English

New discoveries bring progress in photon calculation

1034
2024-04-27 14:19:49
See translation

International researchers led by Philip Walther from the University of Vienna have made significant breakthroughs in the field of quantum technology, successfully demonstrating quantum interference between multiple single photons using a new resource-saving platform. This work, published in Science Advances, represents a significant advancement in the field of quantum computing and paves the way for more scalable quantum technologies.

The interference between photons is a fundamental phenomenon in quantum optics and the cornerstone of optical quantum computation. It involves using the characteristics of light (such as the wave particle duality of light) to induce interference modes, thereby achieving the encoding and processing of quantum information.

In traditional multiphoton experiments, spatial encoding is commonly used, which involves manipulating photons on different spatial paths to induce interference. These experiments require complex equipment and numerous components, making them resource intensive and difficult to scale.
In contrast, an international team composed of scientists from the University of Vienna, Politecnico di Milano, and the Free University of Brussels chose a time coding based approach. This technique manipulates the temporal rather than spatial statistics of photons.

To achieve this method, they developed an innovative architecture using fiber optic loops at the Christian Doppler Laboratory at the University of Vienna. This design can reuse the same optical components to achieve efficient multiphoton interference with minimal physical resources.

Multiphoton interference network
The first author Lorenzo Carosini explained, "In our experiment, we observed quantum interference between up to eight photons, exceeding the scale of most existing experiments. Thanks to the versatility of our method, the interference mode can be reconfigured and the experimental scale can be expanded without changing the optical device."

The research results indicate that compared with traditional spatial encoding methods, the implemented architecture has significant resource efficiency, paving the way for more easily accessible and scalable quantum technologies.

Source: Physicist Organization Network

Related Recommendations
  • Shanghai Institute of Optics and Fine Mechanics has made progress in composite material based picosecond mirrors

    Recently, the High Power Laser Element Technology and Engineering Department of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has made progress in the research of composite based picosecond mirrors. The related research results were published in Optics and Laser Technology under the title of "Hybrid Material Based Mirror Coatings for Picosed Laser Applications"....

    2024-07-12
    See translation
  • NSF funding for the world leading EP-OPAL laser multi mechanism design in Rochester

    The National Science Foundation (NSF) of the United States has awarded the University of Rochester nearly $18 million for three years to design and prototype key technologies for EP-OPAL, a new facility dedicated to studying the interaction between ultra-high intensity lasers and matter.After the design project is completed, the facility can be built at the Laser Energy Laboratory (LLE). This fund...

    2023-09-26
    See translation
  • SpaceX will sell satellite lasers to competitors that can accelerate space communication

    SpaceX President Gwynne Shotwell stated at a meeting on Tuesday that the company has started selling satellite lasers for fast space communication to other satellite companies.SpaceX's thousands of Starlink satellites in low Earth orbit use inter satellite laser links to transmit data to each other in space at the speed of light, so that the network can provide more extensive Internet coverage wo...

    2024-05-10
    See translation
  • Research has shown that patterns on crystals can double the optical sensitivity of photodetectors

    Scientists from the Institute of Automation and Control Process at the Far East Branch of the Russian Academy of Sciences described the changes on the surface of monocrystalline silicon during laser processing. The author of this study placed the crystal in a methanol solution and applied a laser pulse lasting one thousandth of a second to the sample, with a pulse count ranging from five to fifty ...

    2024-04-01
    See translation
  • Additive Manufacturing Software Market 2025: Analysis, Data, and Forecasting

    In March 2025, Additive Manufacturing Research (AMR) released its latest 3D printing market research report, "AM Software Markets 2025: Analysis, Data, and Forecast," which provides a comprehensive and in-depth analysis of the 3D printing software industry. The latest research findings indicate that global revenue from additive manufacturing (AM) software is expected to grow from $2.44 billion in ...

    03-17
    See translation