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Journal articleKIM MS, KNIGHT PL, 1987,
QUANTUM-JUMP TELEGRAPH NOISE AND MACROSCOPIC INTENSITY FLUCTUATIONS
, PHYSICAL REVIEW A, Vol: 36, Pages: 5265-5270, ISSN: 1050-2947- Author Web Link
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- Citations: 36
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Journal articleGill P, Thompson RC, 1987,
The preparation and analysis of iodine cells
, Metrologia, Vol: 23, Pages: 161-166, ISSN: 0026-1394The procedure used at NPL for the routine filling of iodine cells is described, along with standard methods employed for the verification of the cells. Results show that a small proportion of the cells filled have significant contamination present. Detailed spectral analysis of these cells identifies the contaminants as primarily N2 and CO. It is also shown that contaminated cells can be temporarily improved by an extended period of radio-frequency discharge.
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Journal articleHinds EA, Alhassid Y, Meschede D, 1987,
Dynamical Symmetries of the Perturbed Hydrogen Atom: The van der Waals Interaction
, Physical Review Letters, ISSN: 0031-9007 -
Journal articleDEOLIVEIRA FAM, DALTON BJ, KNIGHT PL, 1987,
SQUEEZING AND TRAPPING IN 3-LEVEL ATOMS
, JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, Vol: 4, Pages: 1558-1564, ISSN: 0740-3224- Author Web Link
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- Citations: 28
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Journal articleCODLING K, FRASINSKI LJ, HATHERLY P, et al., 1987,
ON THE MAJOR-MODE OF MULTIPHOTON MULTIPLE IONIZATION
, JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, Vol: 20, Pages: L525-L531, ISSN: 0953-4075- Author Web Link
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- Citations: 41
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Journal articleKIM MS, KNIGHT PL, WODKIEWICZ K, 1987,
CORRELATIONS BETWEEN SUCCESSIVELY EMITTED PHOTONS IN RESONANCE FLUORESCENCE
, OPTICS COMMUNICATIONS, Vol: 62, Pages: 385-388, ISSN: 0030-4018- Author Web Link
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- Citations: 30
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Journal articleFRASINSKI LJ, CODLING K, HATHERLY P, et al., 1987,
FEMTOSECOND DYNAMICS OF MULTIELECTRON DISSOCIATIVE IONIZATION BY USE OF PICOSECOND LASER
, PHYSICAL REVIEW LETTERS, Vol: 58, Pages: 2424-2427, ISSN: 0031-9007- Author Web Link
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- Citations: 221
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Journal articleLOUDON R, KNIGHT PL, 1987,
SQUEEZED LIGHT
, JOURNAL OF MODERN OPTICS, Vol: 34, Pages: 709-759, ISSN: 0950-0340- Author Web Link
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- Citations: 1566
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Journal articleBARNETT SM, KNIGHT PL, 1987,
SQUEEZING IN CORRELATED QUANTUM-SYSTEMS
, JOURNAL OF MODERN OPTICS, Vol: 34, Pages: 841-853, ISSN: 0950-0340- Author Web Link
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- Citations: 102
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Journal articleGOMES ASL, GOUVEIANETO AS, FRENCH PMW, et al., 1987,
OPTICAL PULSE-COMPRESSION OF RAMAN-DEPLETED PICOSECOND PULSES AND SPECTRALLY WINDOWED SELF-PHASE MODULATED PULSES AT 1.06-MU-M
, IEE PROCEEDINGS-J OPTOELECTRONICS, Vol: 134, Pages: 171-179, ISSN: 0267-3932 -
Journal articleRADMORE PM, TARZI S, KNIGHT PL, 1987,
RATES AND RECURRENCES IN QUASI-CONTINUUM PHOTOEXCITATION
, JOURNAL OF MODERN OPTICS, Vol: 34, Pages: 587-606, ISSN: 0950-0340- Author Web Link
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- Citations: 17
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Journal articleWODKIEWICZ K, KNIGHT PL, BUCKLE SJ, et al., 1987,
SQUEEZING AND SUPERPOSITION STATES
, PHYSICAL REVIEW A, Vol: 35, Pages: 2567-2577, ISSN: 1050-2947- Author Web Link
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- Citations: 249
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Journal articleREMPE G, WALTHER H, KLEIN N, 1987,
OBSERVATION OF QUANTUM COLLAPSE AND REVIVAL IN A ONE-ATOM MASER
, PHYSICAL REVIEW LETTERS, Vol: 58, Pages: 353-356, ISSN: 0031-9007- Author Web Link
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- Citations: 1296
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Journal articleBoshier MG, Baird PEG, Foot CJ, et al., 1987,
Precision spectroscopy of hydrogen and deuterium
, Nature, Vol: 330, Pages: 463-465, ISSN: 0028-0836The hydrogen atom is an important testing ground for fundamental physical theory, because it is the simplest stable atomic system and its properties can be calculated to enormous precision. Measurements on hydrogen played a major role in the development of quantum electrodynamics (QED), a theory of electromagnetic interactions which includes quantization of the radiation field1,2. Tests of QED in hydrogen involve precision measurements of transition frequencies; the transition generally studied is between two excited states (2s2S1/2 and 2p2P1/2). Much higher precision is possible if a transition involving the ground state is studied, but this potential has not so far been exploited because of experimental difficulties. We have now carried out an experiment of this type which has given preliminary results and opens new possibilities for precision tests of QED in the future. © 1987 Nature Publishing Group.
