Search results for: Alice & Bob

2024 has seen an unprecedented wave of quantum computing roadmaps, with thirteen players either announcing new development paths or significantly updating existing ones. Never before has the industry seen such a concentrated period of concrete technical commitments and public timelines, marking a shift from general promises to specific, measurable goals. Recent Roadmap Announcements The following list summarizes this year’s developments: New Roadmaps QuEra Computing (January 2024): Three-year roadmap through 2026, targeting 100 logical qubits. Infleqtion (February 2024): Four-year roadmap through 2028, planning for over 100 logical qubits with 40,000 physical qubits. Pasqal (March 2024): Five-year roadmap through 2028+, targeting fault-tolerant quantum [...]

Figure. QEYSSat: A quantum receiver in space. Credit: Canadian Space Agency by Amara Graps It’s a simple idea.  XOR, ⊕, is a bitwise operator, that means "exclusive or." The logical operation it performs, is: if the input bits are the same, then the output bit will be false (0) else true (1). XOR table: XYX⊕ Y000011101110 How Quantum Key Distribution (QKD) Works  Quantum Key Distribution (QKD) is built upon the XOR. How does that work?  Let X = a sender: Alice, and Y = a receiver: Bob. From Alice’s and Bob’s shared key, which is a binary string, Alice’s binary message to [...]

We have reported recently on many developments in fault tolerant computer research with many different codes such as the surface code and q-LDPC (Quantum Low Density Parity Check) being researched. But a big concern about many of these error correction codes is the large overhead they will require in order to achieve a low enough error rate for a usable quantum advantage. For example, several proposed implementations of the surface code would require 1000 physical qubits to create one logical qubit with an acceptable error rate. Recently, we have started see a few efforts to develop codes or technologies that have [...]

Riverlane, a global leader in quantum error correction technology, has announced its membership in the Quantum Energy Initiative (QEI). This global community of quantum technology companies and research organizations aims to minimize the environmental footprint of quantum technologies. Riverlane’s core product, the Quantum Error Correction Stack (Deltaflow), is being developed with a focus on energy efficiency. QEI members, including Microsoft Azure Quantum, IBM Quantum, and Alice & Bob, collaborate to define energy-based metrics for quantum technologies, derive fundamental bounds for energy consumption, use energetic efficiencies as optimization tools, and understand the impact of hardware and software on energy consumption. Riverlane’s Deltaflow.Decode [...]

Nature Magazine Cover of the Issue with IBM's aLDPC Paper Showing the Torus Topologies Used in this Code. Credit: IBM IBM's Research in qLDPC Codes The popular press is buzzing with IBM's announcement that they have published an article about the research of qLDPC (Quantum Low Density Parity Check) codes in Nature magazine. But attentive readers of the Quantum Computing Report will note that we first reported about this last August when the preprint of this paper describing this research was first posted on the arXiv and again this last December in our article about IBM's roadmap. LDPC codes are a [...]

Credit: Journal of Physical Chemistry Chemical Physics If you had asked us six months ago, when we thought fault tolerant quantum computers would become available, we would have estimated some time around the 2030 timeframe. We would have indicated that between now and 2030, available quantum computers would all be NISQ based and that a few users would be able to figure out how to use these NISQ machines to achieve quantum advantage for a few applications during this period. But over the past few months, we have seen a large number of technical papers and roadmaps that indicate what we [...]

Progress report three years after the launch of the national strategy for quantum technologies and launch of the PROQCIMA program In a bid to make France the center of gravity of the global quantum industry, the government has launched a French National Strategy for quantum that included projected investments of €1 billion ($1.1B USD) from the government over a four year period with additional investments being made by the private sector. France has made considerable progress is enjoying significant quantum startup activity and private funding in the country as well as gains in attracting and developing talent. To further accelerate progress [...]

By Prof Michael J Biercuk, CEO and Founder, Q-CTRL Excitement about the era of Quantum Error Correction (QEC) is reaching a fever pitch. This has been a topic under development for many years by academics and government agencies as QEC is a foundational concept in quantum computing.  More recently, industry roadmaps have not only openly embraced QEC, but hardware teams have also started to show convincing demonstrations that it can really be implemented to address the fundamental roadblock for quantum computing - hardware noise and error. This rapid progress has upended notions that the sector could be stagnating in so-called NISQ [...]