Wave-Shape-Tolerant Photonic Quantum Gates
- URL: http://arxiv.org/abs/2105.13814v3
- Date: Wed, 7 Feb 2024 09:56:39 GMT
- Title: Wave-Shape-Tolerant Photonic Quantum Gates
- Abstract summary: We show that it is possible to construct flying-qubit gates, which are insensitive to waveshapes of the photons and temporal/spectral correlations between them.
This allows using photons with correlations and purity in a very broad range for a scalable computation.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Photons, acting as ``flying qubits'' in propagation geometries such as
waveguides, appear unavoidably in the form of wavepackets (pulses). The actual
shape of the photonic wavepacket, as well as possible temporal/spectral
correlations between the photons, play a critical role in successful scalable
computation. Currently, unentangled indistinguishable photons are considered as
a suitable resource for scalable photonic circuits. Here we show that using so
called coherent photon conversion, it is possible to construct flying-qubit
gates, which are not only insensitive to waveshapes of the photons and
temporal/spectral correlations between them, but which also fully preserve
these waveshapes and correlations upon the processing. This allows using
photons with correlations and purity in a very broad range for a scalable
computation. Moreover, such gates can process entangled photonic wavepackets
even more effectively than unentangled ones.
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