141 citations · 394 across the 13 of their papers we have counts for
13 papers
Reforming the international system of units: On our way to redefine the base units solely from fundamental constants and beyond
Christian J. Bordé
Our purpose is to offer a logical analysis of the system of units and to explore possible paths towards a consistent and unified system with an original perspective. The path taken…
Accurate determination of the Boltzmann constant by Doppler spectroscopy: Towards a new definition of the kelvin
Benoît Darquié, Sinda Mejri, Papa Lat Tabara Sow +6
Accurate molecular spectroscopy in the mid-infrared region allows precision measurements of fundamental constants. For instance, measuring the linewidth of an isolated Doppler-broa…
5D relativistic atom optics and interferometry
Christian J. Bordé
This contribution is an update of a previous presentation of 5D matter- wave optics and interferometry with a correction of some algebraic errors. Electromagnetic interactions are…
Reply to the comment on: "Does an atom interferometer test the gravitational redshift at the Compton frequency?"
Peter Wolf, Luc Blanchet, Christian J. Bordé +3
Hohensee, Chu, Peters and Müller have submitted a comment (arXiv:1112.6039 [gr-qc]) on our paper "Does an atom interferometer test the gravitational redshift at the Compton frequen…
Atom interferometry and the Einstein equivalence principle
Peter Wolf, Luc Blanchet, Christian J. Bordé +3
The computation of the phase shift in a symmetric atom interferometer in the presence of a gravitational field is reviewed. The difference of action-phase integrals between the two…
The theory of quantum levitators
François Impens, Franck Pereira Dos Santos, Christian J. Bordé
We develop a unified theory for clocks and gravimeters using the interferences of multiple atomic waves put in levitation by traveling light pulses. Inspired by optical methods, we…
Progress towards an accurate determination of the Boltzmann constant by Doppler spectroscopy
Cyril Lemarchand, Meriam Triki, Benoît Darquié +3
In this paper, we present significant progress performed on an experiment dedicated to the determination of the Boltzmann constant, k, by accurately measuring the Doppler absorptio…
Determination of the Boltzmann constant by laser spectroscopy as a basis for future measurements of the thermodynamic temperature
Cyril Lemarchand, Khelifa Djerroud, Benoît Darquié +6
In this paper, we present the latest results on the measurement of the Boltzmann constant kB, by laser spectroscopy of ammonia at 10 ?m. The Doppler absorption profile of a ro-vibr…
Measurement of the Boltzmann constant by the Doppler broadening technique at a 3,8x10-5 accuracy level
Khelifa Djerroud, Cyril Lemarchand, Alexandre Gauguet +7
In this paper, we describe an experiment performed at the Laboratoire de Physique des Lasers and dedicated to an optical measurement of the Boltzmann constant. With the proposed in…
Space-time sensors using multiple-wave atom levitation
F. Impens, Ch. J. Bordé
The best clocks to date control the atomic motion by trapping the sample in an optical lattice and then interrogate the atomic transition by shining on these atoms a distinct laser…
First direct determination of the Boltzmann constant by an optical method
Christophe Daussy, Mickael Guinet, Anne Amy-Klein +5
We have recorded the Doppler profile of a well-isolated rovibrational line in the \nu2 band of 14NH3. Ammonia gas was placed in an absorption cell thermalized by a water-ice bath.…
Testing the Dirac equation
Claus Lämmerzahl, Christian J. Bordé
The dynamical equations which are basic for the description of the dynamics of quantum felds in arbitrary space--time geometries, can be derived from the requirements of a unique d…
Relativistic phase shifts for Dirac particles interacting with weak gravitational fields in matter-wave interferometers
Christian J. Bordé, Jean-Claude Houard, Alain Karasiewicz
We present a second-quantized field theory of massive spin one-half particles or antiparticles in the presence of a weak gravitational field treated as a spin two external field in…