The world’s smallest computer “tiny” when standing next to a grain of rice

In March this year, the giant IBM released “the world’s smallest computer” with a size smaller than a grain of raw salt. But scientists have not let this technology firm be proud for long.

Researchers at the University of Michigan in the US have created a “sensor” heat sensor with a volume of 0.04 m3, which is one-tenth the size of its “1” x 1mm predecessor. IBM. It was so small, so small that when standing next to it, a grain of rice also became giant – it was so sensitive, so sensitive that it could receive light to convert into electricity. The device has a microprocessor, system memory, and wireless transceivers that can receive and send information via light.

The size restrictions forced researchers to devise new methods in circuit design to reduce the impact of light. They switched from diodes to capacitors and had to deal with the increase in electrical noise due to running a device that used too little power.

The result of the study is a sensor sensitive enough to capture changes in temperature (with an error of 0.1 degrees Celsius) in an extremely small area, such as a group of cells in your body. Scientists have long suspected that tumors are a little hotter than healthy tissue, but so far this has not been proven. This tiny device can test the hypothesis, and if that is verified to be true, it will always evaluate the effectiveness of cancer treatments. The team also hopes the machine can also help diagnose glaucoma, monitor biochemical processes and even study tiny snails.

So why call this device a computer? Its tiny size causes the University of Michigan to ask the question what is a computer? It has a fully functional processor (based on the design of the ARM Cortex-M0 + processor), but it loses all data when it loses power, just like an IBM device. This can cause those who are not demanding it is a computer.

However, the advent of this “world’s smallest computer” certainly created new limits for computing devices and evoked the idea of ​​nearly invisible computers that could Will become popular in the near future.

Science experiment: Does time also exist in quantum entanglement?

Quantum mechanics is one of the basic theories of physics. It studies motion and physical quantities related to motion such as the energy and momentum of small objects, where the wave-particle duality is clearly shown.

Well-known quantum physicist Niels Bohr once said: “If quantum mechanics does not surprise you, you do not understand anything about it.” And yes, at least quantum mechanics is a difficult thing to understand. For the unskilled, quantum mechanics studies ‘reality’ at the smallest possible level (at current scientific level). Basically, it studies matter at the “quantum” scale. What is puzzling about quantum mechanics is the laws of regulation which differ significantly from classical physics.

Quantum entanglement

Quantum entanglement, also known as quantum entanglement (quantum entanglement) is an effect of quantum mechanics in which the quantum states of two or more objects are related, though how far apart they are. For example, it is possible to create two objects so that if the spin of the first object is observed, the spin of the other object will have to spin upwards, or vice versa; although quantum mechanics does not predict the results of measurements on the first object. This means that the measurement made on this object will directly affect the quantum state on the quantum entangled object with it.

While alive, Einstein thought that quantum entanglement was an “unacceptable” phenomenon, because it asserted that the “space” between physical entities was actually not as empty as the senses of We still feel, that information can travel faster than the speed of light, even information is transmitted immediately without losing time to travel.

A 2017 study published in Science describes how scientists were able to create entangled quantum entangled photons on a satellite orbiting the Earth nearly 500 km away and transmit them. The two laboratories on the ground are 1,200 km apart while maintaining the entanglement between particles. [first]

According to the Washington Post, “this is the first time humans have created particles entangled in space, and a 10-fold increase in the distance between particles is entangled.”

Does time have quantum entanglement?

Quantum entanglement refers to the connection being maintained in ‘space’, but this phenomenon also occurs over time.

In 2013, a group of physicists at the Hebrew University of Jerusalem reported that they successfully entangled photons that did not co-exist (created at two different times). [2]

Experimental description shows that photo 1 and photon 4 have quantum entanglement, although they are created by two different times. Note: Timeline of photons. (I) photons 1 and 2 are born. (II) photon 1 is recorded. (III) photon 3 and 4 are born. (IV) determine photon values ​​2 and 3. (V) record photon 4.

Previous experiments involving a technique called “entanglement swapping” have shown quantum correlations over time, by delaying the measurement of one of the entangled particles. create concurrently; but Eli Megidish and his colleagues were the first to show the entanglement between photons that were not created simultaneously.

Elise Crull, lecturer in history science and philosophy at New York City University, explained:

“Previous experiments involving a technique called” entanglement swapping “have shown quantum correlation over time, by delaying the measurement of one of the entangled particles that produce copper. time; but Eli Megidish and his colleagues were the first to show the entanglement between photons whose overlaps do not overlap. ”

Data show that the existence of quantum correlations between temporal nonlocal photons, meaning that entanglement can occur on two quantum systems has never existed at the same time. (both in time and space).

Megidish and colleagues took an easier example to explain their “bizarre” experimental results:

What does this mean? Obviously, someone would have trouble saying that the polarization of a star’s light in a distant past – twice the age of Earth – affects the polarization of light. Bright stars come into your amateur telescope this winter. Even stranger: it may indicate that the measurements are made by your eyes when a starlight enters your telescope this winter, somehow determining the polarization of the photons. over 9 billion years old. ”

The delayed choice quantum experiment, also known as the quantum eraser experiment, is another proven and repeated test. For example, physicists at the Australian National University (ANU) performed John Wheeler’s imagination experiment on delayed options, the results of which were recently published in Nature Physics. It shows that what happened in the past can affect the future and vice versa. [3]

In 2007, scientists in France fired photons at a device and showed that their actions could revive what happened. (Sciene Magazine – Science, No. 315, 966, 2007)

“If we try to assign an objective meaning to the quantum state of a single system, strange paradoxes appear: mimic quantum effects do not just act at a distance in a way. immediately, as we see, the effect of future actions on past events, even after these events have been irrevocably recorded. ”- Asher Peres, who pioneered quantum information theory. [4] [5]

What is observed at the quantum scale is thought to not occur at the classical mechanical scale. For example, it is possible to teleportation an extremely small particle of matter from one location to another, but that does not happen with a full body or a physical object. enough. Or is it possible, just not fully understood the relationship between quantum scale and classical physical scale? Someday when humanity finds the answer, we will be able to create machines with the ability to change space and time, such as bringing the ability to teleport instantly … And in the present, these technologies are only emerging in conspiracy theories about UFO technology research.