Optical Fiber Communication Conference

Trapped atoms + cavity quantum logic

Michael Chapman, M. D. Barrett, J. A. Sauer, Daiwei Zhu

Published Jan 1, 2001• 0 citations

Abstract

Integration of atomic quantum memories and cavity QED entanglement generation provides a versatile system for quantum information processing. Our configuration employs dipole force laser lattice traps that permit storage of many individually addressable atoms and manipulation of these atoms in arbitrary combinations using the quantum field of the optical cavity.

DOI: 10.1364/icqi.2001.pa36

Related papers

Quantum Logic with Trapped Atoms in Optical Cavity QED

Michael Chapman, Li You, Kennedy, T. A.

The principle goal of our program is the demonstration of scalable quantum logic between qubits encoded in the internal states of neutral atoms sharing the quantum field of an optical cavity. This requires successful integration of two leading quantum information technologies atom-based quantum memories and cavity QED-based entanglement generation and manipulation. We have developed methods for trapping atoms inside high-finesse optical resonators for scalable quantum logic. Our configuration employs infrared (CO2) laser traps for individual atoms that will permit us to store many individually addressable atoms and to manipulate these atoms in arbitrary combinations using the quantum field of the optical cavity. Importantly, the use of infrared trapping lasers virtually eliminates decoherence due to atomic spontaneous emission, which hinders many AMO-based systems.

Dec 1, 20010 citations

Implementation of Atom-Photon Interfaces for Quantum Networking

Lukas Brandt, Cecilia Muldoon, Tobias Thiele +4 more

We present two schemes for interfacing and manipulating individual atoms: One involves an array of dipole-traps using a spatial light modulator. The other implements cavity-based single photon generation combined with photon storage.

Conference on Lasers and Electro-OpticsJan 1, 20100 citations

Quantum Information Processing and Cavity QED

Christian Schön

This work is about the prospects provided by atoms coupled to optical cavities for the realization of concepts from the field of quantum information theory. In the first part we present a scheme for trapping an atom in its ground state in a cavity, which is basically in the vacuum state. Therefore losses are strongly suppressed. In the second part we investigate the generation of entangled qubits by the sequential coupling of an ancillary system to initially uncorrelated qubits. We characterize all achievable states and give a recipe for the generation on demand of an arbitrary state. In particular we discuss the case of an atom coupled to a cavity as a source. Finally we turn to collective effects in a system of many atoms coupled to the same mode of a cavity and show that they are suitable for the preparation of the atoms in an entangled state.

Jan 1, 20051 citation

Reversible Atomic Memories

A key requirement for quantum information processing applications such as quantum communication or computation is the ability to reliably store, manipulate, and retrieve a piece of information, encoded, for example, in the polarization state of a single photon. Among the many routes presently being explored to achieve these goals is cavity quantum electrodynamics (c-QED), which entails trapping a single atom in a cavity and inducing it to interact with a single photon. In this vein, Boozer et al. show that they are able to imprint the state of a single photon onto a single trapped Cs atom, store it for an appreciable fraction of the lifetime of the atom in the trap, and then retrieve that information again sometime later in the form of another photon and send it on its way. They verify that the whole process is coherent, providing further support for c-QED-based systems as promising candidates for nodes in a quantum information processing network. — ISO

ScienceMay 25, 20070 citations

Towards a scalable dipole-trapping scheme for neutral atoms

Lukas Brandt, Cecilia Muldoon, Edouard Brainis +1 more

We present a new scheme for trapping single atoms in separate dipole-traps and manipulating them individually. It relies on a spatial light-modulator to create the traps and will find applications in cavity-QED.

Conference on Lasers and Electro-OpticsMay 1, 20080 citations

Cavity QED for quantum logic, wavefunction synthesis, and atomic localization

Harry J. Kimble, Michael Chapman, Christina J. Hood +4 more

Summary form only given. The strong coupling of an atom to the field of a high-finesse optical cavity can be exploited to achieve conditional dynamics at the single photon level, synthesize arbitrary quantum states of the intracavity field, and trap and localize atoms via continuous quantum measurement.

Quantum Electronics and Laser Science ConferenceJun 7, 19960 citations