Dephasing in a quantum dot due to coupling with a quantum point contact

Key Points

• This research aims to understand how charge fluctuations in a quantum point contact affect the dephasing of a one-electron state in a quantum dot.
• Analyzed the dephasing rate influenced by the temperature and bias of a quantum point contact coupled to a quantum dot capacitively.
• Examined the link between shot noise at zero frequency and the dephasing rate.
• Dephasing rate depends on bias in a manner similar to shot noise at zero frequency.
• Observed that the contribution from the bias does not follow the |t|^2(1-|t|^2) suppression pattern.