an experiment for the measurement of the dynamical Casimir effect

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Detection schemeN pulsesSteps5. Look for signal with τ ~ Q / 2πν r1. Find cavity frequency ν r2. Wait for empty cavity3. Set laser system to 2 ν r4. Send burst with > 1000 pulsest p= 1/ 2 ν rCharged cavity.Will decay with itstime constantExpected number of photons:Niobium cavity with TE 101 ν r = 2.5 GHz (22 x 71 x 110 mm 3 )Semiconductor GaAs with thickness δx = 0.6 mmSingle run with ~ 5000 pulsesN ≥ 10 4 photonsGiuseppe Ruoso - Les Houches - June 9, 2005
Check listSeveral things can be employed to disentangle a real signal from aspurious oneSignal (a.u.)Change temperature of cavityEffect on black body photonsChange laser pulse rep. frequency1.61.41.210.80.60.85 0.9 0.95 1 1.05 1.1Laser pulse frequency (a.u)Loading of cavity with real photons (isour system a microwave amplifier?)Power inside cavity at end of laser pulses (a.u.)14121086420Determine vacuum effect from severalmeasurements with pre-loaded cavity0 1 2 3 4 5 6Power inside cavity at t = t0 (a.u.)-change recombination time of semiconductor-change width of semiconductor layerGiuseppe Ruoso - Les Houches - June 9, 2005
Page 9 and 10: Surface mechanical motionStrong lim
Page 11 and 12: Surface effective motionVan der Wal
Page 13 and 14: MIR - the experimental schemeA semi
Page 15 and 16: Semiconductor as a reflectorReflect
Page 17 and 18: Cavity with semiconductor wallCompu
Page 19 and 20: Detection electronics 2• Performe
Page 21 and 22: Detailed set-upWorking temperature4
Page 23: Giuseppe Ruoso - Les Houches - June

an experiment for the measurement of the dynamical Casimir effect

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