Xi'an optical machine where the quantum optics integrated chip has made important progress
Supported by the Class B strategic pilot science and technology project "Large-Scale Photonic Integrated Chip" of the Chinese Academy of Sciences, Xi'an Institute of Optics and Electronics cooperates with many foreign scientific research institutes. Based on the photonic chips developed by Xiguang and based on multiple high-purity frequency modes Coherent superposition of the unique program to solve the on-chip high-dimensional entangled two-photon state preparation and control of the international problems, the use of 10-level entangled two-photon state to achieve ultra-100-dimensional on-chip quantum system and frequency control achieved quantum state Flexible control. Relevant results published in June 2017 in the internationally renowned journal Nature. The photon quantum system based on entangled photons is the core foundation for solving many problems in modern quantum physics and quantum information science. With the deepening of quantum information research, in addition to multi-photon entanglement, high-dimensional qubits have drawn much attention due to their much higher information carrying capacity than qubits, which has become a deep study of quantum mechanisms Research, improve the robustness and speed of quantum communication protocols, and key tools for more efficient quantum computing. High dimensional quantum state generation and control experiment device Relying on its own air distribution system, the compressed air enters the front and rear air chambers of the piston (hammer) alternately, so that the piston reciprocates continuously. The alloy ball teeth break the rock. According to the structural characteristics of the gas distribution system, the DTH hammer is divided into two types: valve type and valveless type.
(1) DTH hammer with valve. The air flow is controlled by the valve plate, and can be divided into side exhaust and central exhaust according to the exhaust mode. The side-exhaust valve DTH hammer is the earliest used, and its exhaust gas is discharged from the side of the hammer head. The exhaust gas of the central exhaust valve DTH hammer is discharged from the central hole of the hammer head. In comparison, the effect of removing cuttings by the central exhaust method is good, the service life of the hammer head is long, and the drilling efficiency is high.
(2) Valveless DTH hammer. There is no valve plate, and its gas distribution system consists of a group of holes arranged on the cylinder wall, which automatically distributes gas during the movement of the piston. In the total stroke of the piston movement, one section relies on the expansion of compressed air to do work. Under the same pressure conditions, the consumption of compressed air is only 2/3 of that of the valved DTH hammer.
According to the working pressure, the DTH hammer is divided into low pressure DTH hammer (0.5~0.7MPa), medium pressure DTH hammer (0.56~1.05MPa) and high pressure DTH hammer (0.56~2.46MPa), which are suitable for different working conditions. Down The Hole Bits,Dth Hammer,Down Hole Hammer Bits,Down Hole Hammer Drill Bits Gansu Lanzhou and Wuwei International Land Port Management and Operation Co.Ltd. , https://www.gslwyygs.com