Strong dispersive coupling between a mechanical resonator and a fluxonium superconducting qubit

• URL: http://arxiv.org/abs/2304.13589v1
• Date: Wed, 26 Apr 2023 14:33:39 GMT
• Title: Strong dispersive coupling between a mechanical resonator and a fluxonium superconducting qubit
• Authors: Nathan R. A. Lee, Yudan Guo, Agnetta Y. Cleland, E. Alex Wollack, Rachel G. Gruenke, Takuma Makihara, Zhaoyou Wang, Taha Rajabzadeh, Wentao Jiang, Felix M. Mayor, Patricio Arrangoiz-Arriola, Christopher J. Sarabalis, Amir H. Safavi-Naeini
• Abstract summary: We extend the reach of circuit quantum acousto-dynamics experiments into a new range of frequencies. We have engineered a qubit-phonon coupling rate of $gapprox2pitimes14textMHz$, and achieved a dispersive interaction that exceeds the decoherence rates of both systems. Our results demonstrate the potential for fluxonium-based hybrid quantum systems, and a path for developing new quantum sensing and information processing schemes with phonons at frequencies below 700 MHz.
• Score: 1.3828553628764202
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate strong dispersive coupling between a fluxonium superconducting qubit and a 690 megahertz mechanical oscillator, extending the reach of circuit quantum acousto-dynamics (cQAD) experiments into a new range of frequencies. We have engineered a qubit-phonon coupling rate of $g\approx2\pi\times14~\text{MHz}$, and achieved a dispersive interaction that exceeds the decoherence rates of both systems while the qubit and mechanics are highly nonresonant ($\Delta/g\gtrsim10$). Leveraging this strong coupling, we perform phonon number-resolved measurements of the mechanical resonator and investigate its dissipation and dephasing properties. Our results demonstrate the potential for fluxonium-based hybrid quantum systems, and a path for developing new quantum sensing and information processing schemes with phonons at frequencies below 700 MHz to significantly expand the toolbox of cQAD.

Related papers

• Ultra-dispersive resonator readout of a quantum-dot qubit using longitudinal coupling [0.20742830443146304]
  We perform readout of a quantum-dot hybrid qubit coupled to a superconducting resonator through a parametric, longitudinal interaction mechanism. Our experiments are performed with the qubit and resonator frequencies detuned by $sim$10 GHz, demonstrating that longitudinal coupling can facilitate semiconductor qubit operation in the 'ultra-dispersive' regime of circuit quantum electrodynamics.
  arXiv  Detail & Related papers  (2024-07-11T21:11:12Z)
• Tunable coupling of a quantum phononic resonator to a transmon qubit with flip-chip architecture [27.214977464945797]
  A hybrid system with tunable coupling between phonons and qubits shows great potential for advancing quantum information processing. In this work, we demonstrate strong and tunable coupling between a surface acoustic wave (SAW) resonator and a transmon qubit based on galvanic-contact flip-chip technique.
  arXiv  Detail & Related papers  (2024-04-29T09:28:45Z)
• Enhanced optomechanical interaction in the unbalanced interferometer [40.96261204117952]
  Quantum optomechanical systems enable the study of fundamental questions on quantum nature of massive objects. Here we propose a modification of the Michelson-Sagnac interferometer, which allows to boost the optomechanical coupling strength.
  arXiv  Detail & Related papers  (2023-05-11T14:24:34Z)
• Quantum emulation of the transient dynamics in the multistate Landau-Zener model [50.591267188664666]
  We study the transient dynamics in the multistate Landau-Zener model as a function of the Landau-Zener velocity. Our experiments pave the way for more complex simulations with qubits coupled to an engineered bosonic mode spectrum.
  arXiv  Detail & Related papers  (2022-11-26T15:04:11Z)
• An integrated microwave-to-optics interface for scalable quantum computing [47.187609203210705]
  We present a new design for an integrated transducer based on a superconducting resonator coupled to a silicon photonic cavity. We experimentally demonstrate its unique performance and potential for simultaneously realizing all of the above conditions. Our device couples directly to a 50-Ohm transmission line and can easily be scaled to a large number of transducers on a single chip.
  arXiv  Detail & Related papers  (2022-10-27T18:05:01Z)
• Slowing down light in a qubit metamaterial [98.00295925462214]
  superconducting circuits in the microwave domain still lack such devices. We demonstrate slowing down electromagnetic waves in a superconducting metamaterial composed of eight qubits coupled to a common waveguide. Our findings demonstrate high flexibility of superconducting circuits to realize custom band structures.
  arXiv  Detail & Related papers  (2022-02-14T20:55:10Z)
• Transmission spectra of the driven, dissipative Rabi model in the USC regime [0.0]
  We present theoretical transmission spectra of a strongly driven, damped, flux qubit coupled to a dissipative resonator. Such a qubit-oscillator system constitutes the building block of superconducting circuit QED platforms.
  arXiv  Detail & Related papers  (2021-04-29T16:58:52Z)
• Phonon-number resolution of voltage-biased mechanical oscillators with weakly-anharmonic superconducting circuits [0.0]
  We study the electrostatic coupling of motion to a weakly anharmonic circuit, namely the transmon qubit. To remedy this issue, we explore the requirements to reach phonon-number resolution.
  arXiv  Detail & Related papers  (2021-03-08T15:32:20Z)
• Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime [125.99533416395765]
  We show that the simplest set-up of two qubits, harmonically trapped over an optical waveguide, enables the ultrastrong coupling regime of the quantum optomechanical interaction. The combination of the inherent open nature of the system and the strong optomechanical coupling leads to emerging parity-time (PT) symmetry. The $mathcalPT$ phase transition drives long-living subradiant states, observable in the state-of-the-art waveguide QED setups.
  arXiv  Detail & Related papers  (2020-07-04T11:02:20Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)
• Large flux-mediated coupling in hybrid electromechanical system with a transmon qubit [0.0]
  Control over the quantum states of a massive oscillator is important for several technological applications. We present a hybrid device, consisting of a superconducting transmon qubit and a mechanical resonator coupled using the magnetic-flux. With improvements in qubit coherence, this system offers a novel platform to realize rich interactions and could potentially provide full control over the quantum motional states.
  arXiv  Detail & Related papers  (2020-01-16T08:59:14Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.