Noise spectrum of a tunnel junction coupled to a nanomechanical oscillator
arXiv:cond-mat/0701247 · doi:10.1103/PhysRevB.75.205319
Abstract
A nanomechanical resonator coupled to a tunnel junction is studied. The oscillator modulates the transmission of the junction, changing the current and the noise spectrum. The influence of the oscillator on the noise spectrum of the junction is investigated, and the noise spectrum is obtained for arbitrary frequencies, temperatures and bias voltages. We find that the noise spectrum consists of a noise floor and a peaked structure with peaks at zero frequency, the oscillator frequency and twice the oscillator frequency. The influence of the oscillator vanishes if the bias voltage of the junction is lower than the oscillator frequency. We demonstrate that the peak at the oscillator frequency can be used to determine the oscillator occupation number, showing that the current noise in the junction functions as a thermometer for the oscillator.
arXiv comment33 pages, 7 figures, references adjusted
References in corpus (16)
- A tunable carbon nanotube electromechanical oscillator
- Towards quantum superpositions of a mirror
- Radiation-pressure cooling and optomechanical instability of a micro-mirror
- Self-cooling of a micro-mirror by radiation pressure
- Cooling a nanomechanical resonator with quantum back-action
- Double Quantum Dots as Detectors of High-Frequency Quantum Noise in Mesoscopic Conductors
- Quantum-Limited Position Detection and Amplification: A Linear Response Perspective
- Measurement induced quantum-classical transition
- Quantum nano-electromechanics with electrons, quasiparticles and Cooper pairs: effective bath descriptions and strong feedback effects
- Spontaneous Relaxation of a Charge Qubit under Electrical Measurement
- Superconducting Qubits Coupled to Nanoelectromechanical Resonators: An Architecture for Solid-State Quantum Information Processing
- Dynamics of a nanomechanical resonator coupled to a superconducting single-electron transistor
- Shot Noise of a Tunnel Junction Displacement Detector
- Nonequilibrium Fluctuations and Decoherence in Nanomechanical Devices Coupled to the Tunnel Junction
- Statistics of charge transfer in a tunnel junction coupled to an oscillator
- Noise properties of two single electron transistors coupled by a nanomechanical resonator
Cited by in corpus (6)
- Detecting phonon blockade with photons
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- Measuring the Momentum of a Nanomechanical Oscillator through the Use of Two Tunnel Junctions
- Momentum and position detection in nanoelectromechanical systems beyond Born and Markov approximations
- Coulomb blockade for an oscillating tunnel junction