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Conference paperAnderson A, Haroche S, Hinds EA, et al., 1987,
ATOMIC PHYSICS EXPERIMENTS IN MICRON-SIZED CAVITIES: SUPPRESSING SPONTANEOUS DECAY AT OPTICAL FREQUENCY.
Spontaneous emission from an excited atomic state reflects the properties of the surrounding vacuum field. By placing the atom near a metallic surface or in a cavity, one can modify the spectral density of the vacuum modes coupled to it and either enhance or inhibit spontaneous emission. The spontaneous emission from substates of the 5D//5/////2 level of cesium at 3. 49 mu m has been suppressed by passing the atom between two gold mirrors separated by a 1. 1- mu m gap. The atoms travel in the gap for about 13 natural lifetimes without radiating. Substates with maximum angular momentum normal to the mirrors have their emission turned off. Other substates have their radiation rate either decreased or increased by a factor of between 0. 4 and 1. 3. A magnetic field making an angle with the direction normal to the mirrors was used to study the dependence of the spontaneous emission rates on the polarization of the excited atoms in the gap, enabling the anisotropy of the vacuum-field fluctuations between the two closely spaced mirrors to be checked. The deflection of cesium Rydberg atoms attracted to a metallic surface by the dipole image van der Waals force was also observed.
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Journal articleJhe W, Anderson A, Hinds EA, et al., 1987,
Suppression of spontaneous decay at optical frequencies: Test of vacuum-field anisotropy in confined space
, Physical Review Letters, Vol: 58, Pages: 666-669, ISSN: 0031-9007The radiative decay of Cs atoms excited into the 5D5/2 level and passing between two metallic mirrors spaced by a 1.1-m gap is observed to depend upon their angular momentum. Spontaneous emission at a wavelength of 3.49 m is suppressed for the substates with maximum angular momentum normal to the mirrors, which survive without substantial decay during 13 natural lifetimes. The radiation rate is modified by application of a magnetic field which mixes sublevels having lifetimes in the gap. This experiment illustrates the anisotropy of the vacuum field in confined space. © 1987 The American Physical Society.
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Conference paperSchropp D, Cho D, Vold T, et al., 1987,
NEW EXPERIMENTAL LIMITS ON P AND T VIOLATION.
, Pages: 16-17The first results are announced from a molecular beam experiment on the polar molecule TIF, searching for a P and T violating interaction of the general form H//e//f//f equals d sigma multiplied by lambda , where sigma is a unit angular momentum, lambda is a unit polar vector, and d characterizes the strength of the interaction. In this case sigma and lambda lie along the TI nuclear spin direction and the internuclear axis, respectively. An external electric field E is applied along the sigma direction to polarize the molecule so that sigma multiplied by lambda does not equal 0. So far, the experiment has yielded a null result with substantially smaller uncertainty than any previous work. Interpretation of the limit on d leads to limits on the possible values of the proton electric dipole moment the thallium nuclear electric dipole moment, and the weak electron-nucleon tensor coupling C// tau .
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Journal articleSchropp D, Cho D, Vold T, et al., 1987,
New limits on time-reversal invariance from the hyperfine structure of thallium fluoride
, Physical Review Letters, Vol: 59, Pages: 991-994, ISSN: 0031-9007We have made a very precise test of time-reversal invariance using nuclear-spin resonance in a thallium fluoride molecular beam. We searched for a shift of the 120-kHz Tl resonance when an external electric field was reversed relative to the nuclear spin and found it to be (-2.2±2.1)×10-3 Hz, less than 0.02 ppm and a fivefold improvement over any previous measurement. Our result imposes new constraints on the proton electric dipole moment and on CP nonconservation in strong and weak interactions. © 1987 The American Physical Society.
