Reconfigurable quantum phononic circuits via piezo-acoustomechanical interactions

• URL: http://arxiv.org/abs/2106.05406v2
• Date: Mon, 14 Jun 2021 15:45:10 GMT
• Title: Reconfigurable quantum phononic circuits via piezo-acoustomechanical interactions
• Abstract summary: We show that piezoelectric strain actuation of acoustomechanical interactions can produce large phase velocity changes in an existing quantum phononic platform. We demonstrate a phase shifter waveguide capable of producing +/- pi phase shifts for GHz frequency phonons in 10s of microns with 10s of volts applied. We show that it is possible to perform "read" and "write" operations with over 90% quantum state transfer fidelity for an exponentially decaying pulse.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We show that piezoelectric strain actuation of acoustomechanical interactions can produce large phase velocity changes in an existing quantum phononic platform: aluminum nitride on suspended silicon. Using finite element analysis, we demonstrate a piezo-acoustomechanical phase shifter waveguide capable of producing +/- pi phase shifts for GHz frequency phonons in 10s of microns with 10s of volts applied. Then, using the phase shifter as a building block, we demonstrate several phononic integrated circuit elements useful for quantum information processing. In particular, we show how to construct programmable multi-mode interferometers for linear phononic processing and a dynamically reconfigurable phononic memory that can switch between an ultra-long-lifetime state and a state strongly coupled to its bus waveguide. From the master equation for the full open quantum system of the reconfigurable phononic memory, we show that it is possible to perform "read" and "write" operations with over 90% quantum state transfer fidelity for an exponentially decaying pulse.

Related papers

• A single-phonon directional coupler [0.0]
  In this work, we demonstrate for the first time a 4-port directional coupler for quantum mechanical excitations. By sending a single-phonon Fock state onto one of these phononic splitters, we demonstrate the capability of using the directional coupler directly in the quantum regime.
  arXiv  Detail & Related papers  (2023-12-07T16:36:17Z)
• Engineering phonon-phonon interactions in multimode circuit quantum acousto-dynamics [1.8960797847221296]
  We show an in-situ tunable beam-splitter-type interaction between several mechanical modes of a high-overtone bulk acoustic wave resonator. The engineered interaction is mediated by a parametrically driven superconducting transmon qubit. Our results lay the foundations for using phononic systems as quantum memories and platforms for quantum simulations.
  arXiv  Detail & Related papers  (2023-03-01T18:45:04Z)
• 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)
• A quantum dot-based frequency multiplier [0.0]
  We present a quantum dot-based radiofrequency multiplier operated at cryogenic temperatures. We implement the multiplier in a multi-gate silicon nanowire transistor using two complementary device configurations. Our results demonstrate a method for high-frequency conversion that could be readily integrated into silicon-based quantum computing systems.
  arXiv  Detail & Related papers  (2022-11-25T14:09:30Z)
• 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)
• Tuning long-range fermion-mediated interactions in cold-atom quantum simulators [68.8204255655161]
  Engineering long-range interactions in cold-atom quantum simulators can lead to exotic quantum many-body behavior. Here, we propose several tuning knobs, accessible in current experimental platforms, that allow to further control the range and shape of the mediated interactions.
  arXiv  Detail & Related papers  (2022-03-31T13:32:12Z)
• 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)
• Non-classical mechanical states guided in a phononic waveguide [0.0]
  Single-mode waveguide for individual phonons in a suspended silicon micro-structure. Long mechanical lifetime of almost 100 $mu s$ demonstrates possibility of transmission of single phonons over, in principle, tens of centimeters.
  arXiv  Detail & Related papers  (2021-08-13T13:57:28Z)
• Coherent control in the ground and optically excited state of an ensemble of erbium dopants [55.41644538483948]
  Ensembles of erbium dopants can realize quantum memories and frequency converters. In this work, we use a split-ring microwave resonator to demonstrate such control in both the ground and optically excited state.
  arXiv  Detail & Related papers  (2021-05-18T13:03:38Z)
• Measurements of a quantum bulk acoustic resonator using a superconducting qubit [0.0]
  Phonons hold promise for quantum-focused applications as diverse as sensing, information processing, and communication. We describe a piezoelectric quantum bulk acoustic resonator (QBAR) with a 4.88 GHz resonant frequency. We couple this QBAR resonator to a superconducting qubit on a separate die and demonstrate quantum control of the mechanics in the coupled system.
  arXiv  Detail & Related papers  (2020-12-08T17:36:33Z)
• 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)

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.