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Fermion-parity qubi...
Fermion-parity qubit in a proximitized double quantum dot
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- Geier, Max (författare)
- Niels Bohr Institute,Massachusetts Institute of Technology (MIT),Massachusetts Institute of Technology
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- Souto, Rubén Seoane (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Niels Bohr Institute,CSIC Instituto de Ciencia de Materiales de Madrid (ICMM),Condensed Matter Physics Center (IFIMAC)
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- Schulenborg, Jens, 1988 (författare)
- Chalmers University of Technology,Niels Bohr Institute
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- Asaad, Serwan (författare)
- Niels Bohr Institute
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- Leijnse, Martin (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,LTH profilområde: Nanovetenskap och halvledarteknologi,LTH profilområden,LU profilområde: Ljus och material,Lunds universitets profilområden,Other operations, LTH,Faculty of Engineering, LTH,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH,LTH Profile Area: Nanoscience and Semiconductor Technology,LTH Profile areas,Faculty of Engineering, LTH,LU Profile Area: Light and Materials,Lund University Profile areas,Niels Bohr Institute
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- Flensberg, Karsten (författare)
- Niels Bohr Institute
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(creator_code:org_t)
- 2024
- 2024
- Engelska.
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Ingår i: Physical Review Research. - 2643-1564. ; 6:2
- Relaterad länk:
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https://research.cha... (primary) (free)
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http://dx.doi.org/10... (free)
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Bound states in quantum dots coupled to superconductors can be in a coherent superposition of states with different electron number but with the same fermion parity. Electrostatic gating can tune this superposition to a sweet spot, where the quantum dot has the same mean electric charge independent of its electron-number parity. Here, we propose to encode quantum information in the local fermion parity of two tunnel-coupled quantum dots embedded in a Josephson junction. At the sweet spot, the qubit states have zero charge dipole moment. This protects the qubit from dephasing due to charge noise acting on the potential of each dot, as well as fluctuations of the (weak) interdot tunneling. At weak interdot tunneling, relaxation is suppressed because of disjoint qubit states. However, for strong interdot tunneling the system is protected against noise affecting each quantum dot separately (energy-level noise, dot-superconductor tunneling fluctuations, and hyperfine interactions). Finally, we describe initialization and readout as well as single-qubit and two-qubit gates by pulsing gate voltages.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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