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Q: Fachverband Quantenoptik und Photonik
Q 5: Quantum Technologies I
Q 5.2: Vortrag
Montag, 14. März 2022, 14:15–14:30, Q-H13
Maximising qubit per node in a quantum memory node using silicon vacancy color center and isotope nuclear spin in 4H-SiC — •Shravan Kumar Parthasarathy1, Roland Nagy2, Berwian Patrick1, and Birgit Kallinger1 — 1Fraunhofer IISB — 2FAU Erlangen
The silicon vacancy color center (VSi−) in 4H-SiC is examined to be a potential candidate for quantum technology applications. The experimental feasibility of realizing a quantum memory node is probed into currently by coupling the spin of VSi- in a 4H-SiC sample which is composed of electrons with that of the isotope nuclear spin (13C or 29Si) in the lattice. The coupling of the isotope with the color center can be utilized using a controlled rotation (CROT) pulse sequence to achieve maximal entanglement between the corresponding spins. Maximizing the isotope nuclear spin qubits entangled within one node would prove to be beneficial to the construction of a distributed quantum computing network. It is hence important to analyze how many such nuclear spins could be identified to achieve maximal entanglement. A numerical model that makes use of a protocol to identify the nuclear spin is hence constructed. The sample parameters like the concentration of the isotope and that of the experimental parameters of the microwave pulse sequence which plays a vital role are fed into the simulation and a statistical analysis is performed to understand their corresponding influence. The simulation is aimed at providing a direction on how to adjust the sample and experimental parameters to optimise the control over maximal number of qubits within one quantum memory node.