aqora

Manipulation and storage of optical field and atomic ensemble quantum states

Aurélien Dantan, Alberto Bramati, M. Pinard +1 more

We study how to efficiently manipulate and store quantum information between optical fields and atomic ensembles. We show how various non-dissipative transfer schemes can be used to transfer and store quantum states such as squeezed vacuum states or entangled states into the long-lived ground state spins of atomic ensembles.

arXiv:quant-ph/0407238Jul 28, 20043 citations

Manipulation of individual atoms for quantum information

Antoine Browaeys

Mar 30, 20090 citations

Quantum computation with atomic ensembles

Tommaso Calarco

Bulletin of the American Physical SocietyMar 19, 20130 citations

Quantum information with atomic ensembles

P. Zoller

We summarize our recent work on quantum information with atomic ensembles. In particular, we describe techniques for storing and manipulating quantum information in collective states of mesoscopic ensembles. Quantum information processing is is accomplished by optical excitation into states with strong dipole-dipole interactions. The resulting “dipole blockade” can be used to inhibit transitions into all but singly excited collective states. This can be employed for a controlled generation of collective atomic spin states as well as non-classical photonic states and for scalable quantum logic gates. Furthermore, we present schemes for entangling a very large number of atoms of a spinor 1 Bose Einstein condensate based on collisional interaction between atoms. As a final example, we discuss the possiblilty of creating entangled atomic states of a few bosonic atoms in a setup which mimics a “fractional quantum Hall effect” and allows the manipulation of anyonic excitations.We summarize our recent work on quantum information with atomic ensembles. In particular, we describe techniques for storing and manipulating quantum information in collective states of mesoscopic ensembles. Quantum information processing is is accomplished by optical excitation into states with strong dipole-dipole interactions. The resulting “dipole blockade” can be used to inhibit transitions into all but singly excited collective states. This can be employed for a controlled generation of collective atomic spin states as well as non-classical photonic states and for scalable quantum logic gates. Furthermore, we present schemes for entangling a very large number of atoms of a spinor 1 Bose Einstein condensate based on collisional interaction between atoms. As a final example, we discuss the possiblilty of creating entangled atomic states of a few bosonic atoms in a setup which mimics a “fractional quantum Hall effect” and allows the manipulation of anyonic excitations.

Optical Fiber Communication ConferenceJan 1, 20010 citations

Colloquium: Trapping and manipulating photon states in atomic ensembles

Mikhail D. Lukin

Modern optical techniques allow one to accurately control light using atoms and to manipulate atoms using light. In this Colloquium the author reviews several ideas indicating how such techniques can be used for accurate manipulation of quantum states of atomic ensembles and photons. First a technique is discussed that allows one to transfer quantum states between light fields and metastable states of matter. The technique is based on trapping quantum states of photons in coherently driven atomic media, in which the group velocity is adiabatically reduced to zero. Next, possible mechanisms are outlined for manipulating quantum states of atomic ensembles. Specifically, a ``dipole blockade'' technique is considered in which optical excitation of mesoscopic samples into Rydberg states can be used to control the state of ensembles at the level of individual quanta. It is also noted that even simple processes involving atom-photon correlations can be used to effectively manipulate the ensemble states. Potentially these techniques can be used for implementation of important concepts from quantum information science.Modern optical techniques allow one to accurately control light using atoms and to manipulate atoms using light. In this Colloquium the author reviews several ideas indicating how such techniques can be used for accurate manipulation of quantum states of atomic ensembles and photons. First a technique is discussed that allows one to transfer quantum states between light fields and metastable states of matter. The technique is based on trapping quantum states of photons in coherently driven atomic media, in which the group velocity is adiabatically reduced to zero. Next, possible mechanisms are outlined for manipulating quantum states of atomic ensembles. Specifically, a ``dipole blockade'' technique is considered in which optical excitation of mesoscopic samples into Rydberg states can be used to control the state of ensembles at the level of individual quanta. It is also noted that even simple processes involving atom-photon correlations can be used to effectively manipulate the ensemble states. Potentially these techniques can be used for implementation of important concepts from quantum information science.

Reviews of Modern PhysicsApr 9, 20031,140 citations

Quantum Memory in Atomic Ensembles

Joshua Nunn

Jan 1, 200810 citations

Toward Manipulating Quantum Information Using Atomic Ensembles

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