Dynamical Scheme for Interferometric Measurements of Full-Counting Statistics

David Dasenbrook, Christian Flindt

Research output: Contribution to journalArticleScientificpeer-review

9 Citations (Scopus)
126 Downloads (Pure)

Abstract

We propose a dynamical scheme for measuring the full-counting statistics in a mesoscopic conductor using an electronic Mach-Zehnder interferometer. The conductor couples capacitively to one arm of the interferometer and causes a phase shift which is proportional to the number of transferred charges. Importantly, the full-counting statistics can be obtained from average current measurements at the outputs of the interferometer. The counting field can be controlled by varying the time delay between two separate voltage signals applied to the conductor and the interferometer, respectively. As a specific application, we consider measuring the entanglement entropy generated by partitioning electrons on a quantum point contact. Our scheme is robust against moderate environmental dephasing and may be realized thanks to recent advances in gigahertz quantum electronics.

Original languageEnglish
Article number146801
Pages (from-to)1-7
JournalPhysical Review Letters
Volume117
Issue number14
DOIs
Publication statusPublished - 30 Sep 2016
MoE publication typeA1 Journal article-refereed

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