1 / 11

Decoherence Suppression of a Solid State Qubit Using Uncollapsing

This research presents a novel method for suppressing decoherence in solid state qubits through "uncollapsing," an innovative approach that does not require additional resources. By leveraging partial measurements and understanding the effects of null results, our technique effectively shields qubits from Markovian processes, enhancing their stability. The method integrates seamlessly with existing experimental setups and shows resilience against non-ideal operations, offering significant implications for quantum information processing and qubit reliability.

talbot
Download Presentation

Decoherence Suppression of a Solid State Qubit Using Uncollapsing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Decoherence Suppression of a Solid State Qubit Using Uncollapsing Kyle Michael Keane Alexander N. Korotkov University of California, Riverside We thank John Martinis’ Group (UCSB) for their cooperation

  2. Other Proposed Methods • Quantum Error Correcting Codes • Complicated and Resource Hungry • Decoherence-Free Subspace • Complicated and Resource Hungry • Dynamical Decoupling • Does Not Protect Against Markovian Processes

  3. Protocol: 11 T=0 storage period t storage period t Prepared Partial (p) Pi Rotation Pi Rotation Partial (pu ) Our Method: Phase Qubit almost the same as existing experiment!

  4. Phase Qubit: Partial Measurement (PM) Bloch Equations

  5. Phase Qubit: Effect of Null Result Partial Measurement (NRPM) The NRPM reduces the probability that the qubit is in state after the NRPM is complete

  6. Relaxation Probability The probability that a qubit relaxes during a ZTER period is proportional to the probability that it was in state at the beginning of the ZTER period ZTER: Zero Temp Energy Relaxation

  7. Protocol: 11 T=0 storage period t The probability that the qubit relaxes during the storage period is proportional to the probability that it was in state at the beginning of the storage Phase Qubit: Intuitive Understanding The first PM reduces the probability that the qubit is in state after the PM is complete

  8. Storage (t) ResultsIdeal Operations Prep PM(p) p-Pulse p-Pulse Ideal PM(pu) without uncollapsing QPT fidelity (Favs, F) measurement strength p

  9. storage period t Partial (p) Prepared Pi Rotation Partial (pu ) Pi Rotation Non-Ideal Operations Protocol: 11 T=0 storage period t

  10. ResultsNon-Ideal Operations fidelity as in expt. } without uncollapsing probability QPT fidelity (Favs, F) measurement strength p

  11. Conclusions Decoherence Suppression by Uncollapsing: • Requires NO Extra Resources • Protects Against Markovian Processes • Works Even With Non-Ideal Operations • Can Be Experimentally Realized With a Very Simple Extension of a Previous Experiment

More Related