Stability of long-sustained oscillations induced by electron tunneling

• URL: http://arxiv.org/abs/2211.04074v2
• Date: Tue, 26 Mar 2024 12:56:59 GMT
• Title: Stability of long-sustained oscillations induced by electron tunneling
• Abstract summary: In quantum devices, self-oscillations may arise due to the interaction between single electron dynamics and mechanical motion. We show that, due to the complexity of this mechanism, these self-oscillations may irrupt, vanish, or exhibit a bistable behaviour causing regimes cycles.
• Score: 0.026562354275399304
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Self-oscillations are the result of an efficient mechanism generating periodic motion from a constant power source. In quantum devices, these oscillations may arise due to the interaction between single electron dynamics and mechanical motion. We show that, due to the complexity of this mechanism, these self-oscillations may irrupt, vanish, or exhibit a bistable behaviour causing hysteresis cycles. We observe these hysteresis cycles and characterize the stability of different regimes in both single and double quantum dot configurations. In particular cases, we find these oscillations stable for over 20 seconds, many orders of magnitude above electronic and mechanical characteristic timescales, revealing the robustness of the mechanism at play.

Related papers

• Multibranched parametric resonance and swallowtail catastrophe in electromechanical oscillators with nonlinear friction [0.0]
  Parametric resonance underpins the operation of a wide range of physical systems.<n>We show that conventional controlled nonlinear friction can induce the coexistence of two distinct pairs of period-two states.
  arXiv  Detail & Related papers  (2026-07-27T05:03:15Z)
• Autonomous oscillations in quantum electromechanics: tensor network treatment [0.0]
  Transport-induced self-sustained oscillations in electromechanical systems convert a static electrochemical bias into robust, autonomous motion.<n>We formulate a tensor-network framework that combines a binary representation of the vibrational mode with mesoscopic reservoir embeddings.<n>We demonstrate the emergence of mechanical self-oscillations across a broad set of operating conditions.
  arXiv  Detail & Related papers  (2026-05-26T17:35:54Z)
• Entanglement of mechanical oscillators mediated by a Rydberg tweezer chain [0.0]
  We propose a quantum system in which two micro-electromechanical oscillators interact through a chain of Rydberg atoms confined in optical tweezers.<n>We utilize the tunability of the radiative decay of the Rydberg atoms for dissipative entanglement generation.<n>Our results highlight the potential to exploit the flexibility and tunability of Rydberg atom chains to generate nonclassical correlations.
  arXiv  Detail & Related papers  (2025-10-09T15:54:38Z)
• Constructive interference at the edge of quantum ergodic dynamics [116.94795372054381]
  We characterize ergodic dynamics using the second-order out-of-time-order correlators, OTOC$(2)$.<n>In contrast to dynamics without time reversal, OTOC$(2)$ are observed to remain sensitive to the underlying dynamics at long time scales.
  arXiv  Detail & Related papers  (2025-06-11T21:29:23Z)
• Controlling complex dynamics with synthetic magnetism in optomechanical systems: A route to enhanced sensor performance [0.20616237122336117]
  We derive the system's semiclassical dynamical equations from the optomechanical Hamiltonian. We illustrate the emergence of novel dynamic behaviors and demonstrate their pertinence for the development of new devices. These findings bear significant implications for applications in ultra-sensitive sensing, chaos-based communication, and tunable phononic circuits.
  arXiv  Detail & Related papers  (2025-02-17T21:45:44Z)
• Thermodynamics of coupled time crystals with an application to energy storage [0.0]
  We study the thermodynamics and fluctuating behavior of two interacting boundary time crystals. We exploit our theoretical derivation to explore possible applications of time crystals as quantum batteries.
  arXiv  Detail & Related papers  (2024-11-07T16:21:26Z)
• Hysteresis and Self-Oscillations in an Artificial Memristive Quantum Neuron [79.16635054977068]
  We study an artificial neuron circuit containing a quantum memristor in the presence of relaxation and dephasing. We demonstrate that this physical principle enables hysteretic behavior of the current-voltage characteristics of the quantum device.
