Publications
267 results found
Hinds EA, Lai KS, 1998, Blackbody Excitation of an Atom Controlled by a Tunable Cavity, Physical Review Letters, ISSN: 0031-9007
Hinds EA, Boshier MG, Hughes IG, 1998, A Magnetic Waveguide for Trapping Cold Atom Gases in 2D, Physical Review Letters, ISSN: 0031-9007
Hinds EA, Lai KS, Schnell M, 1997, Atoms in micron-sized metallic and dielectric waveguides, Philosophical Transactions A: Mathematical, Physical and Engineering Sciences, ISSN: 1364-503X
Hughes IG, Barton PA, Boshier MG, et al., 1997, Cold atom reflection from curved magnetic mirrors, Pages: 182-190, ISSN: 0277-786X
Multiple bounces of cold rubidium atoms have been observed for times up to one second in a trap formed by gravity and a 2 cm-diameter spherical mirror made from a sinusoidally magnetized floppy disk. We have studied the dynamics of the atoms bouncing in this trap from several different heights up to 40.5 mm and we conclude that the atoms are reflected specularly and with reflectivity 1.01(3). Slight roughness of the mirror is caused by harmonics in the magnetization of the surface and by discontinuities at the boundaries between recorded tracks. As the next step in this atom optics program we propose using a magnetic mirror to create a 2D atomic gas. We discuss how cold atoms can be loaded into the ground state of a static magnetic potential well that exists above the surface of the mirror as a consequence of the intermediate-field Zeeman effect. ©2004 Copyright SPIE - The International Society for Optical Engineering.
Hinds ED, Sauer B, 1997, Electron dipole moments, PHYSICS WORLD, Vol: 10, Pages: 37-40, ISSN: 0953-8585
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Hinds EA, Sauer BE, Wang J, 1996, Laser‐rf double resonance spectroscopy of 174YbF in the X 2Σ+ state: Spin‐rotation, hyperfine interactions, and the electric dipole moment, Journal of Chemical Physics, ISSN: 0021-9606
Hinds EA, Sandoghdar V, Sukenik CI, et al., 1996, Spectroscopy of atoms confined to the single node of a standing wave in a parallel-plate cavity, Physical Review A, ISSN: 1050-2947
Berkeland DJ, Hinds EA, Boshier MG, 1996, Precise laser spectroscopy of hydrogen and singly-ionized helium, Pages: 172-173, ISSN: 0589-1485
We have measured the hydrogen 1S Lamb shift to be 8,172,827(51) kHz, the most precise value for any Lamb shift. The result is in reasonable agreement with the predictions of quantum electrodynamics (QED), although its interpretation as a test of QED is limited by the uncertainty in the proton charge radius. A measurement of the He+(2S) Lamb shift by laser spectroscopy can bypass this limitation and investigate a nine standard deviation discrepancy between theory and experiment for this Lamb shift.
Hinds EA, Berkelend DJ, Boshier MG, 1995, Precise Optical Measurement of Lamb Shifts in Atomic Hydrogen, Physical Review Letters, ISSN: 0031-9007
Hinds EA, Sangster K, Barnett SM, et al., 1995, Aharonov-Casher phase in an atomic system, Physical Review A, ISSN: 1050-2947
Hinds EA, Sauer BE, Wang J, 1995, Anomalous Spin-Rotation Coupling in the X^2Σ+ State of YbF, Physical Review Letters, ISSN: 0031-9007
Roach TM, Abele H, Boshier MG, et al., 1995, Realization of a magnetic mirror for cold atoms, Physical Review Letters, Vol: 75, Pages: 629-632, ISSN: 0031-9007
We have demonstrated that cold atoms can be retroflected from a ferromagnetic surface by the Stern-Gerlach effect. When the surface is magnetized periodically, the reflectivity for suitably polarized atoms is (948)% and the reflection is specular. A demagnetized surface is also highly reflecting but the reflections are diffuse. These magnetic processes are of interest for atom optics because they permit the manipulation of cold atoms without the use of laser beams. In our experiments, Rb atoms released from a magneto-optic trap (MOT) fall under gravity until they are reflected, after which they are recaptured in the MOT. Multiple bounces of these atoms have been studied for times up to 600 ms. © 1995 The American Physical Society.
Berkeland DJ, Hinds EA, Boshier MG, 1994, Measurement of the hydrogen 1S lamb shift
This paper is reports about the measuring of the Lamb shift of the 1st hydrogen ground state as a test of quantum electrodynamics using Doppler-free two photon absorption. Mid-way of the experiment, the 1S-2S transition with high resolution was observed. Presently, the statistical uncertainty of Lamb shift measurement is less than 10 ppm, comparable to the Lamb shift measurement in any system.
