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

2008/01/31 by D. Taubert, Michel Pioro-Ladrière, M. Pioro-Ladrière +6 · 4 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Charge (physics) #Computer science #Condensed matter physics #Electron #Electronic circuit #Noise (video) #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum point contact #Quantum well #cond-mat.mes-hall

paper · pdf · doi:10.1103/physrevlett.100.176805

published as Phys. Rev. Lett. 100, 176805 (2008) · 4 pages, 3 figures (as published)

openalex publication_date 2008/05/02 · arxiv created 2008/05/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

Citations

• Electrostatically defined serial triple quantum dot charged with few electrons
• Addition spectrum of a lateral dot from Coulomb and spin-blockade spectroscopy
• Double-Dot Quantum Ratchet Driven by an Independently Biased Quantum Point Contact
• Coherent Manipulation of Coupled Electron Spins in Semiconductor Quantum Dots
• Single-shot read-out of an individual electron spin in a quantum dot

Cited by

• Environmental noise spectroscopy with qubits subjected to dynamical decoupling
• 1/f flux noise in low-Tc SQUIDs due to superparamagnetic phase transitions in defect clusters
• Based-nonequilibrium-environment non-markovianity, quantum Fisher information and quantum coherence
• Coherent quantum ratchets driven by tunnel oscillations: Fluctuations and correlations