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Phase-modulated decoupling and error suppression in qubit-oscillator systems
- Source :
- Phys. Rev. Lett. 114, 120502 (2015)
- Publication Year :
- 2014
-
Abstract
- We present a scheme designed to suppress the dominant source of infidelity in entangling gates between quantum systems coupled through intermediate bosonic oscillator modes. Such systems are particularly susceptible to residual qubit-oscillator entanglement at the conclusion of a gate period which reduces the fidelity of the target entangling operation. We demonstrate how the exclusive use of discrete phase shifts in the field moderating the qubit-oscillator interaction - easily implemented with modern synthesizers - is sufficient to both ensure multiple oscillator modes are decoupled and to suppress the effects of fluctuations in the driving field. This approach is amenable to a wide variety of technical implementations including geometric phase gates in superconducting qubits and the Molmer-Sorensen gate for trapped ions. We present detailed example protocols tailored to trapped-ion experiments and demonstrate that our approach allows multiqubit gate implementation with a significant reduction in technical complexity relative to previously demonstrated protocols.<br />Comment: Related manuscripts available at http://www.physics.usyd.edu.au/~mbiercuk/Publications.html
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Lett. 114, 120502 (2015)
- Publication Type :
- Report
- Accession number :
- edsarx.1408.2749
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevLett.114.120502