Light speed reduction to 17 metres per second in an ultracold atomic gas

  title={Light speed reduction to 17 metres per second in an ultracold atomic gas},
  author={Lene Vestergaard Hau and Sarah E. Harris and Zachary Dutton and Cyrus H Behroozi},
Techniques that use quantum interference effects are being actively investigated to manipulate the optical properties of quantum systems. One such example is electromagnetically induced transparency, a quantum effect that permits the propagation of light pulses through an otherwise opaque medium. Here we report an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than… 
Observation of coherent optical information storage in an atomic medium using halted light pulses
A theoretical model is presented that reveals that the system is self-adjusting to minimize dissipative loss during the ‘read’ and ‘write’ operations, anticipating applications of this phenomenon for quantum information processing.
Electromagnetically induced transparency with resonant nuclei in a cavity
Electromagnetically induced transparency in the regime of hard X-rays is demonstrated, using the 14.4-kiloelectronvolt nuclear resonance of the Mössbauer isotope iron-57 (a two-level system), to establish the field of nuclear quantum optics.
Electromagnetically induced transparency and slow light in quantum degenerate atomic gases
We systematically investigate the electromagnetically induced transparency (EIT) and slow light properties in ultracold Bose and Fermi gases. It shows a very different property from the classical
Slow Light, Stopped Light and Guided Light in Hot Rubidium Vapor Using Off-resonant Interactions
This thesis presents the applications of some of the coherent processes in a three-level atomic system, to control spatial and temporal properties of a signal pulse. We use two Raman absorption
Electromagnetically induced transparency with tunable single-photon pulses
This work demonstrates the use of EIT for the controllable generation, transmission and storage of single photons with tunable frequency, timing and bandwidth and probes the spectral and quantum statistical properties of narrow-bandwidth single-photon pulses, revealing that their quantum nature is preserved under EIT propagation and storage.
PAGE The recent prospect of efficient, reliable, and secure quantum communication relies on the ability to coherently and reversibly map nonclassical states of light onto long-lived atomic states. A
A Stern–Gerlach experiment for slow light
Electromagnetically induced transparency allows light transmission through dense atomic media by means of quantum interference1. Media with electromagnetically induced transparency have very
Experimental observation of subluminal light carrying orbital angular momentum in vacuum
Einstein's theory of relativity establishes the speed of light in vacuum, c, as a fundamental constant. However, in optically dense media, light can be made to travel at speeds lower than c, e.g.
Electromagnetically Induced Transparency with NMR
Electromagnetically Induced Transparency (EIT) is a quantum nonlinear optical interference effect in which light at a certain frequency makes normally opaque atomic systems transparent to light at
Vacuum-Induced Transparency
It is found that the transmission of light through a medium may be controlled with few photons and even by the electromagnetic vacuum field, which provides prospects for advanced quantum devices such as photon number–state filters.


Electromagnetically induced transparency: Propagation dynamics.
The first experimental studies of the temporal dynamics and spatial behavior of propagating EIT pulses are reported, including the observation of nearly diffractionlimited beam transmission in a medium which, without the coupling laser present, is nearly optically impenetrable.
Near-Resonant Spatial Images of Confined Bose-Einstein Condensates in a 4-Dee Magnetic Bottle
We present quantitative measurements of the spatial density profile of Bose-Einstein condensates of sodium atoms confined in a 4-Dee magnetic bottle. The condensates are imaged in transmission with
Manipulating atoms with photons
By using quasi-resonant exchanges of energy, linear and angular momentum between atoms and photons, it is possible to polarize atoms, to displace their energy levels and to control their position and
Coherent population transfer among quantum states of atoms and molecules
The authors discuss the technique of stimulated Raman adiabatic passage (STIRAP), a method of using partially overlapping pulses (from pump and Stokes lasers) to produce complete population transfer
Electromagnetically Induced Transparency
  • S. Harris
  • Physics
    QELS '97., Summaries of Papers Presented at the Quantum Electronics and Laser Science Conference
  • 1997
Electromagnetically induced transparency (EIT) is a technique for making an otherwise optically-thick medium transparent to laser radiation.’ The basic idea is to use two lasers or electromagnetic
Cold atoms: A new medium for quantum optics
Laser-cooled and trapped cesium atoms have been used as a nonlinear medium in a nearly resonant cavity. A study of the semiclassical dynamics of the system was performed, showing bistability and
Dispersive properties of electromagnetically induced transparency.
  • Harris, Field, Kasapi
  • Physics
    Physical review. A, Atomic, molecular, and optical physics
  • 1992
An atomic transition that has been made transparent by applying an additional electromagnetic field exhibits a rapidly varying refractive index with zero group velocity dispersion at line center. A
A new atomic beam source: The "candlestick"
The design of a novel‐type of atomic beam source which provides for long term, stable operation at high emission rates is reported. The heart of the design is the ‘‘candlestick’’ where liquid source
Bose-Einstein Condensation in a Gas of Sodium Atoms
The striking signature of Bose condensation was the sudden appearance of a bimodal velocity distribution below the critical temperature of ~2µK.