简体中文

Researchers develop new techniques for controlling individual qubits using lasers

856
2023-09-12 15:01:26
查看翻译

Researchers at the University of Waterloo's Institute for Quantum Computing (IQC) have developed a new technique that uses lasers to control individual qubits made from the chemical element barium. The breakthrough is a key step toward realizing the capabilities of quantum computers.

The new technique uses thin glass waveguides to segment and focus laser beams with unprecedented precision. Each focused laser beam can be adjusted independently, making it possible to reliably manipulate individual qubits. Previous methods could not achieve this level of control.

One of the main advantages of the new technology is its ability to limit crosstalk, which is interference between adjacent ions. The researchers were able to reduce the crosstalk to just 0.01 percent of its relative strength, making it one of the best in the quantum world. This means that the laser beam can target specific ions without affecting its neighbors.

The researchers focused on the barium ion, which has the right energy state to be used as the zero and one energy levels of qubits. Unlike other atom types, barium ions can be manipulated using visible green light rather than higher energy ultraviolet light. This allows researchers to take advantage of commercially available optical techniques that were previously unavailable at ultraviolet wavelengths.

The team developed a waveguide circuit that divides a single laser beam into 16 different light channels. Each channel is then sent to its own fibre-based modulator, which individually controls the intensity, frequency and phase of each laser beam. A series of optical lenses are then used to focus the laser beam to a narrow gap.

The researchers monitored each laser beam with precise camera sensors, confirming their precise focusing and control. This highly accurate and flexible control system sets a new standard in academia and industry.

The ultimate goal of this research is to build barium ion quantum processors, because ions are the same natural qubits that do not need to be manufactured. The focus now is on finding ways to effectively control these ions.

Source: Laser Network

相关推荐
  • Advancing Astronomy: Using Laser Guided Star Adaptive Optics to Obtain clearer celestial views

    Adaptive optics is defined as an advanced optical system used to correct the transmission medium between the subject and the image, providing users with clearer images. Adaptive optics helps to use a complex combination of deformable mirrors to correct images in real-time through distortion in the Earth's atmosphere. These images are of greater importance in many vertical industries such as health...

    2024-02-22
    查看翻译
  • Veeco Instruments wins IBM big order

    On August 14th local time, Veeco Instruments, a well-known American laser annealing manufacturer, announced an important cooperation with technology giant IBM. It is reported that IBM has selected Veeco Instruments' WaferStorm wet processing system as support for its advanced packaging applications, and the two parties have signed a joint development agreement to explore the potential of utilizi...

    2024-08-23
    查看翻译
  • Continuation of the Term of President and CEO of Jena Germany

    Recently, the supervisory board of Jenoptik, a leading German laser technology company, announced an important decision: to extend and confirm the term of Dr. Stefan Traeger as Chairman of the Executive Board, with a new term of three years starting from July 1, 2025, and the contract validity period correspondingly extended to June 30, 2028. Dr. Stefan Traeger has been serving as the President ...

    2024-09-06
    查看翻译
  • Emerging laser technologies for precise manufacturing of multifunctional nanomaterials and nanostructures

    The use of photons to directly or indirectly drive chemical reactions has fundamentally changed the field of nanomaterial synthesis, leading to the emergence of new sustainable laser chemistry methods for manufacturing micro - and nanostructures. The incident laser radiation triggers complex interactions between chemical and physical processes at the interface between solid surfaces and liquid or ...

    2024-08-05
    查看翻译
  • Halo Industries raises 580 million yuan to achieve significant breakthrough in SiC laser processing field

    Recently, Halo Industries, an innovative technology company based in California, announced that it has successfully raised $80 million in Series B venture capital, marking a significant breakthrough in its use of laser technology to revolutionize the production of silicon carbide (SiC) semiconductor wafer substrates.This financing is led by the US Innovation Technology Fund (USIT) and involves hea...

    2024-07-18
    查看翻译