Ohmic and step noise from a single trapping center hybridized with a Fermi sea

Abstract

We show that single electron tunneling devices such as the Cooper-pair box or double quantum dot can be sensitive to the zero-point fluctuation of a single trapping center hybridized with a Fermi sea. If the trap energy level is close to the Fermi sea and has line-width γ> k_B T, its noise spectrum has an Ohmic Johnson-Nyquist form, whereas for γ< k_B T the noise has a Lorentzian form expected from the semiclassical limit. Trap levels above the Fermi level are shown to lead to steps in the noise spectrum that can be used to probe their energetics, allowing the identification of individual trapping centers coupled to the device.

arXiv commentRevised version to appear in Phys. Rev. Lett

References in corpus (13)

• Quantum state engineering with Josephson-junction devices
• Coherent control of macroscopic quantum states in a single-Cooper-pair box
• Coherent manipulation of electronic states in a double quantum dot
• Manipulation of a single charge in a double quantum dot
• Decoherence and 1/f noise in Josephson qubits
• Charge echo in a Cooper-pair box
• Double Quantum Dots as Detectors of High-Frequency Quantum Noise in Mesoscopic Conductors
• Quantum noise in the Josephson charge qubit
• Low- and high-frequency noise from coherent two-level systems
• Dephasing due to background charge fluctuations
• Charge noise analysis of an AlGaAs/GaAs quantum dot using transmission-type radio-frequency single-electron transistor technique
• Models of environment and T_1 relaxation in Josephson Charge Qubits
• Low-Temperature Decoherence of Qubit Coupled to Background Charges

Cited by in corpus (21)

• 1/f noise: implications for solid-state quantum information
• How to Enhance Dephasing Time in Superconducting Qubits
• Optimal control of a qubit coupled to a non-Markovian environment
• High fidelity one-qubit operations under random telegraph noise
• Temperature square dependence of the low frequency 1/f charge noise in the Josephson junction qubits
• Coherence oscillations in dephasing by non-Gaussian shot noise
• Nonequilibrium Landau-Zener-Stuckelberg spectroscopy in a double quantum dot
• Quantum decoherence of a charge qubit in a spin-fermion model
• Suppression of 1/f noise in one-qubit systems
• Characterization of coherent impurity effects in solid state qubits
• Relaxation of Josephson qubits due to strong coupling to two-level systems
• Microscopic models for charge-noise-induced dephasing of solid-state qubits
• Microscopic model of critical current noise in Josephson-junction qubits: Subgap resonances and Andreev bound states
• Equivalent qubit dynamics under classical and quantum noise
• Decoherence of charge qubit coupled to interacting background charges
• Noise and microresonance of critical current in Josephson junction induced by Kondo trap states
• Loss of quantum coherence due to non-stationary glass fluctuations
• The excitation operator approach to non-Markovian dynamics of quantum impurity models in the Kondo regime
• Spin versus charge noise from Kondo traps
• Dissipative features of the driven spin-fermion system
• Neural Network Based Qubit Environment Characterization