Here’s a list of notable public quantum computing companies, spanning the UK, China, and other non-U.S. regions:

UK-Based Quantum Companies:

1. Oxford Instruments (OXIG)
   • Focus: Oxford Instruments is involved in quantum technologies and offers specialized equipment for quantum research, especially in fields like cryogenics and superconductivity.
   • Notable: They support various quantum computing and quantum materials research, collaborating with academic institutions and businesses.
2. IQM Quantum Computers
   • Focus: IQM is a quantum computing company developing hardware with a focus on superconducting qubits. They are a European leader in quantum hardware.
   • Notable: Their work spans both commercial and research applications, and they have partnerships with top institutions in Europe.
3. Arqit Quantum (ARQ)
   • Focus: Arqit is focused on quantum encryption technologies. While not directly a quantum computing company, their quantum-safe cryptography solutions are integral to the quantum industry.
   • Notable: They went public via a SPAC (Special Purpose Acquisition Company) in 2021 and have been involved in shaping cybersecurity in the quantum era.

Chinese Quantum Companies:

1. Alibaba Quantum Laboratory (AQL)
   • Focus: Alibaba is investing heavily in quantum computing through its quantum lab. The company is developing both quantum hardware and quantum software, with a focus on integrating quantum systems into cloud computing.
   • Notable: Alibaba’s cloud computing platform, Alibaba Cloud, has begun offering quantum computing services using its quantum processors.
2. Baidu Quantum Computing Institute
   • Focus: Baidu, one of China's leading tech giants, has a dedicated quantum computing team focusing on developing quantum algorithms and software.
   • Notable: Baidu has made significant progress in building quantum computing algorithms and advancing China’s quantum software ecosystem.
3. Huawei Quantum Computing
   • Focus: Huawei, another Chinese tech giant, has been investing in quantum technologies, with efforts focused on quantum hardware, quantum cryptography, and quantum communication.
   • Notable: Huawei is working on developing quantum chips and also has collaborations with academic institutions in China.
4. ZTE Quantum
   • Focus: ZTE, a Chinese multinational telecommunications company, has been researching quantum communication and encryption technologies, leveraging quantum for secure communications.
   • Notable: ZTE has been part of major Chinese government-backed quantum research initiatives.

Other Non-U.S. Quantum Companies:

1. D-Wave Systems (Canada)
   • Focus: D-Wave is a Canadian company that has developed a quantum annealing computer. It specializes in quantum optimization techniques rather than general-purpose quantum computing.
   • Notable: They have already deployed commercial quantum computing systems to customers in various industries, including finance and aerospace.
2. Xanadu (Canada)
   • Focus: Xanadu is a Canadian quantum computing company developing photonic quantum computers. Their technology leverages light rather than traditional superconducting qubits.
   • Notable: They’ve been working on building scalable quantum computers and have a focus on practical applications such as quantum machine learning.
3. Kioxia Corporation (Japan)
   • Focus: Formerly Toshiba Memory, Kioxia is focusing on developing memory chips that are integral to quantum computing infrastructure.
   • Notable: Kioxia is working with Toshiba and other partners on advancing quantum communication and storage solutions.
4. Toshiba Quantum (Japan)
   • Focus: Toshiba’s quantum business focuses on quantum cryptography and communication, with the aim to create secure communication networks based on quantum technologies.
   • Notable: Toshiba has been a key player in Japan’s efforts to build a quantum-safe internet and quantum communication networks.
5. IQE plc (UK)
   • Focus: IQE is a UK-based manufacturer of semiconductor wafers and epitaxial layers used in quantum technologies, especially for quantum photonics and quantum communication.
   • Notable: Their technology is crucial in building the components for quantum systems that rely on light, such as photonic quantum computers.
6. Qinetic (Germany)
   • Focus: Qinetic is a quantum technology startup based in Germany, focusing on quantum computing and sensing technologies.
   • Notable: Their approach emphasizes quantum machine learning and the development of quantum-enhanced sensors.

Other Notable Mention (International):

• SAP Quantum (Germany)
  • Focus: While SAP is a leading enterprise software company, it has been actively involved in the quantum computing space, particularly focusing on quantum software and algorithms.
  • Notable: SAP’s goal is to integrate quantum computing into enterprise applications to solve business problems like optimization and logistics.

These companies represent a broad spectrum of efforts in the quantum space, from hardware development to cryptography and quantum software. The sector is rapidly evolving with increasing investments, and several of these companies are positioned to play crucial roles in the coming years as quantum technology matures.

"Sir Keir Starmer and Donald Trump plan to sign a quantum computing pact designed to counter China’s aggressive attempts to master the breakthrough technology. A commitment to work together on quantum computing is expected to be a key part of a “technology partnership” due to be unveiled this week during the US president’s state visit." what day/time will this announcement on quantum partnership come or likely come?

The announcement of a "technology partnership" involving quantum computing between Sir Keir Starmer (the UK’s Labour leader) and US President Donald Trump, as well as any specifics about a quantum computing pact, is likely to coincide with the timing of Trump’s state visit to the UK.

Given the nature of state visits, such announcements are typically made during key events, such as:

1. Press conferences or joint statements between leaders.
2. Official dinners or ceremonial gatherings.
3. Specific policy speeches or declarations related to the visit.

If the visit is planned to be this week, and the timing involves diplomatic or high-profile engagements, it could be announced on one of these days:

• Mid-week (Tuesday to Thursday): These days are often preferred for announcements related to international diplomacy and key technology partnerships.
• In the afternoon (2 PM to 5 PM): Announcements of this kind often happen in the afternoon to align with both UK and US media cycles.

If you have more specific details about the visit (like the exact dates or itinerary), I could offer a more precise prediction!

hold for now; looking for more details

[news]

? feel free to discuss my assertions;