Towards understanding two-level-systems in amorphous solids -- Insights from quantum circuits

Abstract

Amorphous solids show surprisingly universal behaviour at low temperatures. The prevailing wisdom is that this can be explained by the existence of two-state defects within the material. The so-called standard tunneling model has become the established framework to explain these results, yet it still leaves the central question essentially unanswered -- what are these two-level defects? This question has recently taken on a new urgency with the rise of superconducting circuits in quantum computing, circuit quantum electrodynamics, magnetometry, electrometry and metrology. Superconducting circuits made from aluminium or niobium are fundamentally limited by losses due to two-level defects within the amorphous oxide layers encasing them. On the other hand, these circuits also provide a novel and effective method for studying the very defects which limit their operation. We can now go beyond ensemble measurements and probe individual defects -- observing the quantum nature of their dynamics and studying their formation, their behaviour as a function of applied field, strain, temperature and other properties. This article reviews the plethora of recent experimental results in this area and discusses the various theoretical models which have been used to describe the observations. In doing so, it summarises the current approaches to solving this fundamentally important problem in solid-state physics.

34 pages, 7 figures, 1 table

References in corpus (58)

• Hybrid quantum systems based on magnonics
• Coherent quantum state storage and transfer between two phase qubits via a resonant cavity
• Superconducting qubit in waveguide cavity with coherence time approaching 0.1ms
• Suppressing Charge Noise Decoherence in Superconducting Charge Qubits
• Experimental evidence for a surface distribution of two-level systems in superconducting lithographed microwave resonators
• Fluctuations of Energy-Relaxation Times in Superconducting Qubits
• Decoherence benchmarking of superconducting qubits
• Microwave Dielectric Loss at Single Photon Energies and milliKelvin Temperatures
• Reducing intrinsic loss in superconducting resonators by surface treatment and deep etching of silicon substrates
• State tomography of capacitively shunted phase qubits with high fidelity
• Model for l/f Flux Noise in SQUIDs and Qubits
• Optomechanical sideband cooling of a micromechanical oscillator close to the quantum ground state
• Low- and high-frequency noise from coherent two-level systems
• Dephasing of a superconducting flux qubit
• Observation of directly interacting coherent two-level systems in a solid
• Analysis and mitigation of interface losses in trenched superconducting coplanar waveguide resonators
• Magnetism in SQUIDs at Millikelvin Temperatures
• A semi-empirical model for two-level system noise in superconducting microresonators
• Minimal resonator loss for circuit quantum electrodynamics
• Microscopic origin of low frequency flux noise in Josephson circuits
• Observation of classical-quantum crossover of 1/f flux noise and its paramagnetic temperature dependence
• Characterization and reduction of microfabrication-induced decoherence in superconducting quantum circuits
• Quantum two-level systems in Josephson junctions as naturally formed qubits
• Measurement-induced qubit state mixing in circuit QED from up-converted dephasing noise
• Generalized Tunneling Model for TLS in amorphous materials and its predictions for their dephasing and the noise in superconducting microresonators
• Contribution of dielectrics to frequency and noise of NbTiN superconducting resonators
• Suppression of 1/f noise in solid state quantum devices by surface spin desorption
• Direct identification of dilute surface spins on Al${}_2$O${}_3$: Origin of flux noise in quantum circuits
• Measuring the temperature dependence of individual two-level systems by direct coherent control
• Spin-like susceptibility of metallic and insulating thin films at low temperature
• Temperature Dependence of the Frequency and Noise of Superconducting Coplanar Waveguide Resonators
• Quantum Friction in Nanomechanical Oscillators at Millikelvin Temperatures
• Reduced frequency noise in superconducting resonators
• Complete stabilization and improvement of the characteristics of tunnel junctions by thermal annealing
• Microscopic Model of Critical Current Noise in Josephson Junctions
• Anomalous avoided level crossings in a Cooper-pair box spectrum
• Quantum decoherence of a charge qubit in a spin-fermion model
• Dissipation due to two-level systems in nano-mechanical devices
• Delocalised oxygen as the origin of two-level defects in Josephson junctions
• Quantitative evaluation of defect-models in superconducting phase qubits
• Noise and loss of superconducting aluminium resonators at single photon energies
• Evidence of universality in the dynamical response of micromechanical diamond resonators at millikelvin temperatures
• Multi-photon spectroscopy of a hybrid quantum system
• Probing individual tunneling fluctuators with coherently controlled tunneling systems
• Relaxation of Josephson qubits due to strong coupling to two-level systems
• Identification of structural motifs as tunneling two-level systems in amorphous alumina at low temperatures
• Quantum dynamics in a camel-back potential of a dc SQUID
• Microscopic model of critical current noise in Josephson-junction qubits: Subgap resonances and Andreev bound states
• Revealing the nonlinear response of a tunneling two-level system ensemble using coupled modes
• Slow noise processes in superconducting resonators
• Transmission-line resonators for the study of individual two-level tunneling systems
• Non-equilibrium probing of two-level charge fluctuators using the step response of a single electron transistor
• Atomic delocalisation as a microscopic origin of two-level defects in Josephson junctions
• Quasiparticle poisoning and Josephson current fluctuations induced by Kondo impurities
• Nonuniversality and strongly interacting two-level systems in glasses at low temperatures
• Theory of nonlinear microwave absorption by interacting two-level systems
• Structural evolution of Re (0001) thin films grown on Nb (110) surfaces by molecular beam epitaxy
• Coupling mechanism between microscopic two-level system and superconducting qubits

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