<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn mathvariant="bold-sans-serif">1</mml:mn><mml:mo>/</mml:mo><mml:mi mathvariant="sans-serif-bold-italic">f</mml:mi></mml:math>noise: Implications for solid-state quantum information

Paladino, E.; Galperin, Y. M.; Falci, G.; Altshuler, B. L.

doi:10.1103/revmodphys.86.361

Cited by 535 publications

(533 citation statements)

References 315 publications

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“…We assume the TLS to be realised as microscopic electric dipoles of uniform dipole size d i = 1e × 10 −10 m, where e is the charge of a single electron 5,18 . Then, assuming parallel orientation of the two TLS and using the relation between dipole magnitude and coupling strength 10) we can estimate the maximum distance to effect a minimum coupling strength of g Min = 1 MHz (c.f. Fig.…”

Section: Effective Inter-tls Interaction Rangementioning

confidence: 99%

“…2∆ sc ω 10 (A. 19) with the junction's plasma frequency ω p = √ 8E J E C and its charging energy E C .…”

Section: Appendix E: Quasiparticle Density Fluctuationsmentioning

confidence: 99%

“…One such cause of decoherence are spurious two-level systems (TLS), which are believed to be present in large numbers in the amorphous dielectric oxide layer covering the superconducting films 5,6 . Ensembles of TLS naturally explain the low-temperature properties of glasses 7,8 and are used as a universal model for 1/f -type low-frequency noise in electric circuits 9,10 .…”

Section: Introductionmentioning

confidence: 99%

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Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits

et al. 2015

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Since the very first experiments, superconducting circuits have suffered from strong coupling to environmental noise, destroying quantum coherence and degrading performance. In state-of-the-art experiments, it is found that the relaxation time of superconducting qubits fluctuates as a function of time. We present measurements of such fluctuations in a 3D-Transmon circuit and develop a qualitative model based on interactions within a bath of background two-level systems (TLS) which emerge from defects in the device material. In our model, the time-dependent noise density acting on the qubit emerges from its near-resonant coupling to high-frequency TLS which experience energy fluctuations due to their interaction with thermally fluctuating TLS at low frequencies. We support the model by providing experimental evidence of such energy fluctuations observed in a single TLS in a phase qubit circuit.

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Section: Effective Inter-tls Interaction Rangementioning

confidence: 99%

“…2∆ sc ω 10 (A. 19) with the junction's plasma frequency ω p = √ 8E J E C and its charging energy E C .…”

Section: Appendix E: Quasiparticle Density Fluctuationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits

et al. 2015

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“…In addition, stochastic modeling allows us to perform a detailed analysis for relevant kinds of noise, which are usually difficult to describe within a full quantum treatment, e.g., Gaussian noise with and without a Lorentzian spectral density. For qubit systems, description of environment-induced decoherence by the interaction with classical fluctuating field has been successfully carried out [73][74][75][76][77][78][79][80][81][82] and this approach has provided insights into the decoherence process for systems of interest in quantum technology.…”

Section: Introductionmentioning

confidence: 99%

Collapse and revival of quantum coherence for a harmonic oscillator interacting with a classical fluctuating environment

et al. 2015

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We address the dynamics of nonclassicality for a quantum system interacting with a noisy fluctuating environment described by a classical stochastic field. As a paradigmatic example, we consider a harmonic oscillator initially prepared in a maximally nonclassical state, e.g., a Fock number state or a Schrödinger-cat-like state, and then coupled to either a resonant or a nonresonant external field. Stochastic modeling allows us to describe the decoherence dynamics without resorting to approximated quantum master equations and to introduce non-Markovian effects in a controlled way. A detailed comparison among different nonclassicality criteria and a thorough analysis of the decoherence time reveal a rich phenomenology whose main features may be summarized as follows: (i) Classical memory effects increase the survival time of quantum coherence and (ii) a detuning between the natural frequency of the system and the central frequency of the classical field induces revivals of quantum coherence.

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“…An analysis of different noise sources is presented on the basis of the study of the environmental spectral densities. In [8] authors reviewed the effect of 1/f noise in nano-devices with emphasis on implications for solid-state quantum information. It has been shown that low frequency noise is an important source of decoherence for superconducting qubits.…”

Section: Introductionmentioning

confidence: 99%

Decoherence of a solid-state qubit by different noise correlation spectra

Villar

Lombardo

2015

Physics Letters A

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The interaction between solid-state qubits and their environmental degrees of freedom produces non-unitary effects like decoherence and dissipation. Uncontrolled decoherence is one of the main obstacles that must be overcome in quantum information processing. We study the dynamically decay of coherences in a solid-state qubit by means of the use of a master equation. We analyse the effects induced by thermal Ohmic environments and low-frequency 1/f noise. We focus on the effect of longitudinal and transversal noise on the superconducting qubit's dynamics. Our results can be used to design experimental future setups when manipulating superconducting qubits.

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1/fnoise: Implications for solid-state quantum information

Cited by 535 publications

References 315 publications

Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits

Interacting two-level defects as sources of fluctuating high-frequency noise in superconducting circuits

Collapse and revival of quantum coherence for a harmonic oscillator interacting with a classical fluctuating environment

Decoherence of a solid-state qubit by different noise correlation spectra

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