  arXiv  Detail & Related papers  (2024-05-01T16:47:23Z)
• Measurement-induced Clock in a Lattice Ring of Non-interacting Electrons [0.0]
  We study the emergence of periodicity in a non-interacting steady-state quantum system inspired by quantum time crystals' spontaneous time-translation symmetry breaking. Our analysis uncovers time-periodic structures in steady-state two-time correlation functions, with periodicity linked to the system's group velocity.
  arXiv  Detail & Related papers  (2023-12-29T16:37:53Z)
• Exceptional point induced quantum phase synchronization and entanglement dynamics in mechanically coupled gain-loss oscillators [0.0]
  This paper investigates how quantum phase synchronization relates to bipartite Gaussian entanglement in coupled gain-loss mechanical oscillators. We examine the role of exceptional point in a deterministic way of producing self-sustained oscillations that induce robust quantum correlations. These findings hold promise for applications in phonon-based quantum communication and information processing.
  arXiv  Detail & Related papers  (2023-09-12T18:30:51Z)
• Powering an autonomous clock with quantum electromechanics [42.87502453001109]
  We theoretically analyse an autonomous clock comprising a nanoelectromechanical system, which undergoes self-oscillations driven by electron tunnelling. We simulate the dynamics of the system in the quasi-adiabatic limit of slow mechanical motion, allowing us to infer statistical properties of the clock's ticks from the current auto-correlation function.
  arXiv  Detail & Related papers  (2023-07-18T10:08:37Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Instabilities near ultrastrong coupling in microwave optomechanical cavity [0.0]
  We experimentally realize a cavity-electromechanical device using a superconducting waveguide cavity and a mechanical resonator. In the presence of a strong pump, the mechanical-polaritons splitting can nearly reach 81% of the mechanical frequency, overwhelming all the dissipation rates.
  arXiv  Detail & Related papers  (2023-02-01T13:13:09Z)
• Probing dynamics of a two-dimensional dipolar spin ensemble using single qubit sensor [62.997667081978825]
  We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal. We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder. Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
  arXiv  Detail & Related papers  (2022-07-21T18:00:17Z)
• Driving Force and Nonequilibrium Vibronic Dynamics in Charge Separation of Strongly Bound Electron-Hole Pairs [59.94347858883343]
  We study the dynamics of charge separation in one, two and three-dimensional donor-acceptor networks. This allows us to identify the precise conditions in which underdamped vibrational motion induces efficient long-range charge separation.
  arXiv  Detail & Related papers  (2022-05-11T17:51:21Z)
• Mechanical squeezing via unstable dynamics in a microcavity [0.0]
  We show that strong mechanical quantum squeezing in a linear optomechanical system can be generated through the dynamical instability reached in the far red-detuned and ultrastrong coupling regime. We argue for its feasibility for the case of a levitated nanoparticles coupled to a microcavity via coherent scattering. Our results bring forth optical microcavities in the unresolved sideband regime as powerful mechanical squeezers for levitated nanoparticles, and hence as key tools for quantum-enhanced inertial and force sensing.
  arXiv  Detail & Related papers  (2021-12-02T11:40:59Z)
• Observation of Time-Crystalline Eigenstate Order on a Quantum Processor [80.17270167652622]
  Quantum-body systems display rich phase structure in their low-temperature equilibrium states. We experimentally observe an eigenstate-ordered DTC on superconducting qubits. Results establish a scalable approach to study non-equilibrium phases of matter on current quantum processors.
  arXiv  Detail & Related papers  (2021-07-28T18:00:03Z)
• Effects of the dynamical magnetization state on spin transfer [68.8204255655161]
  We show that the complex interactions between the spin-polarized electrons and the dynamical states of the local spins can be decomposed into separate processes. Our results suggest that exquisite control of spin transfer efficiency and of the resulting dynamical magnetization states may be achievable.
  arXiv  Detail & Related papers  (2021-01-21T22:12:03Z)

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.