Quantum Computing

Quantum computers have the potential to address challenges of much greater complexity than what today's computers can solve, helping achieve advancements in science, technology, medicine, and more. This all begins with creating and initializing qubits, or quantum bits. Yokogawa offers a highly stable, low noise current source to create the magnetic field required in quantum computing to initialize these extremely sensitive qubits.

Quantum qubits are built up from Josephson junctions which, when integrated in a closed loop, are highly sensitive to small changes in the external magnetic field passing through the loop​. The magnetic field must be finely tuned so the quantized energy levels can be smoothly transformed, a crucial part of initializing a quantum computer.

GS200 - Yokogawa's Quantum Computing Solution

Current is applied through a wire from a DC current source to produce the magnetic field to initialize the qubits. Yokogawa's GS200 is a low voltage/current DC source with high accuracy, high stability, and high resolution, making for an ideal DC current source. With its excellent traceability, stability, and 5 1/2-digit resolution, the GS200 generates extremely low-noise DC voltage and current signals that are required for many applications. Additionally, the optional monitoring feature turns the GS200 into a voltage and current measuring instrument.

Learn more about the GS200.

Key Features

Low Noise

  • 100 uVp-p (10 V range, DC to 10 kHz)​
  • 3 uAp-p (100 mA range, DC to 10 kHz)
     


Noise waveform example at 0 V output in 10 V output range (observed using a 1000 times amplifier with a 10 kHz band-limiting filter)

High Stability

  • +/- 0.001% of setting + 20 uV (at 10 V range for one day)​
  • +/- 0.004% of setting + 3 uA (at 100 mA range for one day)​
  • The stability is specified out to 90 days


Example of 1 hour stability in output 200 mA range (as reference data)

 

Overview:

To realize working Josephson junction-based qubits requires a current source with low noise and high accuracy, stability and resolution.  Click below to learn how the Yokogawa GS200 Precision DC Voltage / Current Source fulfils these requirements for the experimental quantum computing setups of Princeton University’s Dr Andras Gyenis.

Overview:

Source measure units combine the best features of power supplies and digital multimeters and have numerous applications ranging from battery simulators, semiconductor characterization, and efficiency testing on power electronics. 

Overview:

A new type of computer based on the theory of quantum mechanics, a quantum computer, is currently in development by researchers around the globe. The theory of quantum mechanics describes nature at the atomic and subatomic level. Quantum technology has the potential to build powerful tools that process information using the properties of atoms, photons, and electrons. These quantum computers could also address challenges of much greater complexity than what today's computers can solve, and help further advancements in science, technology, medicine, and more.

With countries spending billions of dollars, the race for who can produce the first practical, commercialized quantum computer is on. There are currently several approaches to build this sort of computer, and this all begins with creating and initializing quantum bits, also known as qubits.

Overview:

Laval University is a research institution world renowned for optics and photonics technology research and training, and are the founders of The Center for Optics, Photonics, and Lasers (COPL).

The university's researchers needed a faster and more efficient and practical solution to measure the spectral performance of lasers and optics beyond traditional telecom wavelengths. To achieve this, they contacted Yokogawa Test&Measurement and collaborated to develop a breakthrough grating-based optical spectrum analyzer that could cover MWIR wavelengths up to 5.5 um. Click to learn how productivity in the research lab dramatically increased for precise characterization of laser sources, and active/passive optical components in the fields of communications, medical diagnosis, advanced optical sensing, and environmental and atmospheric sensing.

Product Overviews

    Overview:

    Introducing the new Yokogawa Test&Measurement AQ6380 Optical Spectrum Analyzer. This new OSA includes many sought-after features including:

    • An unprecedented 5 pm wavelength resolution
    • ±5 pm wavelength accuracy
    • 1200 nm to 1650 nm wavelength range
    • 65 dB wide close-in dynamic range
    • 80 dB stray light suppression
    • Automated wavelength calibration
    • Gas purging
    • DUT-oriented interface and test apps
    • Backward-compatible remote interface
    • 10.4in intuitive touchscreen
    • Up to 20x faster measurement
    • Remote operation capabilities

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