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Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength
Optics Express
|May 9, 2023
Summary
Researchers generated non-Gaussian quantum states using ultrashort optical wave packets in the telecommunication band. This breakthrough is vital for high-speed quantum computation and developing fault-tolerant quantum computers.
Area of Science:
- Quantum Information Processing
- Quantum Optics
Background:
- Non-Gaussian states with negative Wigner function values are essential for fault-tolerant quantum computing.
- Previous experimental generations lacked ultrashort optical wave packets in the telecommunication band, hindering high-speed applications.
Purpose of the Study:
- To generate non-Gaussian states using ultrashort optical wave packets in the telecommunication wavelength band.
- To enable high-speed quantum computation by utilizing mature optical communication technology.
Main Methods:
- Generation of non-Gaussian states on 8-ps wave packets at 1545.32 nm.
- Utilized photon subtraction up to three photons.
- Employed a low-loss waveguide optical parametric amplifier and a superconducting transition edge sensor.
- Used a phase-locked pulsed homodyne measurement system.
Main Results:
- Observed negative Wigner function values without loss correction for up to three-photon subtraction.
- Successfully generated non-Gaussian states on ultrashort wave packets in the telecommunication band.
- Demonstrated the feasibility of high-speed quantum state generation.
Conclusions:
- The study presents a key technology for high-speed optical quantum computation.
- Results pave the way for generating more complex non-Gaussian states.
- Advances the development of fault-tolerant universal quantum computers.
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