Quantinuum announced that its flagship quantum computer achieved a quantum volume of 33.5\u202fmillion, a four\u2011fold increase over the 8\u202fmillion target set in a five\u2011year challenge met in May. The benchmark is the highest ever recorded, surpassing the next best system by a factor of 16\u202f000. The announcement appeared in a LinkedIn post dated one day ago, underscoring the company\u2019s continued leadership in quantum hardware performance. The quantum\u2011volume metric, devised by IBM in 2020, requires qubit count, gate fidelity, connectivity and other critical parameters to operate in concert.<\/p>\n
The test involves generating at least 100 random circuits, each pairing qubits, applying a randomly chosen two\u2011qubit gate, and repeating for a number of rounds equal to the qubit count. The output of each circuit is compared against a full state\u2011vector simulation using a heavy\u2011output\u2011probability (HOP) test; a system passes if the average HOP exceeds two\u2011thirds with a two\u2011sigma confidence level.<\/p>\n
IBM Originated Benchmark Quantinuum Leads Since 2021<\/p>\n
Since 2021, Quantinuum has consistently topped IBM\u2019s quantum\u2011volume benchmark, which is a system\u2011level assessment demanding reliable performance across all architecture elements. The assessment generates a suite of no fewer than 100 random circuits, each applying a two\u2011qubit gate chosen from the device\u2019s native gate set and repeating for a number of rounds equal to the qubit count. The output distribution of each run is compared against a perfect state\u2011vector simulation; the average probability of the most probable outputs must exceed two\u2011thirds with a confidence interval equivalent to two standard deviations for the system to achieve that QV level. In addition to the QV test, Quantinuum evaluates its hardware using Greenberger\u2013Horne\u2013Zeilinger (GHZ) state fidelity. The protocol employs a logarithmic\u2011depth GHZ preparation sequence, after which populations and coherences of the resulting state are measured without any state\u2011preparation or measurement (SPAM) correction. A fidelity above 0.5 confirms genuine n\u2011body entanglement.<\/p>\n
On the 56\u2011qubit H2\u20111 device, the fidelity measurement satisfied this threshold, but the populations of the all\u2011zeros and all\u2011ones states were unequal, revealing a 20\u202f% probability of measuring a state other than the expected two, indicating asymmetry in SPAM errors. Parity measurements, which should oscillate between +1 and \u20131 with a period scaling with the number of qubits, further confirmed the presence of superposition. Quantinuum\u2019s public data set tracks heavy\u2011output frequency and GHZ fidelity improvements from 2020 through 2025, illustrating a clear trajectory of performance gains. The demonstrated 56\u2011qubit entanglement capability confirms that a high quantum volume reflects not only qubit count and gate fidelity but also the hardware\u2019s capacity to generate large, coherent entangled states, a prerequisite for algorithms such as quantum simulation and error\u2011correcting codes.<\/p>\n
Quantinuum announced that its new Helios system will be deployed later this year and is expected to raise performance to a level never before achieved, signalling a decisive step beyond the 33.5\u202fmillion quantum\u2011volume record. While the announcement did not disclose technical details, the implication is that Helios will push the limits of the quantum\u2011volume metric further than any existing platform, extending the reach of quantum computing hardware and offering customers access to unprecedented computational power. Helios is anticipated to scale qubit count and improve gate fidelity, thereby extending both quantum\u2011volume and GHZ\u2011fidelity performance and pushing the boundaries of practical quantum computing even further.<\/p>\n","protected":false},"excerpt":{"rendered":"Quantinuum announced that its flagship quantum computer achieved a quantum volume of 33.5\u202fmillion, a four\u2011fold increase over the…\n","protected":false},"author":2,"featured_media":155658,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[49,48,285,61],"class_list":{"0":"post-155657","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-computing","8":"tag-ca","9":"tag-canada","10":"tag-computing","11":"tag-technology"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/155657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/comments?post=155657"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/posts\/155657\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media\/155658"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/media?parent=155657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/categories?post=155657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/ca\/wp-json\/wp\/v2\/tags?post=155657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}