Related papers: Quantum Otto Thermal Machines Powered by Kerr Nonlinearity

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Kerr nonlinearity and three-wave mixing in superconducting resonators hosting Al-InAs weak links [0.0]
Microwave resonators are a versatile tool in quantum information processing, enabling parametric amplification, continuous variable quantum computing, and engineered mode interactions.<n>Many of these applications especially benefit from cubic nonlinearities enabling three-wave mixing; at the same time, they are limited by quartic nonlinearities giving rise to undesired Kerr effects.<n>A recurrent challenge is therefore to engineer resonators with a finite cubic nonlinearity while suppressing quartic terms.<n>Here, we investigate a superconducting resonator hosting two weak links fabricated from an aluminum-capped indium arsenide nanowire.
arXiv Detail & Related papers (2026-08-28T15:12:31Z)
Stability Analysis of Three Coupled Kerr Oscillators: Implications for Quantum Computing [0.0]
We investigate the classical dynamics of optical nonlinear Kerr couplers, focusing on their potential relevance to quantum computing applications.<n>The system is driven by an external periodic field and includes dissipative processes.<n>We show that even for identical Kerr media, the interplay between nonlinear couplings and mismatched fundamental and pump frequencies leads to rich and complex dynamics.<n>A key contribution of this work is a detailed stability analysis based on the numerical calculation of Lyapunov exponents, which reveals transitions from regular to chaotic dynamics as damping is reduced.
arXiv Detail & Related papers (2025-06-23T21:31:17Z)
Saturable nonlinearity induced quantum correlations in optomechanics [0.0]
We propose a scheme that induces quantum correlations in optomtomechanical systems.<n>By turning on the nonlinearities, gain and losses are switched on, enabling flexible generation of both quantum entanglement and quantum steering.<n>This work suggests a way of using nonlinear saturation effects to engineer quantum correlations even at room temperature.
arXiv Detail & Related papers (2025-06-12T13:59:28Z)
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)
A mechanical qubit [2.123237925838863]
Single-phonon anharmonicity in our system exceeds the decoherence rate by a factor of 6.8. Our work adds another unique capability to a powerful quantum acoustics platform for quantum simulations, sensing, and information processing.
arXiv Detail & Related papers (2024-06-11T15:27:02Z)
In-situ-tunable spin-spin interactions in a Penning trap with in-bore optomechanics [41.94295877935867]
We present an optomechanical system for in-situ tuning of the coherent spin-motion and spin-spin interaction strength. We characterize the system using measurements of the induced mean-field spin precession. These experiments show approximately a $times2$ variation in the ratio of the coherent to incoherent interaction strength.
arXiv Detail & Related papers (2024-01-31T11:00:39Z)
Weak Kerr Nonlinearity Boosts the Performance of Frequency-Multiplexed Photonic Extreme Learning Machines: A Multifaceted Approach [49.1574468325115]
We investigate the Kerr nonlinearity impact on the performance of a frequency-multiplexed Extreme Learning Machine (ELM) The Kerr nonlinearity facilitates the randomized neuron connections allowing for efficient information mixing. We introduce a model to show that, in frequency-multiplexed ELMs, the Kerr nonlinearity mixes information via four-wave mixing, rather than via self- or cross-phase modulation.
arXiv Detail & Related papers (2023-12-19T16:18:59Z)
Resolving Fock states near the Kerr-free point of a superconducting resonator [51.03394077656548]
We have designed a tunable nonlinear resonator terminated by a SNAIL (Superconducting Asymmetric Inductive eLement) We have excited photons near this Kerr-free point and characterized the device using a transmon qubit.
arXiv Detail & Related papers (2022-10-18T09:55:58Z)
Quantum Squeezing of Slow-Light Dark Solitons via Electromagnetically Induced Transparency [0.0]
We consider the quantum effect of slow light dark soliton (SLDS) in a cold atomic gas with defocuing Kerr nonlinearity via electromagnetically induced transparency (EIT) We calculate the quantum fluctuations of the SLDS by solving the relevant non-Hermitian eigenvalue problem describing the quantum fluctuations. We demonstrate that, due to the large Kerr nonlinearity contributed from the EIT effect, a significant quantum squeezing of the SLDS can be realized.
arXiv Detail & Related papers (2022-02-21T05:33:48Z)
Quantum circuits for the preparation of spin eigenfunctions on quantum computers [63.52264764099532]
Hamiltonian symmetries are an important instrument to classify relevant many-particle wavefunctions. This work presents quantum circuits for the exact and approximate preparation of total spin eigenfunctions on quantum computers.
arXiv Detail & Related papers (2022-02-19T00:21:46Z)
Frequency-tunable Kerr-free three-wave mixing with a gradiometric SNAIL [0.0]
Three-wave mixing is a key process in superconducting quantum information processing. SNAIL-based devices present a Kerr-free flux-bias point where unwanted parasitic effects such as Stark shift are suppressed. With a single flux-bias parameter, these circuits can only host one Kerr-free point, limiting the range of their applications.
arXiv Detail & Related papers (2021-12-17T21:58:05Z)
The quantum Otto cycle in a superconducting cavity in the non-adiabatic regime [62.997667081978825]
We analyze the efficiency of the quantum Otto cycle applied to a superconducting cavity. It is shown that, in a non-adiabatic regime, the efficiency of the quantum cycle is affected by the dynamical Casimir effect.
arXiv Detail & Related papers (2021-11-30T11:47:33Z)
Designing Kerr Interactions for Quantum Information Processing via Counterrotating Terms of Asymmetric Josephson-Junction Loops [68.8204255655161]
static cavity nonlinearities typically limit the performance of bosonic quantum error-correcting codes. Treating the nonlinearity as a perturbation, we derive effective Hamiltonians using the Schrieffer-Wolff transformation. Results show that a cubic interaction allows to increase the effective rates of both linear and nonlinear operations.
arXiv Detail & Related papers (2021-07-14T15:11:05Z)
Echoes in a Single Quantum Kerr-nonlinear Oscillator [0.0]
We theoretically study the echo phenomenon in a single impulsively excited ("kicked") Kerr-nonlinear oscillator. We reveal two types of echoes, "quantum" and "classical" ones, emerging on the long and short time-scales. These echoes may be useful for studying decoherence processes in a number of systems related to quantum information processing.
arXiv Detail & Related papers (2020-09-03T12:19:19Z)

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