BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Amr Hossameldin\, UVA\n\n
Macroscopic quantum phenomena\, such as observed in superfluids a nd superconductors\, have led to promising technological advancements and some of the most important tests of fundamental physics. At present\, quan tum detection of light is mostly relegated to the microscale\, where avala nche photodiodes are very sensitive to distinguishing single-photon events from vacuum but cannot differentiate between larger photon-number events. Beyond this\, the ability to perform measurements to resolve photon numbe rs is highly desirable for a variety of quantum information applications\, including computation\, sensing and cryptography. True photon-number reso lving detectors do exist\, but they are currently limited to the ability t o resolve on the order of 10 photons\, which is too small for several quan tum-state generation methods based on heralded detection. In this talk I&r squo\;ll explain how we extended photon measurement into the mesoscopic re gime by implementing a detection scheme based on multiplexing highly quant um-efficient transition-edge sensors to accurately resolve photon numbers between 0 and 100. Then I&rsquo\;ll demonstrate the use of our system by e xplaining how we implemented a quantum random-number generator with no inh erent bias. This method is based on sampling a coherent state in the photo n-number basis and is robust against environmental noise\, phase and ampli tude fluctuations in the laser\, loss and detector inefficiency as well as eavesdropping. Beyond true random-number generation\, our detection schem e serves as a means to implement quantum measurement and engineering techn iques valuable for photonic quantum information processing.< /p>\n DTSTART:20230327T200000Z LOCATION:Warner\, Room 110 SUMMARY:Resolution of 100 photons and quantum generation of unbiased random numbers END:VEVENT END:VCALENDAR