Deterministic Creation of Large Photonic Multipartite Entangled States with Group-IV Color Centers in Diamond. Pieplow, G., Strocka, Y., Isaza-Monsalve, M., Munns, J. H. D., & Schröder, T. December, 2023. arXiv:2312.03952 [quant-ph]
Deterministic Creation of Large Photonic Multipartite Entangled States with Group-IV Color Centers in Diamond [link]Paper  doi  abstract   bibtex   1 download  
Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.
@misc{pieplow_deterministic_2023,
	title = {Deterministic {Creation} of {Large} {Photonic} {Multipartite} {Entangled} {States} with {Group}-{IV} {Color} {Centers} in {Diamond}},
	url = {http://arxiv.org/abs/2312.03952},
	doi = {10.48550/arXiv.2312.03952},
	abstract = {Measurement-based quantum computation relies on single qubit measurements of large multipartite entangled states, so-called lattice-graph or cluster states. Graph states are also an important resource for quantum communication, where tree cluster states are a key resource for one-way quantum repeaters. A photonic realization of this kind of state would inherit many of the benefits of photonic platforms, such as very little dephasing due to weak environmental interactions and the well-developed infrastructure to route and measure photonic qubits. In this work, a linear cluster state and GHZ state generation scheme is developed for group-IV color centers. In particular, this article focuses on an in-depth investigation of the required control operations, including the coherent spin and excitation gates. We choose an off-resonant Raman scheme for the spin gates, which can be much faster than microwave control. We do not rely on a reduced level scheme and use efficient approximations to design high-fidelity Raman gates. We benchmark the spin-control and excitation scheme using the tin vacancy color center coupled to a cavity, assuming a realistic experimental setting. Additionally, the article investigates the fidelities of the Raman and excitation gates in the presence of radiative and non-radiative decay mechanisms. Finally, a quality measure is devised, which emphasizes the importance of fast and high-fidelity spin gates in the creation of large entangled photonic states.},
	urldate = {2023-12-11},
	publisher = {arXiv},
	author = {Pieplow, Gregor and Strocka, Yannick and Isaza-Monsalve, Mariano and Munns, Joseph H. D. and Schröder, Tim},
	month = dec,
	year = {2023},
	note = {arXiv:2312.03952 [quant-ph]},
	keywords = {Quantum Physics},
}

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