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Caltech Optical Imaging Laboratory
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Quantum

We study quantum entanglement, quantum imaging, and atomic physics. Entangled photons exhibit nonclassical characteristics and can be used for quantum imaging. Unlike classical optical imaging, quantum imaging has achieved sub-shot noise and super-resolution beyond the diffraction limit through coincidence detection. As photons originate from atoms/molecules, we also investigate atomic physics at the interface between classical and quantum physics. For example, we surprisedly found that the Bloch equation conventionally thought as classical only yields the von Neumann equation and the Schrödinger equation for spin-half particles. We also developed a theory that models the multi-stage Stern-Gerlach experiment suggested by Heisenberg and Einstein more accurately than the available theory.

Selected Publications

  1. [He, Z.; Titimbo, K.; Garrett, D. C.]; Kahraman, S. S.; Wang, L. V.; "Numerical modeling of the multi-stage Stern–Gerlach experiment by Frisch and Segrè using co-quantum dynamics via the Schrödinger equation," Journal of Physics B: Atomic, Molecular and Optical Physics 56(20) 205005 (2023) [PDF]
  2. [Titimbo, K.; Garrett, D. C.; Kahraman, S. S.; He, Z.]; Wang, L. V.; "Numerical modeling of the multi-stage Stern–Gerlach experiment by Frisch and Segrè using co-quantum dynamics via the Bloch equation," Journal of Physics B: Atomic, Molecular and Optical Physics 56(20) 205004 (2023) [PDF]
  3. Wang, L. V.; "Multi-stage Stern–Gerlach experiment modeled," Journal of Physics B: Atomic, Molecular and Optical Physics 56(10) (2023) [PDF]
  4. [He, Z.; Zhang, Y.; Tong, X.]; Li, L.; Wang, L, V.; "Quantum microscopy of cells at the Heisenberg limit," Nature Communications 14(1) 2441 (2023) [PDF]
  5. [Tong, X.; He, Z.; Zhang, Y.]; Solomon, S.; Lin, L.; Song, Q.; Wang, L. V.; "Experimental full-domain mapping of quantum correlation in Clauser-Horne-Shimony-Holt scenarios," Physical Review Applied 19(3) 034049 (2023) [PDF]
  6. [Zhang,Y.; He, Z.; Tong, X.]; Garrett, D.; Cao, R.; Wang, L.V.; "Quantum imaging of biological organisms through spatial and polarization entanglement," ArXiv preprint arXiv:2303.05643 (2023) [PDF]
  7. [Kahraman, S. S.; Titimbo, K.]; He, Z.; Shen, J.-T.; Wang, L, V.; "Quantum mechanical modeling of the multi-stage Stern-Gerlach experiment by Frisch and Segre using the von Neumann equation," ArXiv preprint arXiv:2210.11553 (2022) [PDF]
  8. Wang, L. V.; "Multi-stage Stern-Gerlach experiment modeled (with additional appendices)," ArXiv preprint arXiv:2208.06471 (2022) [PDF]
  9. Wang, L. V.; "Derivation from Bloch equation to von Neumann equation to Schrödinger–Pauli equation," Foundations of Physics 52(3) 61 (2022) [PDF]