We demonstrate real-time detection of self-interfering electrons in a double quantum dot embedded in an Aharonov-Bohm interferometer, with visibility approaching unity. We use a quantum point contact as a charge detector to perform time-resolved measurements of single-electron tunneling. With increased bias voltage, the quantum point contact exerts a back-action on the interferometer leading to...

In this work we analyze the noise properties of the current at the hard-breakdown of a 6 nm thick oxide in an MOS structure. It is shown that in the quantum point contact case single fluctuators, probably consisting of electron traps inside the oxide, can be resolved, whereas the current noise at the thermal breakdown presents a 1 /f spectrum, due to the averaging process between many of these ...

This study explores a new security problem existing in various state-ofthe-art quantum private comparison (QPC) protocols, where a malicious third-party (TP) announces fake comparison (or intermediate) results. In this case, the participants could eventually be led to a wrong direction and the QPC will become fraudulent. In order to resolve this problem, a new level of trustworthiness for TP is...

In this paper we review the structure of the conserving sum rules in the mesoscopic regime, from the weakest driving fields to the strongest. As compact quantitative expressions of the microscopic conservation laws, the sum rules entail a set of straightforward criteria to be met by proper theoretical descriptions of metallicelectron behavior. As we discuss below, these criteria are quite enoug...