Telegraph Noise in Coupled Quantum Dot Circuits Induced by a Quantum Point Contact

Abstract

Charge detection utilizing a highly biased quantum point contact has become the most effective probe for studying few electron quantum dot circuits. Measurements on double and triple quantum dot circuits is performed to clarify a back action role of charge sensing on the confined electrons. The quantum point contact triggers inelastic transitions, which occur quite generally. Under specific device and measurement conditions these transitions manifest themselves as bounded regimes of telegraph noise within a stability diagram. A nonequilibrium transition from artificial atomic to molecular behavior is identified. Consequences for quantum information applications are discussed.

4 pages, 3 figures (as published)

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Cited by in corpus (26)

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• Architecture for high-sensitivity single-shot readout and control of the electron spin of individual donors in silicon
• Quantum interference and phonon-mediated back-action in lateral quantum dot circuits
• Nonequilibrium Landau-Zener-Stuckelberg spectroscopy in a double quantum dot
• Phonon-mediated vs. Coulombic Back-Action in Quantum Dot circuits
• Decoherence of spin qubits due to a nearby charge fluctuator in gate-defined double dots
• Suppression of Decoherence and Disentanglement by the Exchange Interaction
• Phonon-mediated non-equilibrium interaction between nanoscale devices
• Phonon-mediated decoherence in triple quantum dot interferometers
• Detector Backaction on the Self-Consistent Bound State in Quantum Point Contacts
• Non-Gaussian signatures and collective effects in charge noise affecting a dynamically-decoupled qubit
• Enhanced shot noise in asymmetric interacting two level systems
• Magneto-electrical subbands of freely suspended quantum point contacts
• Intrinsic Metastabilities in the Charge Configuration of a Double Quantum Dot
• Determination of energy scales in few-electron double quantum dots
• Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlations
• Dynamical decoupling of a singlet-triplet qubit afflicted by a charge fluctuator
• Based-nonequilibrium-environment non-Markovianity, quantum Fisher information and quantum coherence
• Tunable Charge Detectors for Semiconductor Quantum Circuits
• Monitoring quantum transport: Backaction and measurement correlations
• Coherent Quantum Ratchets Driven by Tunnel Oscillations
• 1/f Flux Noise in low-T${}_c$ SQUIDs due to Superparamagnetic Phase Transitions in Defect Clusters
• Real-time observation of charge-spin cooperative dynamics driven by a nonequilibrium phonon environment
• Field effect induced mesoscopic devices in depleted two dimensional electron systems
• Multistability and spin diffusion enhanced lifetimes in dynamic nuclear polarization in a double quantum dot
• A Tuneable Few Electron Triple Quantum Dot