becoming an integral part of digital solutions to complex problems. However, employing on quantum processors faces challenges related the implementation non-linear functions using circuits. In this paper, we use repeat-until-success circuits enabled by real-time control-flow feedback realize neurons with activation functions. These constitute elementary building blocks that can be arranged in a variety layouts carry out deep learning tasks coherently....
The preparation of thermal equilibrium states is important for the simulation condensed-matter and cosmology systems using a quantum computer. We present method to prepare such mixed with unitary operators, demonstrate this technique experimentally gate-based processor. Our targets generation thermofield double hybrid quantum-classical variational approach motivated by quantum-approximate optimization algorithms, without prior calculation optimal parameters numerical simulation. fidelity...