Mesoscale system feedback-induced dissipation and noise suppression

US11035810B2 · kind B2 · utility

Assignee

• The Board of Trustees of the Leland Stanford Junior University · US

Inventors

• Chaitanya Gupta · Redwood City, US
• Ross M. Walker · Salt Lake City, US
• Boris Murmann · Palo Alto, US
• Roger T. Howe · Lafayette, US

Key dates

• Filing date: Apr 27, 2017
• Grant date: Jun 15, 2021
• Expiry date: Nov 28, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/49
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A high-gain and low-noise negative feedback control (“feedback control”) system can detect charge transfer in quantum systems at room temperatures. The feedback control system can attenuate dissipative coupling between a quantum system and its thermodynamic environment. The feedback control system can be integrated with standard commercial voltage-impedance measurement system, for example, a potentiostat. In one aspect, the feedback control system includes a plurality of electrodes that are configured to electrically couple to a sample, and a feedback mechanism coupled to a first electrode of the plurality of electrodes. The feedback mechanism is configured to detect a potential associated with the sample via the first electrode. The feedback mechanism provides a feedback signal to the sample via a second electrode of the plurality of electrodes, the feedback signal is configured to provide excitation control of the sample at a third electrode of the plurality of electrode.