Fast dynamical decoupling of the Molmer-Sorensen entangling gate
| Autor: | Amit Rotem, Roee Ozeri, Itsik Cohen, Nitzan Akerman, Alex Retzker, Yotam Shapira, Ravid Shaniv, Tom Manovitz |
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| Rok vydání: | 2017 |
| Předmět: |
Coupling
Physics Quantum Physics Dynamical decoupling Atomic Physics (physics.atom-ph) General Physics and Astronomy FOS: Physical sciences Quantum entanglement 01 natural sciences Noise (electronics) 010305 fluids & plasmas Physics - Atomic Physics Quality (physics) Robustness (computer science) Quantum mechanics 0103 physical sciences 010306 general physics Quantum Physics (quant-ph) Quantum Boson |
| DOI: | 10.48550/arxiv.1706.03468 |
| Popis: | Engineering entanglement between quantum systems often involves coupling through a bosonic mediator, which should be disentangled from the systems at the operation's end. The quality of such an operation is generally limited by environmental and control noise. One of the prime techniques for suppressing noise is by dynamical decoupling, where one actively applies pulses at a rate that is faster than the typical time scale of the noise. However, for boson-mediated gates, current dynamical decoupling schemes require executing the pulses only when the boson and the quantum systems are disentangled. This restriction implies an increase of the gate time by a factor of $\sqrt{N}$, with $N$ being the number of pulses applied. Here we propose and realize a method that enables dynamical decoupling in a boson mediated system where the pulses can be applied while spin-boson entanglement persists, resulting in an increase in time that is at most a factor of $\frac{\pi}{2}$, independently of the number of pulses applied. We experimentally demonstrate the robustness of our fast dynamically decoupled entangling gate to $\sigma_z$ noise with ions in a Paul trap. |
| Databáze: | OpenAIRE |
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