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[ Hot Focus on Chemical Machinery and Equipment Network ] Precision measurement is the foundation of scientific research.
With the improvement of measurement accuracy, communication and navigation technologies are also developing, which not only makes social life more and more convenient, but also provides more and more scientific experiments.
The more convenient tool
.
Quantum precision measurement is to use the rules of quantum mechanics, especially the consistency of the basic quantum system, to measure some key physical quantities with high precision and high sensitivity
.
Chemical machinery and equipment network hotspots focus on chemical machinery and equipmentWith the improvement of measurement accuracy, communication and navigation technologies are also developing, which not only makes social life more and more convenient, but also provides more and more scientific experiments.
The more convenient tool
.
Quantum precision measurement is to use the rules of quantum mechanics, especially the consistency of the basic quantum system, to measure some key physical quantities with high precision and high sensitivity
.
On February 23, researchers at the University of Birmingham in the United Kingdom published a study in the journal "Nature" saying that the world's first quantum gravity gradiometer under non-laboratory conditions has come out
.
The sensor , which uses quantum technology to find objects hidden underneath, works by using the principles of quantum physics to detect changes in microgravity, measuring the subtle changes in the pull of the gravitational field as a cloud of atoms falls
.
The sensor, which uses quantum technology to find objects hidden in the ground, is a long-awaited milestone that will have far-reaching implications for academia, industry and national security
.
sensor.
The sensor , which uses quantum technology to find objects hidden underneath, works by using the principles of quantum physics to detect changes in microgravity, measuring the subtle changes in the pull of the gravitational field as a cloud of atoms falls
.
The sensor, which uses quantum technology to find objects hidden in the ground, is a long-awaited milestone that will have far-reaching implications for academia, industry and national security
.
The first quantum gravimeter "out of the lab"
The traditional gravimeter can be equivalent to a suspended spring with mass, and the change of gravity is reflected by the expansion and contraction of the spring.
However, since the expansion and contraction of the spring itself is affected by the ground vibration, the traditional gravimeter needs to be continuously calibrated to maintain Accuracy of measurements and waiting long enough for each reading to average out the effects of background noise from ground vibrations that are not limited to passing trucks, trains, and low-intensity seismic activity etc.
_
However, since the expansion and contraction of the spring itself is affected by the ground vibration, the traditional gravimeter needs to be continuously calibrated to maintain Accuracy of measurements and waiting long enough for each reading to average out the effects of background noise from ground vibrations that are not limited to passing trucks, trains, and low-intensity seismic activity etc.
_
However, the quantum gravity gradiometer has only one overall movement mode, and there is no elastic feature similar to a spring.
The quantum gravity meter device, atomic group and the laser that detects the falling of atoms will move together, which can eliminate unnecessary sensitive sources and suppress the ground.
Noise such as vibration, thereby improving sensitivity
.
Quantum gravimeters can be used more widely in more places and make measurements faster, more efficient and more accurate
.
The quantum gravity meter device, atomic group and the laser that detects the falling of atoms will move together, which can eliminate unnecessary sensitive sources and suppress the ground.
Noise such as vibration, thereby improving sensitivity
.
Quantum gravimeters can be used more widely in more places and make measurements faster, more efficient and more accurate
.
In January 2021, after 15 years of painstaking research, the team of the Gravitational Center of Huazhong University of Science and Technology conquered the key technologies of quantum gravimeters such as matter wave interference, ultra-low frequency vibration isolation, and equipment miniaturization, and successfully developed China's first high-precision absolute gravimeter.
.
People can put this gravimeter on the plane, and then do a CT for our earth under this sky.
When it analyzes the earth, it can not only know the mountains, rivers and minerals on the earth.
It can also help people find underground oil and gas resources
.
.
People can put this gravimeter on the plane, and then do a CT for our earth under this sky.
When it analyzes the earth, it can not only know the mountains, rivers and minerals on the earth.
It can also help people find underground oil and gas resources
.
But before that, quantum gravimeters were not commonly used in geophysics.
In order to eliminate vibration, instrument tilt, and interference from magnetic and thermal fields, quantum gravimeters had to probe at one location for a long enough time, accumulating large amounts of data, which was expensive , making the translation of quantum theory into commercial reality challenging
.
In order to eliminate vibration, instrument tilt, and interference from magnetic and thermal fields, quantum gravimeters had to probe at one location for a long enough time, accumulating large amounts of data, which was expensive , making the translation of quantum theory into commercial reality challenging
.
The breakthrough of the Birmingham Quantum Sensor, which has opened a successful commercial path, is the first project to meet these real-world challenges and conduct high-spatial-resolution surveys
.
Eliminating noise due to vibration will "unlock" high spatial resolution gravity mapping, greatly improving the rendering of geological topography
.
The newly developed quantum gravity gradiometer overcomes vibrations and various other environmental challenges
.
