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Isotope-Purificatio...
Isotope-Purification-Induced Reduction of Spin-Relaxation and Spin-Coherence Times in Semiconductors
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- Bulancea Lindvall, Oscar (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Eiles, Matthew T. (författare)
- Max Planck Inst Phys Komplexer Syst, Germany
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- Nguyen, Son Tien (författare)
- Linköpings universitet,Halvledarmaterial,Tekniska fakulteten
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- Abrikosov, Igor (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten
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- Ivády, Viktor (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Max Planck Inst Phys Komplexer Syst, Germany; Eotv Lorand Univ, Hungary; MTA ELTE Lendulet Momentum NewQubit Res Grp, Hungary
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(creator_code:org_t)
- AMER PHYSICAL SOC, 2023
- 2023
- Engelska.
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Ingår i: Physical Review Applied. - : AMER PHYSICAL SOC. - 2331-7019. ; 19:6
- Relaterad länk:
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https://liu.diva-por... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Paramagnetic defects and nuclear spins are often the major sources of decoherence and spin relaxation in solid-state qubits realized by optically addressable point defect spins in semiconductors. It is commonly accepted that a high degree of depletion of nuclear spins can enhance the coherence time by reducing magnetic noise. Here we show that the isotope purification beyond a certain optimal level can become contraproductive when both electron and nuclear spins are present in the vicinity of the qubits, particularly for half-spin systems. Using state-of-the-art numerical tools and considering the silicon-vacancy qubit in various spin environments, we demonstrate that the coupling of the spin-3/2 qubit to a spin bath of spin-1/2 point defects in the lattice can be significantly enhanced by isotope purification. The enhanced coupling shortens the spin-relaxation time that in turn may limit the coherence time of spin qubits. Our results can be generalized to triplet point defect qubits, such as the nitrogen-vacancy center in diamond and the divacancy in silicon carbide.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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