A5102743394- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Quantum optics and atomic interactions
- Quantum Computing Algorithms and Architecture
- Diamond and Carbon-based Materials Research
- Atomic and Subatomic Physics Research
- Metamaterials and Metasurfaces Applications
- HVDC Systems and Fault Protection
- Computability, Logic, AI Algorithms
- Superconductivity in MgB2 and Alloys
- Physics of Superconductivity and Magnetism
Centre for Quantum Computation and Communication Technology
2024-2025
UNSW Sydney
2024-2025
Quantum (Australia)
2024
Quantum Design (Germany)
2022
Karlsruhe Institute of Technology
2014
FZI Research Center for Information Technology
2003
Single electron spins bound to multi-phosphorus nuclear spin registers in silicon have demonstrated fast (0.8 ns) two-qubit
Spin qubits in silicon are strong contenders for the realization of a practical quantum computer. Single- and two-qubit gates have shown fidelities above fault-tolerant threshold, entanglement three has been achieved. Furthermore, high-fidelity operation algorithms is possible. Here we implement four-qubit processor with all control threshold. We demonstrate three-qubit Grover's search algorithm ~95% probability finding marked state. To this end, fabricate from phosphorus atoms...
Phosphorus donor nuclear spins in silicon couple weakly to the environment, making them promising candidates for high-fidelity qubits. The state of a spin qubit can be manipulated and read out using its hyperfine interaction with electron confined by potential. Here we use master-equation-based approach investigate how backaction from this electron-mediated measurement affects lifetimes single multidonor We analyze process as function electric magnetic fields strength. Apart flips, identify...
MgB2 wires and tapes suffer from a limitation of the transport current densities, especially at low field, due to an unsufficient thermal stabilization caused by hot spots non-homogeneous microstructure, presence secondary phases voids. For preparation two different precursor routes, using (ex-situ process) or Mg + B (in-situ are applied. The in-situ approach allows variation many parameters in wire improvement this is central topic paper. We present improved approach, characterization...
Variational algorithms are promising candidates to be implemented on near-term quantum computers. The variational eigensolver (VQE) is a prominent example, where parametrized trial state of the mechanical wave function optimized obtain ground energy. In our work, we investigate Hamiltonian Ansatz (VHA), given by non-interacting reference modified unitary rotations using generators that part describing system. lowest energy obtained optimizing angles those rotations. A standard procedure...
Phosphorus donor nuclear spins in silicon couple weakly to the environment making them promising candidates for high-fidelity qubits. The state of a spin qubit can be manipulated and read out using its hyperfine interaction with electron confined by potential. Here we use master equation-based approach investigate how backaction from this electron-mediated measurement affects lifetimes single multi-donor We analyze process as function electric magnetic fields, strength. Apart flips, identify...