Robust Oscillator-Mediated Phase Gates Driven by Low-Intensity Pulses
- URL: http://arxiv.org/abs/2209.14817v2
- Date: Tue, 30 May 2023 09:28:01 GMT
- Title: Robust Oscillator-Mediated Phase Gates Driven by Low-Intensity Pulses
- Authors: I. Arrazola and J. Casanova
- Abstract summary: We present a method that leads to faster-than-dispersive entanglement gates with low-intensity pulses.
Our method is applicable to any quantum platform that has qubits interacting with bosonic mediators via longitudinal coupling.
We show that entanglement gates with infidelities of $10-3$ or $10-4$ are possible with current or near-future experimental setups.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Robust qubit-qubit interactions mediated by bosonic modes are central to many
quantum technologies. Existing proposals combining fast oscillator-mediated
gates with dynamical decoupling require strong pulses or fast control over the
qubit-boson coupling. Here, we present a method based on dynamical decoupling
techniques that leads to faster-than-dispersive entanglement gates with
low-intensity pulses. Our method is general, i.e., it is applicable to any
quantum platform that has qubits interacting with bosonic mediators via
longitudinal coupling. Moreover, the protocol provides robustness to
fluctuations in qubit frequencies and control fields, while also being
resistant to common errors such as frequency shifts and heating in the mediator
as well as crosstalk effects. We illustrate our method with an implementation
for trapped ions coupled via magnetic field gradients. With detailed numerical
simulations, we show that entanglement gates with infidelities of $10^{-3}$ or
$10^{-4}$ are possible with current or near-future experimental setups,
respectively.
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