Journal article
Transforming pure and mixed states using an NMR quantum homogeniser
- Abstract:
- The universal quantum homogeniser can transform a qubit from any state to any other state with arbitrary accuracy, using only unitary transformations to perform this task. Here we present an implementation of a finite quantum homogeniser using nuclear magnetic resonance (NMR), with a four-qubit system. We compare the homogenisation of a mixed state to a pure state, and the reverse process. After accounting for the effects of decoherence in the system, we find the experimental results to be consistent with the theoretical symmetry in how the qubit states evolve in the two cases. We analyse the implications of this symmetry by interpreting the homogeniser as a physical implementation of pure state preparation and information scrambling.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, 592.5KB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevA.103.022414
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review A More from this journal
- Volume:
- 103
- Article number:
- 022414
- Publication date:
- 2021-02-11
- Acceptance date:
- 2021-01-26
- DOI:
- EISSN:
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1094-1622
- ISSN:
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1050-2947
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2021
- Rights statement:
- © 2021 American Physical Society
- Notes:
- This is the accepted manuscript version of the article. The final version is available from American Physical Society at: https://doi.org/10.1103/PhysRevA.103.022414
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