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Journal articleFRASINSKI LJ, STANKIEWICZ M, RANDALL KJ, et al., 1986,
Dissociative photoionisation of molecules probed by triple coincidence; double time-of-flight techniques
, Journal of Physics B - Atomic Molecular and Optical Physics, Vol: 19, Pages: L819-L824, ISSN: 0953-4075Two novel experiments producing three-dimensional histograms of time-of-flight correlations have recently been performed at the Daresbury Synchrotron Radiation Source. In the first, the two photoions from the double ionisation of SF, were detected; in the second, the photoelectron and the O+ ion from the predissociation of 0:. This technique allows a visual insight into the details of dissociative photoionisation which has not beenavailable previously.
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Journal articlePATEL ZG, NAIK AG, PATEL CL, et al., 1986,
EFFECT OF TIME OF NITROGEN APPLICATION ON THE YIELD OF LOW LAND PADDY UNDER SOUTH GUJARAT CONDITIONS
, INDIAN JOURNAL OF AGRONOMY, Vol: 31, Pages: 396-397, ISSN: 0537-197X -
Journal articlePATEL CL, PATEL ZG, PATEL RB, et al., 1986,
CHEMICAL WEED-CONTROL IN ONION BULB CROP
, INDIAN JOURNAL OF AGRONOMY, Vol: 31, Pages: 414-415, ISSN: 0537-197X -
Journal articleGOMES ASL, GOUVEIANETO AS, TAYLOR JR, et al., 1986,
OPTICAL PULSE NARROWING BY THE SPECTRAL WINDOWING OF SELF-PHASE MODULATED PICOSECOND PULSES
, OPTICS COMMUNICATIONS, Vol: 59, Pages: 399-404, ISSN: 0030-4018- Author Web Link
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- Citations: 17
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Journal articleLAUDER MA, KNIGHT PL, GREENLAND PT, 1986,
PULSE-SHAPE EFFECTS IN INTENSE-FIELD LASER EXCITATION OF ATOMS
, OPTICA ACTA, Vol: 33, Pages: 1231-1252, ISSN: 0030-3909- Author Web Link
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- Citations: 27
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Journal articleLOVE DJ, NEW GHC, LAUDER MA, 1986,
BEAM PROPAGATION ANALYSIS OF A NONLINEAR DUAL-CHANNEL DIRECTIONAL COUPLER
, OPTICS COMMUNICATIONS, Vol: 59, Pages: 177-182, ISSN: 0030-4018- Author Web Link
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- Citations: 5
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Journal articlePATEL MP, DUNGARANI RA, PATEL HC, et al., 1986,
RESPONSE OF GROUNDNUT CULTIVARS TO DIFFERENT DATES OF SOWING UNDER RAIN-FED CONDITIONS
, INDIAN JOURNAL OF AGRONOMY, Vol: 31, Pages: 285-288, ISSN: 0537-197X -
Journal articleCATHERALL JM, NEW GHC, 1986,
ROLE OF SPONTANEOUS EMISSION IN THE DYNAMICS OF MODE-LOCKING BY SYNCHRONOUS PUMPING
, IEEE JOURNAL OF QUANTUM ELECTRONICS, Vol: 22, Pages: 1593-1599, ISSN: 0018-9197- Author Web Link
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- Citations: 61
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Journal articleBUCKLE SJ, BARNETT SM, KNIGHT PL, et al., 1986,
ATOMIC INTERFEROMETERS - PHASE-DEPENDENCE IN MULTILEVEL ATOMIC TRANSITIONS
, OPTICA ACTA, Vol: 33, Pages: 1129-1140, ISSN: 0030-3909- Author Web Link
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- Citations: 111
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Conference paperCATHERALL JM, NEW GHC, 1986,
ROLE OF SPONTANEOUS EMISSION IN THE DYNAMICS OF MODE-LOCKING BY SYNCHRONOUS PUMPING
, Publisher: OPTICAL SOC AMER, Pages: P28-P29, ISSN: 0740-3224 -
Journal articleZENTENO LA, AVRAMOPOULOS H, NEW GHC, 1986,
DETAILED ANALYSIS OF ACTIVE MODE-LOCKING
, APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY, Vol: 40, Pages: 141-146, ISSN: 0721-7269- Author Web Link
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- Citations: 16
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Journal articleAGARWAL GS, COOPER J, HAAN SL, et al., 1986,
ISOMORPHISM OF DC-FIELD-INDUCED INTERFERENCE AND LASER-INDUCED EFFECTS IN AUTOIONIZATION
, PHYSICAL REVIEW LETTERS, Vol: 56, Pages: 2586-2589, ISSN: 0031-9007- Author Web Link
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- Citations: 13
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