BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:iCalendar-Ruby BEGIN:VEVENT CATEGORIES:Lectures & Presentations DESCRIPTION:The Physics & Astronomy Colloquium Series presents Andreas Fuhr er for IBM Research of Zurich\, discussing “From Qubits to Transistors and Back" on Jan. 21.\n\nColloquia are Fridays at 4:10 p.m.\n\nJoin on your com puter or mobile app Click here to join the meeting Or call in (audio only) +1 614-706-6572\,\,461508116# United States\, Columbus Phone Conference I D: 461 508 116# Abstract: Superconducting qubits have seen tremendous impro vements in coherence over the past decade facilitated by improved circuit d esign\, fabrication processes\, integrated packaging and dedicated control hardware. However\, qubit coherence is known to depend on the microscopic e nvironment near the Josephson junctions affected e.g. by molecular adsorbat es or amorphous oxides. In order to study the impact of such defects we hav e developed a UHV-treatment system that allows us to clean the qubit chips using UV-light\, ion milling or active reagents such as ammonia before load ing the chips into the dilution refrigerator under vacuum. We show how thes e treatments affect qubit coherence and can be used to trim the qubit frequ ency of fixed frequency transmons after fabrication and without affecting c oherence. \n\n \n\nFuture universal quantum computing systems will require many such physical qubits in order to correct for errors that occur e.g. du e to the presence of defects. It is thus a highly attractive prospect to Ut ilize the ultra-scaled fabrication processes of classical transistor fabric ation for qubit fabrication. We show how silicon fin field-effect-transisto rs can be used as spin qubits. These devices have the advantage of being mu ch smaller than superconducting qubits and can be operated at temperatures up to 4K. This may allow for more integrated classical control circuitry ne ar the qubit devices\, alleviating some of the challenges with the much hig her device density in spin qubits. DTEND:20220121T220000Z DTSTAMP:20241123T041837Z DTSTART:20220121T211000Z LOCATION: SEQUENCE:0 SUMMARY:Physics Colloquium | From Qubits to Transistors and Back\, Jan. 21 UID:tag:localist.com\,2008:EventInstance_38959399649906 URL:https://calendar.ohio.edu/event/physics_colloquium_from_qubits_to_trans istors_and_back_jan_21 END:VEVENT END:VCALENDAR