FREDKIN GATE PDF

Griffith University Summary: Researchers have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realizing a challenging circuit -- the quantum Fredkin gate -- for the first time. They demonstrated this by experimentally realising a challenging circuit -- the quantum Fredkin gate -- for the first time. However, if larger bricks are used the same wall could be built with far fewer bricks," said Dr Patel. This is a gate where two qubits are swapped depending on the value of the third. The research team used the quantum entanglement of photons -- particles of light -- to implement the controlled-SWAP operation directly.

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Griffith University Summary: Researchers have overcome one of the key challenges to quantum computing by simplifying a complex quantum logic operation. They demonstrated this by experimentally realizing a challenging circuit -- the quantum Fredkin gate -- for the first time.

They demonstrated this by experimentally realising a challenging circuit -- the quantum Fredkin gate -- for the first time. However, if larger bricks are used the same wall could be built with far fewer bricks," said Dr Patel. This is a gate where two qubits are swapped depending on the value of the third. The research team used the quantum entanglement of photons -- particles of light -- to implement the controlled-SWAP operation directly.

The quantum Fredkin gate can also be used to perform a direct comparison of two sets of qubits quantum bits to determine whether they are the same or not. This is not only useful in computing but is an essential feature of some secure quantum communication protocols where the goal is to verify that two strings, or digital signatures, are the same," said Professor Tim Ralph from the University of Queensland.

Note: Content may be edited for style and length. Journal Reference: R. Patel, J. Ho, F. Ferreyrol, T. Ralph, G. A quantum Fredkin gate. Science Advances, ; 2 3 : e DOI:

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Unlocking the gates to quantum computing

Description of the electrostatic method and a derivation of Vc. The American Chemical Society holds a copyright ownership interest in any copyrightable Supporting Information. Files available from the ACS website may be downloaded for personal use only. Users are not otherwise permitted to reproduce, republish, redistribute, or sell any Supporting Information from the ACS website, either in whole or in part, in either machine-readable form or any other form without permission from the American Chemical Society.

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A quantum Fredkin gate

Erasing the which-path information. Section S2. Generation of three-photon GHZ states. HOM dip measurements. Abstract Minimizing the resources required to build logic gates into useful processing circuits is key to realizing quantum computers. Although the salient features of a quantum computer have been shown in proof-of-principle experiments, difficulties in scaling quantum systems have made more complex operations intractable.

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