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Move, TARDIS: Scientists have just announced that they have managed to go back in time using a quantum computer.
A team of scientists from the Institute of Physics and Technology of Moscow, the United States and Switzerland published its findings in Scientific reports, and said to have inverted the time of a fraction of a second on an IBM quantum computer, New York Daily News reported. In the report, scientists also determined the "likelihood that an electron in an empty interstellar space will come back randomly in its recent past," noted Phys.org.
Physicists invert time using #quantum computer @phystech_en @SciReports https://t.co/ww85quz2b7
– Phys.org (@physorg_com) March 13, 2019
According to the report, finding the origin of the "time arrow" remains a major scientific challenge. The scientists' experience challenges the second law of thermodynamics, which dictates the direction of events from the past to the future and involves the transition of energy within a system from usable to unusable, the Daily reported. Mail.
Most laws of physics do not distinguish between the past and the future, but scientists claim that their experience, which involved "inverting time", has shown that these laws can be violated. For their research, scientists were curious to know if individual particles could reverse impulsively.
To put this concept to the test, scientists formulated two distinct hypotheses: Time inversion would require super-system manipulation and "in most cases" would probably not occur in nature. Second, if a supersystem were to "emerge for a specific situation," a time reversal would need a "longer than universal life" time to function.
Steps of quantum computing experience. (Photo credit: @ tsarcyanide / Moscow Institute of Physics and Technology)
Scientists have attempted to reverse the time of a scattered electron using an IBM quantum computer. For the experiment, scientists used an "evolution program" that would have an impact on "qubits", also called quantum bits. A quantum bit is "the fundamental unit of information in a quantum computer, capable of existing in two states, 0 and 1, at the same time or at a different time," according to Dictionary.com.
Here's how it works: Following the launch of the evolution program, the particles would move to a changing pattern of zeros and ones. As a result of this dispersion, a program would change the state of the computer, allowing it to return to its original state. Then the pattern of evolution would be launched from the second state and would bring the qubits back to their original state and past tense.
According to the team, in 85% of cases, the two qubit quantum computer returned to its original state. When three qubits were involved in tests, more errors occurred and resulted in a success rate of about 50%. Scientists have said that the rate of error should decrease as more devices are designed. With this experience, inversion of time can help make quantum computers more accurate in the future.
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