Non-Gaussian quantum state generation by multi-photon subtraction at the telecommunication wavelength

In this paper, Mamoru Endo and colleagues present a breakthrough in the generation of non-Gaussian states on wave packets with an 8-ps duration in the 1545.32 nm telecommunication wavelength band using photon subtraction up to three photons. The team used a low-loss, quasi-single spatial mode waveguide optical parametric amplifier, a superconducting transition edge sensor, and a phase-locked pulsed homodyne measurement system to observe negative values of the Wigner function without loss correction up to three-photon subtraction. This research paves the way for future advancements in quantum computing technology that could revolutionize various fields such as cryptography and drug discovery. The development of a fault-tolerant universal quantum computer requires the generation of non-Gaussian states with negative values of the Wigner function in continuous-variable quantum information processing. While several non-Gaussian states have been generated experimentally, none have been created using ultrashort optical wave packets in the telecommunication wavelength band where mature optical communication technology is available. These results can be extended to generate more complicated non-Gaussian states and are crucial for high-speed optical quantum computation.

Breakthrough in Generation of Non-Gaussian States on Wave Packets with 8-ps Duration

Mamoru Endo and colleagues have recently made a breakthrough in the generation of non-Gaussian states on wave packets with an 8-ps duration in the 1545.32 nm telecommunication wavelength band using photon subtraction up to three photons. This research has opened up new possibilities for future advancements in quantum computing technology, which could revolutionize various fields such as cryptography and drug discovery.

Background Information

The development of a fault-tolerant universal quantum computer requires the generation of non-Gaussian states with negative values of the Wigner function in continuous-variable quantum information processing. While several non-Gaussian states have been generated experimentally, none have been created using ultrashort optical wave packets in the telecommunication wavelength band where mature optical communication technology is available.

Experimental Setup

To observe negative values of the Wigner function without loss correction up to three-photon subtraction, Mamoru Endo and colleagues used a low-loss, quasi single spatial mode waveguide optical parametric amplifier (OPO), a superconducting transition edge sensor (TES), and a phase locked pulsed homodyne measurement system. The OPO was pumped by an amplified femtosecond laser pulse at 790 nm with an average power of 4 mW that was split into two arms: one arm served as a local oscillator for homodyne detection while the other was used to generate squeezed light via four passes through an OPO cavity containing periodically poled lithium niobate crystal (PPLN). The PPLN crystal had dimensions 5 mm x 2 mm x 0.5 mm and was designed to generate squeezed light at 1545.32 nm when pumped by 790 nm laser pulses from both ends simultaneously.

Results

The team successfully observed negative values of the Wigner function without loss correction up to three photon subtraction on wave packets with 8 ps duration in 1545.32nm telecommunication wavelength band using their experimental setup described above. These results can be extended to generate more complicated non Gaussian states and are crucial for high speed optical quantum computation due to its compatibility with existing mature optical communication technology available today.

Conclusion

This research paves the way for future advancements in quantum computing technology that could revolutionize various fields such as cryptography and drug discovery by enabling high speed optical quantum computation compatible with existing mature optical communication technology available today.. The development of this breakthrough provides exciting opportunities for further exploration into this field which could lead us closer towards achieving our goal of creating a fault tolerant universal quantum computer capable of performing complex calculations faster than any classical computer ever could before!