Progress in engineering ion trap quantum computing Qico Quantum releases ion trap cryogenic vacuum system
Recently, Q-Tech Quantum has officially released the engineered ion trap cryogenic vacuum system <Aba|Qu|Cryovac> ("<Aba|Qu|Cryovac>"), which is the third time this year that Q-Tech Quantum has released its important progress in the engineering of ion trap quantum computing. This system is an integrated working environment system tailored for distributed ion trap quantum computers, which integrates ultra-high vacuum, ultra-low temperature, and optical platforms, with advantages of more compact size, simpler structure, and more convenient operation.
Ion traps have multiple requirements for the operating environment. First, the ion trap must be provided with a high vacuum liquid helium temperature environment; second, the ion trap must be provided with reduced space electromagnetic noise; and finally, the ion trap must be provided with the necessary laser incidence channels, photon collection channels, and electrical signal input and output channels.
The ion trap working environment system is the "infrastructure" of ion trap quantum computing, and its performance directly affects the ion confinement stability, the number of quantum bits, quantum logic gate fidelity and other important indexes of quantum computers. Although cryogenic vacuum systems have been applied in various universities and research institutions, most of them have not been reasonably designed for engineering. It is not only bulky, complex system, difficult to use and maintain, but also the system generates vibration in operation, and it is a great challenge for the researchers to solve these problems.
Figure 1: Cryogenic vacuum system developed by a foreign ion trap R&D team
Figure 2: Appearance of <Aba|Qu|Cryovac
Figure 3: <Aba|Qu|Cryovac> sample vacuum cavity module
The most important feature of the <Aba|Qu|Cryovac> system developed by Qisan is the organic integration of the four core elements of cryogenic, vacuum, electrical and optical, which is mainly reflected in the following three aspects.
1, modular design of the ultra-high vacuum cavity: functional division according to optical section, electrical section, damping coupling section, vacuum acquisition section and cryogenic section, which facilitates the installation and maintenance of the devices in the cavity.
2, inverted installation design of the ultra-low temperature refrigeration system: firstly, closed cycle ultra-low temperature refrigeration equipment is used to provide the system with ultra-low temperature cold source as low as 4K, and then the ultra-low temperature refrigeration system is installed upside down under the optical platform, thus releasing the space above the optical platform. Researchers can directly build the ion trap optical system on the optical platform, providing a convenient way to carry out scientific research experiments.
3. Suspension-free design of vibration prevention and damping system: The vibration caused by the ultra-low temperature cooling system has been numerically calculated through numerical simulation technology, and a multi-stage flexible vibration isolation structure and vibration absorption components have been set up to reduce the vibration amplitude of the ion trap to the nanometer scale, thus improving the stability of the imprisoned ions and reducing the ion heating rate. Compared with the conventional gas-coupled vibration damping scheme, <Aba|Qu|Cryovac> does not require a separate suspension structure for the cryogenic cooler, which makes the system easier to install and maintain on the one hand, and makes the overall structure of the ion trap quantum computer more compact on the other.
In addition, the <Aba|Qu|Cryovac> also integrates the ultra-low temperature ion trap module <Aba|Qu|Cryovac>, miniature spiral resonator, low temperature DC filter assembly and other engineering components developed by Q-Tech Quantum, and makes the system more reliable and easier to install and debug through the rational design of intracavity alignment and electrical interface. The user only needs to disassemble the optical section and the electrical section of the vacuum chamber above the optical table for ion trap installation.
<Aba|Qu|Cryovac> can be used in other cutting-edge scientific research fields such as spectroscopy and atomic physics, in addition to ion trap-related applications. In addition, it can provide custom development services for vacuum cavities and internal sample cavities to meet the special needs of different application scenarios according to customer requirements.
The successful development of <Aba|Qu|Cryovac> marks a new stage of 2.0 in the development of Qico Quantum Distributed Quantum Computing Engineering Machine. Compared with the modularity of 1.0, 2.0 highlights integration more prominently, which not only provides a structural framework for the integration of subsequent optical systems and measurement and control systems, but also lays the foundation for the future design of distributed ion trap computing units. It is reported that the <Aba|Qu|Cryovac> system will be offered to domestic and foreign research institutions, universities and colleges at a favorable price, greatly accelerating the popularity of ion trap quantum computing.