Sauer BE, Hinds EA, Wang J, 1994, YbF - a new way to measure the electron electric dipole moment
Heavy diatomic 2Σ or 2Π molecules were considered to be spectaculary sensitive systems to search for a permanent electric dipole moment (EDM) of the electron. To devise a molecular beam experiment using this kind of molecule, a variety of candidate molecules were considered. The YbF compound was chosen at the molecular beam and the production and detection methods for the molecules were studied. Several chemical mixtures were utilized to measure YbF production efficiency. Using both the hot wire and laser induced fluorescence, YbF was detected. Narrow linewidth of the crossed laser molecular beam apparatus was utilized to determine the spin-rotation and hyperfine splitting constants of the YbF molecule.
Hinds EA, Sangster K, Barnett SM, et al., 1993, Measurement of the Aharonov-Casher Phase in an Atomic System, Physical Review Letters, ISSN: 0031-9007
Hinds EA, Sukenik CI, Boshier MG, et al., 1993, Measurement of the Casimir-Polder Force, Physical Review Letters, ISSN: 0031-9007
Hinds EA, Sandoghdar V, Sukenik C, et al., 1992, Direct Measurement of the van der Waals Interaction between an Atom and a Micron-Sized Cavity, Physical Review Letters, ISSN: 0031-9007
Boshier MG, Berkeland D, Hinds EA, et al., 1991, External-cavity frequency-stabilization of visible and infrared semiconductor lasers for high resolution spectroscopy, Optics Communications, Vol: 85, Pages: 355-359, ISSN: 0030-4018
We have shown that the external cavity stabilization can be a straightforward and powerful technique for converting diode lasers of poor spectral quality into useful tools for high precision laser spectroscopy. The method requires an anti-reflection coating on one facet of the diode laser but, contrary to popular belief, this is not difficult and does not require any specialized equipment. We describe a coating procedure which can be used with standard commercial diode lasers. We have demonstrated the external cavity method using diodes at a variety of visible and infrared wavelengths. Details are given for a visible laser centered at 670 nm. © 1991.
Cho D, Sangster K, Hinds EA, 1991, Search for time-reversal-symmetry violation in thallium fluoride using a jet source, Physical Review A, Vol: 44, Pages: 2783-2799, ISSN: 1050-2947
We have looked for a violation of time-reversal symmetry (T) in the molecule thallium fluoride using a rotationally cold beam from a jet source. Our method was to search for a frequency shift of the thallium nuclear magnetic resonance when an external electric field of 29.5 kV/cm was reversed with respect to a magnetic quantization axis. The measured shift, (1.42.4)×10-4 Hz, was interpreted as a null result and constitutes a tenfold improvement in sensitivity over the previous measurement. Accordingly, our measurement has reduced the upper limits on the proton and electron electric dipole moments and on other T-violating weak couplings that can be deduced from the frequency shift. © 1991 The American Physical Society.
Hinds EA, Sandoghdar V, 1991, Cavity QED level shifts of simple atoms, Physical Review A, ISSN: 1050-2947
Sukenik CI, Boshier MG, Haroche S, et al., 1990, Optical channeling and laser spectroscopy within a microcavity
A study of the radiative properties of atoms confined within micron-sized cavities is reported. An experiment undertaken to observe directly by spectroscopy London-van der Waals energy-level shifts, which are closely related to the strong suppression of spontaneous decay from an excited state, is described. This requires that the atoms be confined to a small region compared with the dimensions of the cavity. A technique for obtaining a hypercollimated beam is described. Direct spectroscopy of the level shifts in the confined atoms due to the walls of the cavity is under way.
Boshier MG, Hinds EA, SanDoghdar V, 1990, Single frequency, narrow linewidth operation of a 670-nm visible diode laser in an external cavity
A recently developed method for reducing the linewidth of diode lasers by using weak feedback from a resonant reflector has found wide use because it does not require any modification of the diode laser, but it cannot be used with diode lasers which operate multimode in the absence of feedback. The authors demonstrated that an alternative technique of operating the diode with strong feedback from a frequency selective external cavity does result in single-mode narrow-band output from the gain-guided 670-nm diode lasers. To ensure that the external cavity controls the spectral properties of the laser, it is necessary to put an antireflection coating on the output facet of the diode. Although it may be possible to reduce the linewidth of these diodes using the resonant optical reflector method, the external cavity scheme seems preferable for many applications because of the ease with which the laser can be tuned to a required wavelength.
