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Schrödinger's cat is now fat

Schrödinger's dead-and-alive cat was a thought experiment applying the physics of electrons and atoms to our macroscopic world. New experiments with superconductors narrow the gap between theoretical ideas and reality.

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Figure 1: The state of Schrödinger's cat.


  1. Schrödinger, E. Naturwissenschaften 23, 807–812, 823–828, 844–849 ( 1935).

    ADS  Article  Google Scholar 

  2. Friedman, J. R., Patel, V., Chen, W., Tolpygo, S. K. & Lukens, J. E. Nature 406, 43– 46 (2000).

    ADS  CAS  Article  Google Scholar 

  3. Caldeira, A. O. & Leggett, A. J. Ann. Phys. 149, 374–456 ( 1983).

    ADS  Article  Google Scholar 

  4. Schmid, A. Phys. Rev. Lett. 51, 1506–1509 (1983).

    ADS  Article  Google Scholar 

  5. Chakravarty, S. & Leggett, A. J. Phys. Rev. Lett. 52, 5–8 ( 1984).

    ADS  Article  Google Scholar 

  6. Nakamura, Y., Pashkin, Yu. A. & Tsai, J. S. Nature 398, 786– 788 (1999).

    ADS  CAS  Article  Google Scholar 

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Correspondence to Gianni Blatter.

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Blatter, G. Schrödinger's cat is now fat. Nature 406, 25–26 (2000).

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