Protected Fluxonium Control with Sub-harmonic Parametric Driving

  1. Johannes Schirk,
  2. Florian Wallner,
  3. Longxiang Huang,
  4. Ivan Tsitsilin,
  5. Niklas Bruckmoser,
  6. Leon Koch,
  7. David Bunch,
  8. Niklas J. Glaser,
  9. Gerhard B. P. Huber,
  10. Martin Knudsen,
  11. Gleb Krylov,
  12. Achim Marx,
  13. Frederik Pfeiffer,
  14. Lea Richard,
  15. Federico A. Roy,
  16. João H. Romeiro,
  17. Malay Singh,
  18. Lasse Södergren,
  19. Etienne Dionis,
  20. Dominique Sugny,
  21. Max Werninghaus,
  22. Klaus Liegener,
  23. Christian M. F. Schneider,
  24. and Stefan Filipp
Protecting qubits from environmental noise while maintaining strong coupling for fast high-fidelity control is a central challenge for quantum information processing. Here, we demonstrate

Parity-dependent state transfer for direct entanglement generation

  1. Federico A. Roy,
  2. João H. Romeiro,
  3. Leon Koch,
  4. Ivan Tsitsilin,
  5. Johannes Schirk,
  6. Niklas J. Glaser,
  7. Niklas Bruckmoser,
  8. Malay Singh,
  9. Franz X. Haslbeck,
  10. Gerhard B. P. Huber,
  11. Gleb Krylov,
  12. Achim Marx,
  13. Frederik Pfeiffer,
  14. Christian M. F. Schneider,
  15. Christian Schweizer,
  16. Florian Wallner,
  17. David Bunch,
  18. Lea Richard,
  19. Lasse Södergren,
  20. Klaus Liegener,
  21. Max Werninghaus,
  22. and Stefan Filipp
As quantum information technologies advance they face challenges in scaling and connectivity. In particular, two necessities remain independent of the technological implementation:

Efficient decoupling of a non-linear qubit mode from its environment

  1. Frederik Pfeiffer,
  2. Max Werninghaus,
  3. Christian Schweizer,
  4. Niklas Bruckmoser,
  5. Leon Koch,
  6. Niklas J. Glaser,
  7. Gerhard Huber,
  8. David Bunch,
  9. Franz X. Haslbeck,
  10. M. Knudsen,
  11. Gleb Krylov,
  12. Klaus Liegener,
  13. Achim Marx,
  14. Lea Richard,
  15. João H. Romeiro,
  16. Federico Roy,
  17. Johannes Schirk,
  18. Christian Schneider,
  19. Malay Singh,
  20. Lasse Södergren,
  21. Ivan Tsitsilin,
  22. Florian Wallner,
  23. Carlos A. Riofrío,
  24. and Stefan Filipp
To control and measure the state of a quantum system it must necessarily be coupled to external degrees of freedom. This inevitably leads to spontaneous emission via the Purcell effect,