Observation of quantum oscillations in the extreme weak anharmonic limit

• URL: http://arxiv.org/abs/2401.04227v1
• Date: Mon, 8 Jan 2024 20:37:00 GMT
• Title: Observation of quantum oscillations in the extreme weak anharmonic limit
• Authors: A. Th\'ery, B. Neukelmance, B. Hue, W. Legrand, L. Jarjat, J. Craquelin, M. Villiers, A. Cottet, M.R. Delbecq and T. Kontos
• Abstract summary: We investigate a granular aluminium quantum circuit with anharmonicity of the order of its decoherence rate in a 3-dimensional microwave cavity. We perform single qubit-like manipulations such as Rabi oscillations and Ramsey fringes.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We investigate a granular aluminium quantum circuit with an anharmonicity of the order of its decoherence rate in a 3-dimensional microwave cavity. We perform single qubit-like manipulations such as Rabi oscillations and Ramsey fringes. Our findings, supported by quantitative numerical modeling, show that a very weakly anharmonic oscillator can also display quantum oscillations outside the qubit regime. These oscillations are hard to disambiguate from qubit oscillations in time domain measurements for a single driving frequency. This sheds new light on recent findings for new material superconducting quantum bits. Our platform shows in addition large magnetic field resilience which could find applications for quantum enhanced dark matter search.

Related papers

• Nonlinear dynamical Casimir effect and Unruh entanglement in waveguide QED with parametrically modulated coupling [83.88591755871734]
  We study theoretically an array of two-level qubits moving relative to a one-dimensional waveguide. When the frequency of this motion approaches twice the qubit resonance frequency, it induces parametric generation of photons and excitation of the qubits. We develop a comprehensive general theoretical framework that incorporates both perturbative diagrammatic techniques and a rigorous master-equation approach.
  arXiv  Detail & Related papers  (2024-08-30T15:54:33Z)
• Quantum squeezing in a nonlinear mechanical oscillator [2.203084162322062]
  Mechanical degrees of freedom are natural candidates for continuous-variable quantum information processing. We demonstrate ground state squeezing of a gigahertz-frequency mechanical resonator coupled to a superconducting qubit.
  arXiv  Detail & Related papers  (2023-12-26T18:57:01Z)
• Acoustic frequency atomic spin oscillator in the quantum regime [2.1057988880229024]
  Quantum back-action of the spin measurement and ponderomotive squeezing of light are observed at spin oscillation down to 6 kHz. Results constitute an important step towards quantum noise reduction and entanglement-enhanced sensing in the acoustic range. Results are relevant for broadband noise reduction in gravitational wave detectors.
  arXiv  Detail & Related papers  (2023-03-20T11:20:50Z)
• All-Optical Nuclear Quantum Sensing using Nitrogen-Vacancy Centers in Diamond [52.77024349608834]
  Microwave or radio-frequency driving poses a significant limitation for miniaturization, energy-efficiency and non-invasiveness of quantum sensors. We overcome this limitation by demonstrating a purely optical approach to coherent quantum sensing. Our results pave the way for highly compact quantum sensors to be employed for magnetometry or gyroscopy applications.
  arXiv  Detail & Related papers  (2022-12-14T08:34:11Z)
• 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)
• Quantum critical dynamics in a 5000-qubit programmable spin glass [1.1940694880568357]
  We realize quantum critical spin-glass dynamics on thousands of qubits with a superconducting quantum annealer. We extract critical exponents that clearly distinguish quantum annealing from Monte Carlo algorithms.
  arXiv  Detail & Related papers  (2022-07-27T21:23:46Z)
• 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)
• Dark Exciton Giant Rabi Oscillations with no External Magnetic Field [0.0]
  We study a system consisting of a semiconductor quantum dot pumped by a driving laser, and coupled to an acoustic cavity. This kind of systems has proven to yield interesting multi-phonon phenomena, but the description of the quantum dot has been limited to a two-level system. We highlight two outstanding features: first, we are able to create dark states excitations in the quantum dot without the usual external magnetic field needed to do so.
  arXiv  Detail & Related papers  (2021-12-07T13:27:18Z)
• Rapid Quantum Squeezing by Jumping the Harmonic Oscillator Frequency [2.229264819097804]
  We create squeezed states of atomic motion by sudden changes of the harmonic oscillation frequency of atoms in an optical lattice. Our results can speed up quantum gates and enable quantum sensing and quantum information processing in noisy environments.
  arXiv  Detail & Related papers  (2021-10-01T08:18:29Z)
• 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)
• Zitterbewegung and Klein-tunneling phenomena for transient quantum waves [77.34726150561087]
  We show that the Zitterbewegung effect manifests itself as a series of quantum beats of the particle density in the long-time limit. We also find a time-domain where the particle density of the point source is governed by the propagation of a main wavefront. The relative positions of these wavefronts are used to investigate the time-delay of quantum waves in the Klein-tunneling regime.
  arXiv  Detail & Related papers  (2020-03-09T21:27:02Z)

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.