IBM and Google develop functioning quantum computers

IBM and a Canadian company called D-Wave have created a device that could solve a number of problems in fields including chemistry and physics. Functioning quantum computers use different approaches.

One of the shortcomings is considered to be the devices could not be easily scalable to qubits required for solving problems in which conventional computers lack. Explaining in the journal Nature, the researchers involved in the project said that the development is full of important facts for the quantum computing community.

Daniel Lidar, a quantum-computing expert at the University of Southern California in Los Angeles said that Google prototype works on two main approaches of quantum computing. In the first approach, the computer’s digital circuits use qubits in a specific matter to solve specific problems.

As per the researchers, the majority of quantum computing is dependent on this approach. Another approach is known as adiabatic quantum computing (AQC). In this approach, the computer encodes a problem in the state of qubits. It is said that any problem can be encoded in the same way.

Computer scientist Rami Barends said that but this method has a shortcoming, as it is limited by the effects of random noise. There is no guarantee that the method could solve every work with the same level of efficacy.

But then also AQC has been used in the first commercial devices made by D-Wave, which is available for around $15 million apiece. Google owns a D-wave device. Research team-members of Google said that there is a better way to carry out AQC.

There should be a way to do an error connection. Without it, upping AQC would be difficult. As per the team, the first step could be to combine the AQC method with the digital approach’s error-correction capabilities. It takes place as the research team uses a row of nine solid-state qubits.

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