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Forget Qubits – Scientists just built the quantum door with Qudits



Just as quantum computers have their own bit versions, known as cubes, they also need their own versions of logic gates that control the flow of information into the computer system.

A team at Purdue University has published a study in npj Quantum Information describing their creation of one of the first known quantum doors, including qudits, unlike the cubits, and can help in the quantum computing era. 19659004] The Bits and Qudits

Bits are essentially building blocks of today's classical computers. Each bit can store either 1 or 0, and if you put enough bits, you can process a lot of information – but not as much as you can do with cubes.

Qubits are the quantum computing version of the bits, but instead of storing either 1

or 0, the cube can store both or not simultaneously, dramatically increasing the potential processing power of the computer.

The problem with the cuties is that they are extremely unstable. and this makes the creation of a system with many of them extremely difficult – the first IBM commercial quantum computer that was introduced in January, contains only 20 cubes, giving it much less computing power than conventional computers already in use, which can have hundreds of millions of logic gates

For several years, researchers have studied the value of cubes trading for a different quantum block: qudits. Instead of being limited to only two states like cubits, qudits can exist in more than two states – 0 and 1 and 2, for example – and for each added state, the ability to handle one qudit is increased.

In other words

Photon Fun

In order to create the quad gate with qudit included, the Purdue team begins by encoding four qudits in two entangled photons in two areas – frequency and time. The team has chosen photons because they are not easily disturbed by their environment, and the use of multiple domains allows them to achieve greater binding by using fewer photons.

"Photons are expensive in the quantum sense because they are difficult to generate and control," says researcher Poolad Imany in a press release, "so it's ideal to pack as much information into any photon as possible."

The completed port has 20 cubic equivalents of computing power, although it only requires the use of four qudits, thanks to the added stability of photons – making it a promising system for future quantum computers. ]

More about qudits: The new breakthrough job finally reveals the quantum "fingerprints"


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