By a News Reporter-Staff News Editor at Electronics Newsweekly -- Data detailed on Quantum Dots have been presented. According to news reporting originating from Paderborn, Germany, by VerticalNews correspondents, research stated, "Improving the quantum coherence of solid-state systems that mimic two-level atoms, for instance spin qubits or single-photon emitters using semiconductor quantum dots, involves dealing with the noise inherent to the device. Charge noise results in a fluctuating electric field, spin noise in a fluctuating magnetic field at the location of the qubit, and both can lead to dephasing and decoherence of optical and spin states."
Our news editors obtained a quote from the research from the University of Paderborn, "We investigate noise in an ultrapure semiconductor device using a minimally invasive, ultrasensitive local probe: resonance fluorescence from a single quantum dot. We distinguish between charge noise and spin noise through a crucial difference in their optical signatures. Noise spectra for both electric and magnetic fields are derived from 0.1 Hz to 100 kHz. The charge noise dominates at low frequencies, spin noise at high frequencies."
According to the news editors, the research concluded: "The noise falls rapidly with increasing frequency, allowing us to demonstrate transform-limited quantum-dot optical linewidths by operating the device above 50 kHz."
For more information on this research see: Charge noise and spin noise in a semiconductor quantum device. Nature Physics, 2013;9(9):570-575. Nature Physics can be contacted at: Nature Publishing Group, Macmillan Building, 4 Crinan St, London N1 9XW, England. (Nature Publishing Group - www.nature.com/; Nature Physics - www.nature.com/nphys/)
The news editors report that additional information may be obtained by contacting A.V. Kuhlmann, University of Paderborn, Dept. of Phys, D-33098 Paderborn, Germany. Additional authors for this research include J. Houel, A. Ludwig, L. Greuter, D. Reuter, A.D. Wieck, M. Poggio and R.J. Warburton.
Keywords for this news article include: Europe, Germany, Paderborn, Electronics, Quantum Dots, Semiconductor, Nanotechnology, Emerging Technologies
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