The breakthrough will make future gravimetric measurements cheaper and more reliable, with 10 times faster delivery, reducing the time needed for detection from a month to a few days
.
It has the potential to open up a range of new applications for gravimetry, offering a new perspective on what's underneath
.
.
Eliminating noise due to vibration will "unlock" high spatial resolution gravity mapping, greatly improving the rendering of geological topography
.
The newly developed quantum gravity gradiometer overcomes vibrations and various other environmental challenges
.
The breakthrough will make future gravimetric measurements cheaper and more reliable, with 10 times faster delivery, reducing the time needed for detection from a month to a few days
.
It has the potential to open up a range of new applications for gravimetry, offering a new perspective on what's underneath
.
Quantum gravimeter brings convenience to all walks of life
Quantum gravimeters play an important role in detecting rail culverts
.
Some rail culverts are buried deep beneath the track, even with ground penetrating radar, but the depth of detection is sometimes not sufficient, and engineers are often only able to take measurements for a few hours at night, making it difficult to confirm their location and assess its status
.
Quantum gravimeters, on the other hand, can measure faster because they don't have the noise of vibration, and they don't need to be stationary
.
This quantum gravimeter can be installed directly on the train and can scan the rails as the train moves
.
.
Some rail culverts are buried deep beneath the track, even with ground penetrating radar, but the depth of detection is sometimes not sufficient, and engineers are often only able to take measurements for a few hours at night, making it difficult to confirm their location and assess its status
.
Quantum gravimeters, on the other hand, can measure faster because they don't have the noise of vibration, and they don't need to be stationary
.
This quantum gravimeter can be installed directly on the train and can scan the rails as the train moves
.
In the field of ocean navigation, quantum gravimeters can also be used to enhance the effectiveness of navigation systems
.
On the premise of drawing an accurate gravity net, the ship can use the quantum gravimeter it carries to record the gravity value and compare it with the gravity net to determine its own position
.
And quantum gravimeters are not as easily hacked as a ship's communications, satellite and radar navigation systems, or even anything that can connect to the outside world.
The only way to significantly interfere with a gravity sensor is to change the gravity signal, which means moving a mountain.
Such great quality
.
.
On the premise of drawing an accurate gravity net, the ship can use the quantum gravimeter it carries to record the gravity value and compare it with the gravity net to determine its own position
.
And quantum gravimeters are not as easily hacked as a ship's communications, satellite and radar navigation systems, or even anything that can connect to the outside world.
The only way to significantly interfere with a gravity sensor is to change the gravity signal, which means moving a mountain.
Such great quality
.
Not only that, but quantum gravimeters can also be used to measure volcanic geology, providing changes in the density of subsurface materials such as rocks, gases, and magma
.
When gravity increases, it likely means the inflow of dense material such as magma; when gravity decreases, it means the presence of seepage pits
.
Gain a deeper understanding of the internal movements of volcanoes by inverting geophysical processes underground using gravity measurements on the volcano's surface
.
.
When gravity increases, it likely means the inflow of dense material such as magma; when gravity decreases, it means the presence of seepage pits
.
Gain a deeper understanding of the internal movements of volcanoes by inverting geophysical processes underground using gravity measurements on the volcano's surface
.
my country strengthens the construction of advanced measurement system with quantum metrology as the core
Recently, the "Measurement Development Plan (2021-2035)" (hereinafter referred to as the "Plan") issued by the State Council clearly stated that by 2035, a national modernization center with quantum metrology as the core, in line with the development needs of the times and the trend of international development will be built.
Advanced measurement system
.
The development of China's quantum precision measurement industry has ushered in new opportunities
.
Advanced measurement system
.
The development of China's quantum precision measurement industry has ushered in new opportunities
.
Metrology ability and measurement level are related to social stability and international status, and are an important foundation for scientific and technological innovation, industrial development, national defense construction, and people's livelihood security.
With the rapid economic and social development, advanced manufacturing, precision The demand for measurement testing has grown further
.
Using the high sensitivity of quantum state to the environment, quantum precision measurement of physical quantities such as time, position, acceleration, etc.
can be achieved beyond the limits of classical technology, and the accuracy of satellite navigation, underwater positioning, medical detection and gravitational wave detection can be greatly improved.
precision
.
With the rapid economic and social development, advanced manufacturing, precision The demand for measurement testing has grown further
.
Using the high sensitivity of quantum state to the environment, quantum precision measurement of physical quantities such as time, position, acceleration, etc.
can be achieved beyond the limits of classical technology, and the accuracy of satellite navigation, underwater positioning, medical detection and gravitational wave detection can be greatly improved.
precision
.
(Reference source: Science and Technology Daily, "Physics" journal)
Original title: Metrology enters the quantum era, quantum enters the scientific and technological life
