Quantum acoustics with superconducting qubits

By Y. Chu, P. Kharel, W. Renninger, Luke D. Burkhart, Luigi Frunzio, Peter T. Rakich, Robert J. Schoelkopf. Science, 2017

467 citations recorded by the source corpus.

Mechanical systems at the quantum level A number of platforms are being pursued for developing technologies that exploit the enhanced sensing and measurement capabilities of quantum mechanics. Hybrid systems offer the flexibility of combining and optimizing different platforms. Hong et al. combined optomechanical control of motion and single-phonon counting techniques to probabilistically generate a single-phonon Fock state within a nanomechanical resonator. Chu et al. used electromechanical coupling to address a bulk piezoelectric resonator with a superconducting quantum circuit. Both approaches hold promise for developing hybrid quantum technologies. Science, this issue p. 203, p. 199 Single-phonon states can be electrically stored and retrieved in a piezoelectric resonator. Mechanical objects have important practical applications in the fields of quantum information and metrology as quantum memories or transducers for measuring and connecting different types of quantum systems. The field of electromechanics is in pursuit of a robust and highly coherent device that couples motion to nonlinear quantum objects such as superconducting qubits. Here, we experimentally demonstrate a high-frequency bulk acoustic wave resonator that is strongly coupled to a superconducting qubit using piezoelectric transduction with a cooperativity of 260. We measure qubit and mechanical coherence times on the order of 10 microseconds. Our device requires only simple fabrication methods and provides controllable access to a multitude of phonon modes. We demonstrate quantum control and measurement on gigahertz phonons at the single-quantum level.

Subfields: Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/d1fe746a3d21c8e97f29eb52b5062f3ec8b2f755

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Topological photonics (2018, background): “Other optomechanical systems to implement synthetic gauge fields include quantum wells (Poshakinskiy and Poddubny, 2017) and superconducting circuits (O’Connell et al., 2010; Gustafsson et al., 2014; Chu et al., 2017; Clark et al., 2017).”
Quantum information processing with superconducting circuits: a review (2016, background): “The recent development of bulk acoustic resonators [238, 245] has made possible the exper imental demonstration [246] of a high frequency, highQ, bulk acoustic wave resonator (highovertone bulk acoustic resona tor) (HBAR) that is strongly coupled to a superconducting transmon qubit using piezoel”
Quantum technology for military applications (2021, background): “chemical and precise acoustic detection) • Timeline expectation: short- to medium term • Main challenges: improving resolution Quantum technologies can be used for ultra-precise sound sensing up to the level of a phonon, a quasiparticle quantising sound waves in solid matter [144, 145], using photoa”
Microwave photonics with superconducting quantum circuits (2017, background): “Very recently, transmons have also been coupled to resonators for surface acoustic waves [163] and bulk acoustic waves [164] in piezoelectric substrates.”
Cavity magnonics (2021, background): “Secondly, the detuning between both systems can be tuned dynamically either by changing the frequency of a flux-tunable qubit (Chu et al., 2018; Hofheinz et al., 2009, 2008; Satzinger et al., 2018) or a fixed-frequency qubit through a time-controlled acStark shift (Chu et al., 2017).”
Topological acoustics (2022, background): “More recent studies have also demonstrated an acoustic approach to the manipulation of quantum information, for example, by coupling acoustic modes to a superconducting qubit [5].”