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<\/p>\nA programmable chip is used to course of the quantum info transmitted by single photons. Every pink dot represents a single photon, and the hyperlinks between them signify quantum entanglement \u2013 which is the way in which quantum info is shared between totally different photons. Credit score: Stefano Paesani<\/p>\n
<\/div>\n Scientists on the Niels Bohr Institute<\/a>, in cooperation with the University of M\u00fcnster<\/a> and Ruhr-Universit\u00e4t Bochum<\/a>, developed new know-how able to processing the large quantities of data quantum techniques generate. They\u2019ve efficiently linked deterministic single-photon<\/span> light sources, which generate quantum bits at incredibly high speeds and rates, to specially created integrated photonic circuits. These circuits can process quantum information effectively and rapidly without degrading the susceptible quantum states.<\/p>\n This breakthrough paves the way for the creation of photonic quantum devices that may, for instance, analyze and model complex quantum systems \u2013 such as the vibrational dynamics of biological molecules. The study has been published in Science Advances<\/span><\/em>.<\/p>\n <\/span><\/p>\n Professor Peter Lodahl and the research group Quantum Photonics at the Niels Bohr Institute, University of Copenhagen have worked in this field for nearly twenty years. In short, it is all about the use of single photons, the smallest parts of light, used to code quantum information.<\/p>\n This is a rapidly developing field, demonstrating a single-photon encrypted communication link in the autumn of 2022 and a recent record investment in the spin-out business Sparrow Quantum.<\/p>\n At the core of it all are the photon sources developed and refined by the group over many years. Presently with unparalleled control, precision, and quality, opening the doors to new research and development in quantum technology.<\/p>\n <\/span><\/p>\n As soon as the word \u201cquantum\u201d is on the table it is often followed by the word \u201ccomputer\u201d \u2013 the idea of an extremely strong platform for calculations, with the capacity of dealing with complex problems.<\/p>\n Peter Lodahl says that the work done in connection with this result points in the direction of what they call a \u201cquantum simulator.\u201d<\/p>\n A quantum simulator is a special-purpose computer that simulates quantum systems by processing quantum information (quantum bits) that classical computers have a hard time dealing with.<\/span><\/p>\n \u201cThe processing of quantum information demands an exponentially increasing capacity on a classical computer when increasing the number of quantum bits. This means that even rather simple quantum mechanical problems cannot be solved on classical computers\u201d, says Stefano Paesani, one of the leading researchers behind the result.<\/p>\n <\/p>\n What does \u201cprocessing\u201d quantum information mean?\u00a0 This is where a crucial interdisciplinary element comes in.<\/p>\n Within the framework of the Novo Nordisk Foundation Project, \u201cSolid-State Quantum Simulators for Biochemistry (SolidQ),\u201d photons, interacting in a photonic circuit, can be used to describe the characteristics of biochemical processes.<\/p>\n You can use one system (photons) to learn about the other system (the biomolecule) because the photonic quantum simulator can process the complex quantum information that describes it. One of the challenges consists in understanding the connection between the two complex quantum systems.<\/p>\n \u201cWe can learn about one system by studying the other \u2013 i.e. you can \u201cmap\u201d one system to another. The initial insight into a complex system is crucial, however.<\/p>\nThe long haul now shows its value<\/h4>\n
Quantum simulator \u2013 what\u2019s all that about?<\/h4>\n
What is the purpose of a quantum simulator?<\/h4>\n
A quantum simulator relies on the congruence between different quantum systems<\/h4>\n