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Jian-Wei Pan

5 articles · 30 co-authors · latest: 2026-05-27

Photonic Quantum Computer Sets a Speed Record

The new photonic computer Jiuzhang 4.0 pushes photons through a network of microchannels and uses photometry—precise counting of light flashes—to record the final pattern. This pattern is beyond any ordinary computer: it would require sifting through more possibilities than atoms in the universe. Th
arXiv:2508.09092 · 2025-08-12

Tiny chip tames quantum entanglement

The device generates pairs of entangled photons at a record rate—45 billion per second—consuming just milliwatts of power. The purity of the quantum connection exceeds 96%. Its tiny size and efficiency bring quantum internet, secure satellite links, and ultra-precise sensors closer to reality.
arXiv:2508.14566 · 2025-08-20

Surfer Photons: How a Wave Guides a Particle

In pilot-wave theory, particles follow clear trajectories, like surfers on waves. By reconstructing photon trajectories in the double-slit experiment, physicists saw something strange: in the dark fringes, the particle's mass behaved like a tachyon's — becoming imaginary. This is the first direct ev
arXiv:2509.11609 · 2025-09-15

Quantum Internet: From Theory to Reality

For the first time, single atoms were reliably linked over long optical fiber, and a secret code was extracted from their 'conversation'. Any eavesdropping attempt instantly destroys the pair — not a trick, but a property of the quantum world. This protection scheme turns any interception into a bla
arXiv:2602.09596 · 2026-02-10

The Whisper Faded: A Quantum Trick Bypasses a Fundamental Limit

In the famous thought experiment between Einstein and Bohr, the atomic slit always trembles due to quantum noise. This noise, like an unceasing whisper, smears the wave pattern. Now, physicists have learned to squeeze this whisper: to hush the part that gives away the particle's path. Fringe contras
arXiv:2605.28038 · 2026-05-27