Related papers: Engineering Purely Nonlinear Coupling with the Quarton

Engineering Purely Nonlinear Coupling with the Quarton

URL: http://arxiv.org/abs/2010.09959v2
Date: Fri, 27 Nov 2020 20:47:07 GMT
Title: Engineering Purely Nonlinear Coupling with the Quarton
Authors: Yufeng Ye, Kaidong Peng, Mahdi Naghiloo, Gregory Cunningham, and Kevin P. O'Brien
Abstract summary: Strong nonlinear coupling of superconducting qubits and/or photons is a critical building block for quantum information processing. Here, we use the quarton to yield purely nonlinear coupling between two linearly decoupled transmon qubits. The quarton's positive $phi4$ potential can cancel the negative self-Kerr of qubits to linearize them into resonators.
Score: 0.0
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Strong nonlinear coupling of superconducting qubits and/or photons is a critical building block for quantum information processing. Due to the perturbative nature of the Josephson nonlinearity, linear coupling is often used in the dispersive regime to approximate nonlinear coupling. However, this dispersive coupling is weak and the underlying linear coupling mixes the local modes which, for example, distributes unwanted self-Kerr to photon modes. Here, we use the quarton to yield purely nonlinear coupling between two linearly decoupled transmon qubits. The quarton's zero $\phi^2$ potential enables a giant gigahertz-level cross-Kerr which is an order of magnitude stronger compared to existing schemes, and the quarton's positive $\phi^4$ potential can cancel the negative self-Kerr of qubits to linearize them into resonators. This giant cross-Kerr between bare modes of qubit-qubit, qubit-photon, and even photon-photon is ideal for applications such as single microwave photon detection and implementation of bosonic codes.

Related papers

Josephson bifurcation readout: beyond the monochromatic approximation [49.1574468325115]
We analyze properties of bifurcation quantum detectors based on weakly nonlinear superconducting resonance circuits. This circuit can serve as an efficient detector of the quantum state of superconducting qubits.
arXiv Detail & Related papers (2024-05-25T22:22:37Z)
Scaling Enhancement of Photon Blockade in Output Fields [2.823788912109604]
We show that photon blockade can be greatly enhanced in the mixing output field of a nonlinear cavity and an auxiliary (linear) cavity. We identify that this scaling enhancement of photon blockade in the output field is induced by the destructive interference between two of the paths for two photons passing through the two cavities.
arXiv Detail & Related papers (2024-03-27T06:54:53Z)
Nonreciprocal Unconventional Photon Blockade with Kerr Magnons [4.12707909133988]
Nonreciprocal devices, allowing to manipulate one-way signals, are crucial to quantum information processing and quantum network. We propose a nonlinear cavity-magnon system, consisting of a microwave cavity coupled to one or two yttrium-iron-garnet (YIG) spheres supporting magnons with Kerr nonlinearity.
arXiv Detail & Related papers (2024-01-04T13:03:32Z)
Efficient decoupling of a non-linear qubit mode from its environment [0.9533143628888118]
We make use of the design flexibility of superconducting quantum circuits to form a multi-mode element with symmetry-protected modes. The proposed circuit consists of three superconducting islands coupled to a central island via Josephson junctions. We show that the coherence of the qubit is not limited by photon-induced dephasing when detuning the mediator mode from the readout resonator.
arXiv Detail & Related papers (2023-12-28T12:16:29Z)
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)
Nonlinear quantum logic with colliding graphene plasmons [0.0]
Graphene has emerged as a promising platform to bring nonlinear quantum optics to the nanoscale. Subwavelength confinement endows propagating plasmons with %large effective masses a flat band dispersion that enhances their interaction. New results open new exciting avenues towards quantum information and many-body applications with strongly-interacting polaritons.
arXiv Detail & Related papers (2022-07-11T18:32:51Z)
Multipartite spatial entanglement generated by concurrent nonlinear processes [91.3755431537592]
Continuous variables multipartite entanglement is a key resource for quantum technologies. This work considers the multipartite entanglement generated in separated spatial modes of the same light beam by three different parametric sources.
arXiv Detail & Related papers (2021-11-09T17:15:13Z)
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)
Directional emission of down-converted photons from a dielectric nano-resonator [55.41644538483948]
We theoretically describe the generation of photon pairs in the process of spontaneous parametric down-conversion. We reveal that highly directional photon-pair generation can be observed utilising the nonlinear Kerker-type effect.
arXiv Detail & Related papers (2020-11-16T10:30:04Z)

This list is automatically generated from the titles and abstracts of the papers in this site.