7/ Proof of the quantum advantage: it's not just theoretical. PQC systems have manifested their potential in real experiments, showing a quantum computational advantage in several cases (Jiuzhang, Borealis).
6/ Diverse computational schemes: PQC proves versatile in performing various QC techniques, ranging from universal schemes like MBQC to non-universal ones such as boson sampling. Moreover, PQC is adaptable to classical photonic (aka optical) computing.
5/ Scalability & Compatibility: PQC systems are compatible with many existing photonic technologies, and promise great scalability due to the maturity of the photonics industry and the progress in photonic integration.
4/ Quantum communication: Photons are required anyway for quantum communication over optical networks, and distributed or modular computing approaches using optical links.
3/ Precision in manipulation: With the ability to be manipulated with high precision, photons have enabled high-fidelity single-qubit operations for decades. arxiv.org/abs/quant-ph...
We present the theoretical basis for and experimental verification of arbitrary single-qubit state generation, using the polarization of photons generated via spontaneous parametric...
2.5/ (Notice: We will most likely have to cool the photodetectors that are ultimately used in PQC systems. And when in the end the whole PQC system is integrated on a single chip, the whole chip therefore has to be cooled, but that's another story.)
2/ Operating temperature: A significant logistical advantage is that photons retain their quantum properties at room temperature. As a result, PQC systems don't need to be cooled to cryogenic temperatures (like many other QC architectures), which greatly reduces the implementation effort.
1/ Decoherence: Photons are nearly decoherence-free due to their weak interaction with their environment. This property allows many computations to be performed within a single qubit lifetime, increasing the robustness of PQC.
Among the various quantum computing architectures, photonic quantum computing (PQC) is emerging as a promising candidate. This is, as photonic quantum computing systems offer plenty of benefits. A thread. 🧵