Fortuin, Thomas (2023) Distributed qubit-register on a multi-node network with NV centers using Dynamical Decoupling with Radio Frequency pulses. Master's Thesis / Essay, Physics.
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Abstract
Future network-based quantum computation requires access to a large qubit register that can be controlled selectively and deterministically. A promising candidate for hosting quantum processors in such a network is the nitrogen-vacancy center (NV) in diamond. To expand the qubit register further, nuclear spins associated with carbon-13 atoms in the diamond can be used as an additional qubit resource in the network. Realizing large qubit register with these nuclear spins require gates that avoid crosstalk and protect the coherence of the system. This work exploits a novel method to selectively control nuclear spins using Dynamical Decoupling with Radio Frequency pulses (DDRF). The employment of a control field in this method to manipulate the state of the spin allows access to a large number of spins in the environment. We provide new insight and understanding of DDRF that addresses the driving efficiency. To optimize the gates, we built a model that estimates the gate fidelity of DDRF gates considering crosstalk and decoherence. We apply the optimized gates to a qubit-register distributed over a single-, two- and three- node network to create a Greenberger-HorneZeillinger (GHZ) state to estimate the performance of the register. We simulate the creation of a distributed GHZ-state of 7 qubits over two nodes with a fidelity of 0.55.
| Item Type: | Thesis (Master's Thesis / Essay) |
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| Supervisor name: | Wal, C.H. van der |
| Degree programme: | Physics |
| Thesis type: | Master's Thesis / Essay |
| Language: | English |
| Date Deposited: | 14 Apr 2023 14:16 |
| Last Modified: | 07 Jun 2023 07:16 |
| URI: | https://fse.studenttheses.ub.rug.nl/id/eprint/29262 |
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