Observation of quantum many-body effects due to zero point fluctuations in superconducting circuits
arXiv:1910.08340 · doi:10.1038/s41467-019-13199-x
Abstract
Electromagnetic fields possess zero point fluctuations (ZPF) which lead to observable effects such as the Lamb shift and the Casimir effect. In the traditional quantum optics domain, these corrections remain perturbative due to the smallness of the fine structure constant. To provide a direct observation of non-perturbative effects driven by ZPF in an open quantum system we wire a highly non-linear Josephson junction to a high impedance transmission line, allowing large phase fluctuations across the junction. Consequently, the resonance of the former acquires a relative frequency shift that is orders of magnitude larger than for natural atoms. Detailed modelling confirms that this renormalization is non-linear and quantum. Remarkably, the junction transfers its non-linearity to about 30 environmental modes, a striking back-action effect that transcends the standard Caldeira-Leggett paradigm. This work opens many exciting prospects for longstanding quests such as the tailoring of many-body Hamiltonians in the strongly non-linear regime, the observation of Bloch oscillations, or the development of high-impedance qubits.
10 pages, 4 figures and Supplementary Material
References in corpus (9)
- Charge insensitive qubit design derived from the Cooper pair box
- Quantum fluids of light
- Quantum phase transitions of light
- Black-box superconducting circuit quantization
- Implementation of low-loss superinductances for quantum circuits
- Josephson junction-embedded transmission-line resonators: from Kerr medium to in-line transmon
- Quantum Superinductor with Tunable Non-Linearity
- Inelastic Microwave Photon Scattering off a Quantum Impurity in a Josephson-Junction Array
- Electron heating in metallic resistors at sub-Kelvin temperature
Cited by in corpus (35)
- The quantum sine-Gordon model with quantum circuits
- Collective radiation from distant emitters
- Ultrastrong waveguide QED with giant atoms
- Absence versus Presence of Dissipative Quantum Phase Transition in Josephson Junctions
- Nonperturbative Waveguide Quantum Electrodynamics
- Bound states in ultrastrong waveguide QED
- Critical fluorescence of a transmon at the Schmid transition
- Spin-boson quantum phase transition in multilevel superconducting qubits
- Bolometric detection of Josephson inductance in a highly resistive environment
- Soliton Confinement in a Quantum Circuit
- Quantum bath engineering of a high impedance microwave mode through quasiparticle tunneling
- Tuning the inductance of Josephson junction arrays without SQUIDs
- Inelastic decay from integrability
- Emergent quantum phase transition of a Josephson junction coupled to a high-impedance multimode resonator
- Observation of the Schmid-Bulgadaev dissipative quantum phase transition
- Direct detection of down-converted photons spontaneously produced at a single Josephson junction
- Heat bath in a quantum circuit
- Band engineering and study of disorder using topology in compact high kinetic inductance cavity arrays
- Frustration-induced anomalous transport and strong photon decay in waveguide QED
- Nonequilibrium Steady State and Heat Transport in Nonlinear Open Quantum Systems: Stochastic Influence Action and Functional Perturbative Analysis
- Quantum Electronic Circuits for Multicritical Ising Models
- Discrete time translation symmetry breaking in a Josephson junction laser
- Bloch oscillations in a transmon embedded in a resonant electromagnetic environment
- Radiative Properties of an Artificial Atom coupled to a Josephson Junction Array
- Circuit QED theory of direct and dual Shapiro steps with finite-size transmission line resonators
- Resilience of the quantum critical line in the Schmid transition
- Pure kinetic inductance coupling for cQED with flux qubits
- Quantum zero point electromagnetic energy difference between the superconducting and the normal phase in a HTc superconducting metal bulk sample
- Quantum system dynamics with a weakly nonlinear Josephson junction bath
- Singular transport in non-equilibrium strongly internal-coupled 1D tilted field spin-1/2 chain
- Nonequilibrium plasmon liquid in a Josephson junction chain
- Static impurity in a mesoscopic system of SU() fermionic matter-waves
- Rescaling of Applied Oscillating Voltages in Small Josephson Junctions
- Josephson Photonics with Simultaneous Resonances
- Revisiting dissipation-driven phase transition in a Josephson junction