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Topic Area: Quantum Electrical Measurements

Displaying records 51 to 60 of 300 records.
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51. Homodyne detection of optical cat states generated by squeezed light photon subtraction
Topic: Quantum Electrical Measurements
Published: 8/19/2008
Authors: Thomas Gerrits, Tracy S. Clement, Scott C Glancy, Sae Woo Nam, Richard P Mirin, Emanuel H Knill
Abstract: We have experimentally created and measured an optical Schrödinger Cat State. The method relies on single photon subtraction off a squeezed vacuum state and conditioning a homodyne measurement on the detection of that photon.
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33008

52. Error and Transient Analysis of Stepwise-Approximated Sinewaves Generated by Programmable Josephson Voltage Standards
Topic: Quantum Electrical Measurements
Published: 7/1/2008
Authors: Charles J Burroughs, Alain Rufenacht, Samuel Paul Benz, Paul David Dresselhaus, Bryan C Waltrip, Thomas L Nelson
Abstract: We are developing a quantum-based 60 Hz power standard that exploits the precision sinusoidal reference voltages synthesized by programmable Josephson voltage standards (PJVS). PJVS technology was chosen for this application because we need to genera ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32663

53. Systematic-Error Signals in the AC Josephson Voltage Standard: Measurement and Reduction
Topic: Quantum Electrical Measurements
Published: 6/30/2008
Authors: Regis Landim, Samuel Paul Benz, Paul David Dresselhaus, Charles J Burroughs
Abstract: We investigate the dominant frequency-dependent systematic error signals (SES) in the ac Josephson voltage standard. We describe our error measurement technique and a number of methods to reduce the errors. Most importantly we found that a small chan ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32671

54. Design of a Turn-Key 10 V Programmable Josephson Voltage Standard System
Topic: Quantum Electrical Measurements
Published: 6/13/2008
Authors: Paul David Dresselhaus, Mike Elsbury, Charles J Burroughs, David Olaya, Samuel Paul Benz, Norman F Bergren, Robert E Schwall, Zoya Popovic
Abstract: NIST is designing a 10 V Programmable Josephson Voltage Standard (PJVS) system with an improved microwave design and arrays of stacked NbXSi1-x-barrier Josephson junctions. For this new design a ?ground-up? approach, was used which takes into account ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32922

55. Improvements in the NIST Johnson Noise Thermometry System
Topic: Quantum Electrical Measurements
Published: 6/9/2008
Authors: Samuel Paul Benz, Horst Rogalla, Rod White, Jifeng Qu, Paul David Dresselhaus, Wes L Tew, Sae Woo Nam
Abstract: We have developed a Johnson noise thermometry system that is calibrated by precision waveforms synthesized with a quantum-accurate voltage noise source (QVNS). Significant improvements to the QVNS and the cross-correlation measurement electronics hav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32883

56. Precision Differential Sampling Measurements of Low-Frequency Voltages Synthesized with an AC Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/9/2008
Authors: Alain Rufenacht, Charles J Burroughs, Samuel Paul Benz, Paul David Dresselhaus, Bryan C Waltrip, Thomas L Nelson
Abstract: Sampling is a promising technique to compare the stepwise-approximated sine waves synthesized by an AC Programmable Josephson Voltage Standard to the sinusoidal voltages of a secondary source at low frequencies (a few hundred Hz or less). This paper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32900

57. Progress toward a 1V Pulse-Driven AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/9/2008
Authors: Samuel Paul Benz, Paul David Dresselhaus, Norman F Bergren, Regis Landim
Abstract: We present a new record output voltage of 275 mVrms, which is a 25% improvement over the maximum achieved with previous ac Josephson voltage standard circuits. We demonstrate operating margins for these circuits and use them to measure the harmonic d ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32869

58. Electromagnetic Airframe Penetration Measurements for the FAA Bombardier Global 5000
Series: Technical Note (NIST TN)
Report Number: 1547
Topic: Quantum Electrical Measurements
Published: 6/2/2008
Authors: Chriss A. Grosvenor, David R Novotny, Dennis G Camell, Galen H Koepke, Robert Johnk
Abstract: The National Institute of Standards and Technology has recently completed shielding effectiveness/penetration studies on three different aircraft types for the Federal Aviation Administration. The studies are used to understand the cavity coupling ch ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32942

59. Metrology Triangle Using a Watt Balance, a Calculable Capacitor, and a Single- Electron Tunneling Device
Topic: Quantum Electrical Measurements
Published: 5/16/2008
Authors: Mark W Keller, Francois PM Piquemal, Nicolas Feltin, Barthelemy Steck, Laurent Devoille
Abstract: The combination of a Watt balance, a calculable capacitor, and a single-electron tunneling device forms a triangle that yields a value for the single-electron charge quantum $Q_{\rm{S}}$ in terms of the SI coulomb. Importantly, this result is indepen ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32943

60. Comparison of Two AC Programmable Josephson Voltage Standards Using Sampling Methods
Topic: Quantum Electrical Measurements
Published: 4/21/2008
Authors: Alain Rufenacht, Charles J Burroughs, Samuel Paul Benz
Abstract: We have performed a variety of comparison measurements between ac waveforms generated by two independent ac programmable Josephson voltage standard (ACPJVS) systems. The objective of these experiments was to demonstrate the effectiveness of using a s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32826



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