Observation and manipulation of quantum interference in a superconducting Kerr parametric oscillator

Abstract

Quantum tunneling is the phenomenon that makes superconducting circuits "quantum". Recently, there has been a renewed interest in using quantum tunneling in phase space of a Kerr parametric oscillator as a resource for quantum information processing. Here, we report a direct observation of quantum interference induced by such tunneling in a planar superconducting circuit through Wigner tomography. We experimentally elucidate all essential properties of this quantum interference, such as mapping from Fock states to cat states, a temporal oscillation due to the pump detuning, as well as its characteristic Rabi oscillations and Ramsey fringes. Finally, we perform gate operations as manipulations of the observed quantum interference. Our findings lay the groundwork for further studies on quantum properties of superconducting Kerr parametric oscillators and their use in quantum information technologies.

References in corpus (40)

• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• QuTiP 2: A Python framework for the dynamics of open quantum systems
• QuTiP: An open-source Python framework for the dynamics of open quantum systems
• Circuit Quantum Electrodynamics
• A Quantum Engineer's Guide to Superconducting Qubits
• Microwave photonics with superconducting quantum circuits
• A Superconducting Persistent Current Qubit
• Reconstruction of non-classical cavity field states with snapshots of their decoherence
• Confining the state of light to a quantum manifold by engineered two-photon loss
• Macroscopically distinct quantum superposition states as a bosonic code for amplitude damping
• The Kerr-Cat Qubit: Stabilization, Readout, and Gates
• Engineering the quantum states of light in a Kerr-nonlinear resonator by two-photon driving
• Exponential suppression of bit-flips in a qubit encoded in an oscillator
• Bifurcation-based adiabatic quantum computation with a nonlinear oscillator network: Toward quantum soft computing
• Bias-preserving gates with stabilized cat qubits
• Quantum annealing with a network of all-to-all connected, two-photon driven Kerr nonlinear oscillators
• Stabilized Cat in Driven Nonlinear Cavity: A Fault-Tolerant Error Syndrome Detector
• Generation of discrete superpositions of coherent states in the anharmonic oscillator model
• Tutorial: Gate-based superconducting quantum computing
• Universal quantum computation with a nonlinear oscillator network
• Quantum Computation Based on Quantum Adiabatic Bifurcations of Kerr-Nonlinear Parametric Oscillators
• Robust quantum optimizer with full connectivity
• Single-shot Readout of a Superconducting Qubit using a Josephson Parametric Oscillator
• Phase Space Crystals: A New Way to Create a Quasienergy Band Structure
• Josephson parametric phase-locked oscillator and its application to dispersive readout of superconducting qubits
• Exact results for Schrödinger cats in driven-dissipative systems and their feedback control
• Quantum interference in the classically forbidden region: a parametric oscillator
• Condensed Matter Physics in Time Crystals
• A quantum annealer with fully programmable all-to-all coupling via Floquet engineering
• Preparing quasienergy states on demand: A parametric oscillator
• High-accuracy Ising machine using Kerr-nonlinear parametric oscillators with local four-body interactions
• Two-photon driven Kerr resonator for quantum annealing with three-dimensional circuit QED
• Quantum Gate for Kerr Nonlinear Parametric Oscillator Using Effective Excited States
• Controls of a superconducting quantum parametron under a strong pump field
• On-Demand Generation of Traveling Cat States Using a Parametric Oscillator
• Quantum versus classical switching dynamics of driven-dissipative Kerr resonators
• Two-qubit gate using conditional driving for highly detuned Kerr-nonlinear parametric oscillators
• Fast generation of Cat states in Kerr nonlinear resonators via optimal adiabatic control
• Nearly quantum-limited Josephson-junction Frequency Comb synthesizer
• Noise properties of a Josephson parametric oscillator

Cited by in corpus (23)

• Universal control of a bosonic mode via drive-activated native cubic interactions
• Autoparametric resonance extending the bit-flip time of a cat qubit up to 0.3 s
• Effective versus Floquet theory for the Kerr parametric oscillator
• High-Coherence Kerr-cat qubit in 2D architecture
• Driving superconducting qubits into chaos
• Entangling Schrödinger's cat states by bridging discrete- and continuous-variable encoding
• Preparing Schrödinger cat states in a microwave cavity using a neural network
• Harnessing two-photon dissipation for enhanced quantum measurement and control
• Symmetrically Threaded Superconducting Quantum Interference Devices As Next Generation Kerr-cat Qubits
• Quantum squeezing amplification with a weak Kerr nonlinear oscillator
• Fast elementary gates for universal quantum computation with Kerr parametric oscillator qubits
• Dynamic compensation for pump-induced frequency shift in Kerr-cat qubit initialization
• Engineering the Nonlinearity of Bosonic Modes with a Multi-loop SQUID
• Impact of chaos on the excited-state quantum phase transition of the Kerr parametric oscillator
• Asymmetry Control in a Parametric Oscillator for the Quantum Simulation of Chemical Activation
• Unraveling the switching dynamics in a quantum double-well potential
• Residual-$ZZ$-coupling suppression and fast two-qubit gate for Kerr-cat qubits based on level-degeneracy engineering
• Negative Wigner function by decaying interaction from equilibrium
• Phase transitions, symmetries, and tunneling in Kerr parametric oscillators
• Quantum annealing in capacitively coupled Kerr parametric oscillators using frequency-chirped drives
• High-performance conditional-driving gate for Kerr parametric oscillator qubits
• Degeneracy beyond the parity-symmetry protection in one-dimensional spinless models: The parity-violating Kerr parametric oscillator
• Exact amplitudes of parametric processes in driven Josephson circuits