Decoherence in solid-state qubits
By L. Chirolli, G. Burkard. 2008
189 citations recorded by the source corpus.
The interaction of solid-state qubits with environmental degrees of freedom strongly affects the qubit dynamics, and leads to decoherence. In quantum information processing with solid-state qubits, decoherence significantly limits the performances of such devices. Therefore, it is necessary to fully understand the mechanisms that lead to decoherence. In this review, we discuss how decoherence affects two of the most successful realizations of solid-state qubits, namely, spin qubits and superconducting qubits. In the former, the qubit is encoded in the spin 1/2 of the electron, and it is implemented by confining the electron spin in a semiconductor quantum dot. Superconducting devices show quantum behaviour at low temperatures, and the qubit is encoded in the two lowest energy levels of a superconducting circuit. The electron spin in a quantum dot has two main decoherence channels, a (Markovian) phonon-assisted relaxation channel, due to the presence of a spin–orbit interaction, and a (non-Markovian) spin bath constituted by the spins of the nuclei in the quantum dot that interact with the electron spin via the hyperfine interaction. In a superconducting qubit, decoherence takes place as a result of fluctuations in the control parameters, such as bias currents, applied flux and bias voltages, and via losses in the dissipative circuit elements.
Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/8b45cf1eebf407bfa8a3fe6939545ac9ae242c4d
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In Atomic and Molecular Physics, and Optics
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- Franco Nori
- Elisabetta Paladino
- Giuseppe Falci
- Iulia Maria Buluta
- Y. Galperin
- Boris L. Altshuler
- I. Georgescu
In Electrical and Electronic Engineering
Citations in the corpus
- 1 / f noise: Implications for solid-state quantum information (2013, background): “In this review, we will not focus on decoherence in semiconductor spin qubits, which has been extensively reviewed, e. g., by Chirolli and Burkard (2008).”
- Natural and artificial atoms for quantum computation (2010, background): “However, long coherence times [120, 122] have been measured for both quantum dots (∼μs) [126, 127, 128, 129, 132] and NV centers (>5 ms) [124].”