Cho D, Sangster K, Hinds EA, 1990, New limits on time reversal symmetry violation in thallium fluoride
Recent results in the search for a T-violating hyperfine interaction of the spin-1/2 thallium nucleus in the molecule thallium fluoride (TIF) are reported. The interaction is of interest because it violates both parity and time reversal invariance and is of a rather general form. To detect the interaction, the hyperfine magnetic resonance frequency of the T1 nucleus (due principally to the spin-rotation coupling) was observed in the presence of strong external electric field E. A tenfold improvement over previous results was obtained, placing new constraints on the electric dipole moment (EDM) of the proton, the EDM of the electron, the T-violating tensor coupling strength of the weak interaction, and the Schiff moment of the T1 nucleus.
Hinds EA, 1990, Cavity Quantum Electrod Ynamics, Advances in Atomic, Molecular and Optical Physics, Vol: 28, Pages: 237-289, ISSN: 1049-250X
This chapter focuses on cavity quantum electrodynamics. It presents the modifications of the spontaneous radiation rate in a cavity and the shifts of energy levels. The chapter focuses on experimental work, with an outline of a theoretical framework in which the experiments may be understood. In the laboratory, the study of atoms in cavities is a relatively young field in which much of the effort is still aimed at elucidating the basic physical principles at work and demonstrating the elementary modifications of energies and the rates of an atom in a cavity. However, the ability to adjust the electromagnetic spectrum of the vacuum is leading into a remarkable new domain of quantum physics in which atoms can decay from the ground state to an excited state, radiative corrections can be far larger than fine structure, and electromagnetic fields can be prepared with an exact number of photons. This realm of physics is now known as “cavity quantum electrodynamics. © 1991 Academic Press Inc.
Meschede D, Jhe W, Hinds EA, 1990, Radiative properties of atoms near a conducting plane: An old problem in a new light, Physical Review A, Vol: 41, Pages: 1587-1596, ISSN: 1050-2947
We examine the level shifts and radiation rates of an atom near an infinite, perfectly conducting plane. Following the work of Dalibard, Dupont-Roc, and Cohen-Tannoudji [J. Phys. (Paris) 43, 1617 (1982); 45, 637 (1984)], we distinguish between the effects of radiation reaction and vacuum fluctuation. This separation provides some new physical insight into the nature of cavity modifications of atomic properties. In particular, we are able to identify the Casimir interaction as entirely due to the vacuum fluctuations. © 1990 The American Physical Society.
Hinds EA, Cho D, Sangster K, 1989, Tenfold improvement of limits on T violation in thallium fluoride, Physical Review A, ISSN: 1050-2947
Cho D, Hinds EA, 1989, NEW LIMITS ON T-VIOLATION: FIRST RESULTS FROM A SUPERSONIC TIF BEAM
The first results in our search for T-violation using a supersonic jet beam ofTlF have allowed us to improve on previous limitsby a factor offour and impose new constraints on fundamental T-violation.
Boshier MG, Baird PEG, Foot CJ, et al., 1989, Laser spectroscopy of the 1S-2S transition in hydrogen and deuterium: Determination of the 1S Lamb shift and the Rydberg constant, Physical Review A, Vol: 40, Pages: 6169-6184, ISSN: 1050-2947
We have observed the narrow 1S-2S transition in hydrogen and deuterium with high resolution using Doppler-free two-photon absorption of continuous-wave 243-nm light. The transition frequencies were measured by direct comparison with accurately calibrated lines in the spectrum of the Te2130 molecule. We find the 1S-2S interval to be 2 466 061 414.1(8) MHz in hydrogen and 2 466 732 408.5(7) MHz in deuterium. By combining these results with recent measurements of the Rydberg constant we obtain the values 8172.6(7) and 8183.7(6) MHz for the 1S Lamb shifts in hydrogen and deuterium, respectively. These are the most precise measurements of the 1S Lamb shifts in these atoms and they are in excellent agreement with the theoretical values of 8173.03(9) and 8184.08(12) MHz. Alternatively, if the 1S Lamb shift is supposed known from theory, our measurements determine the Rydberg constant as R=109 737.315 73(3) cm-1. © 1989 The American Physical Society.
Tate DA, Baird PEG, Boshier MG, et al., 1988, Fine structure and isotope shift of tritium in the Balmer-α transition, Journal of Physics B: Atomic, Molecular and Optical Physics, Vol: 21, Pages: 421-430, ISSN: 0953-4075
By means of saturated absorption spectroscopy in a discharge tube containing hydrogen isotopes, fine-structure intervals in the Balmer- alpha line of tritium have been measured, and for each of four components of that line the tritium-hydrogen and tritium-deuterium isotope shifts have been measured. The results agree with theory within the experimental limits of error, which are typically +or-2 MHz. The profiles of the components of Balmer- alpha have been analysed in detail and in particular a Stark-induced crossover signal has been revealed.
Hinds EA, Anderson A, Haroche S, et al., 1988, Measuring the van der Waals forces between a Rydberg atom and a metallic surface, Physical Review A, ISSN: 1050-2947
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