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  Either zero or one? Does Taiwan have a chance to build an ion trap quantum computer?   "This is a gift from God, as long as you are willing to grasp it, you will have a chance," said Zhang Mingxian, an associate researcher at the Institute of Atomic and Molecular Sciences, Academia Sinica, when referring to the ion trap, a system technology that has a great chance of realizing quantum computing. Although quantum technology is still considered a "rainbow in the sky", the probability of return on investment seems to be either 1 or 0, but he believes that in this process of chasing technology, it can at least lay a good foundation for Taiwan's next generation of technology industry. Unlike traditional computers that process data with bits of 0 or 1, quantum computers use qubits as computing units. The biggest feature is that they can be 0 and 1 at the same time. If there are N Qubits, then they can have a superposition of 2^N basic states, representing 2^N states that exist at the same time, so they can show amazing quantum parallelism, improve the computing power of exponential acceleration, and quantum computers can therefore Parallel computing of large amounts of data. Therefore, the key technology to build a quantum computer lies in the design of qubits and the manipulation between bits. At present, several key systems include superconductors, semiconductors, photons or ion traps, etc. For example, IBM and Google use superconducting qubits as At the core of quantum computers, Intel chooses semiconductors. Compared with the choices of these big manufacturers, what are the advantages of ion traps?   What is quantum? Why use an ion trap?   Many people will wonder, what is quantum? Lin Junda, associate professor of the Department of Physics at National Taiwan University, explained that quantum is actually a concept, which is generally used to describe the discontinuity of the state of existence, rather than the particles we recognize like atoms, neutrons, protons, or electrons. Taking playing the guitar as an example, when the guitar string is plucked, a standing wave will be generated on the string, limited by the two ends being fixed, the basic mode shape that can be generated at this time is non-arbitrary and discontinuous. Even though different dialing methods will produce different shapes, these shapes can be decomposed into the superposition of those modes. The superposition state of quantum mechanics is also derived in this way. We can superimpose meaningful information corresponding to these modes, and realize qubits, which can then be processed in parallel by quantum computers. Now the ion trap quantum computer uses the state of the electrons carried by each ion as the carrier of the qubit. "Ion trap is a technology, and here it refers to a physical system. And we want to use this system to realize a quantum computer." Zhang Mingxian said that the ion trap invented as early as the 1950s is not a very new technology. More mature and important applications include mass spectrometers (note: instruments that use mass to measure and analyze substances). The ion trap mainly traps ions through the time-varying electric field and electrostatic field of several volts to kilovolts

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