{"id":178595,"date":"2023-12-18T12:27:40","date_gmt":"2023-12-18T18:27:40","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2023\/12\/updating-how-we-measure-quantum-quality-and-speed"},"modified":"2023-12-18T12:27:40","modified_gmt":"2023-12-18T18:27:40","slug":"updating-how-we-measure-quantum-quality-and-speed","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2023\/12\/updating-how-we-measure-quantum-quality-and-speed","title":{"rendered":"Updating how we measure quantum quality and speed"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/updating-how-we-measure-quantum-quality-and-speed3.jpg\"><\/a><\/p>\n<p>IBM introduces introducing two new metrics \u2014 error per layered gate (EPLG) and CLOPSh \u2014 to fully encapsulate the performance of 100+ qubit processors powering this utility-scale era.<\/p>\n<hr>\n<p>Layer fidelity provides a benchmark that encapsulates the entire processor\u2019s ability to run circuits while revealing information about individual qubits, gates, and crosstalk. It expands on a well-established way to benchmark quantum computers, called randomized benchmarking. With randomized benchmarking, we add a set of randomized Clifford group gates (that\u2019s the basic set of gates we use: X, Y, Z, H, SX, CNOT, ECR, CZ, etc.) to the circuit, then run an operation that we know, mathematically, should represent the inverse of the sequence of operations that precede it.<\/p>\n<p>If any of the qubits do not return to their original state by the inverse operation upon measurement, then we know there was an error. We extract a number from this experiment by repeating it multiple times with more and more random gates, plotting on a graph how the errors increase with more gates, fitting an exponential decay to the plot, and using that line to calculate a number between 0 and 1, called the fidelity.<\/p>\n<p>So, layer fidelity gives us a way to combine randomized benchmarking data for larger circuits to tell us things about the whole processor and its subsets of qubits.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>IBM introduces introducing two new metrics \u2014 error per layered gate (EPLG) and CLOPSh \u2014 to fully encapsulate the performance of 100+ qubit processors powering this utility-scale era. Layer fidelity provides a benchmark that encapsulates the entire processor\u2019s ability to run circuits while revealing information about individual qubits, gates, and crosstalk. It expands on a [\u2026]<\/p>\n","protected":false},"author":709,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1523,1617],"tags":[],"class_list":["post-178595","post","type-post","status-publish","format-standard","hentry","category-computing","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/178595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/709"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=178595"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/178595\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=178595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=178595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=178595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}