Collective State Measurement of Mesoscopic Ensembles with Single-Atom Resolution: Supplementary Information
نویسندگان
چکیده
Hao Zhang, Robert McConnell, Senka Ćuk, 2 Qian Lin, Monika H. Schleier-Smith, Ian D. Leroux, and Vladan Vuletić 1 Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 2 Institute of Physics, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia (Dated: August 10, 2012)
منابع مشابه
Collective state measurement of mesoscopic ensembles with single-atom resolution.
We demonstrate single-atom resolution, as well as detection sensitivity more than 20 dB below the quantum projection noise limit, for hyperfine-state-selective measurements on mesoscopic ensembles containing 100 or more atoms. The measurement detects the atom-induced shift of the resonance frequency of an optical cavity containing the ensemble. While spatially varying coupling of atoms to the c...
متن کاملEntangling single- and N-atom qubits for fast quantum state detection and transmission
Isolated neutral atoms trapped by electromagnetic fields are being studied intensively as a way of implementing a scalable quantum processor. In this approach to quantum logic the qubit basis states are represented by different ground-state hyperfine levels. The hyperfine states have decoherence times that are potentially many seconds long, limited mainly by weak interactions with the trapping ...
متن کاملDouble-well atom trap for fluorescence detection at the Heisenberg limit
We experimentally demonstrate an atom number detector capable of simultaneous detection of two mesoscopic ensembles with single-atom resolution. Such a sensitivity is a prerequisite for quantum metrology at a precision approaching the Heisenberg limit. Our system is based on fluorescence detection of atoms in a hybrid trap in which a dipole barrier divides a magneto-optical trap into two separa...
متن کاملSingle-photon bus connecting spin-wave quantum memories
Generation of non-classical correlations (or entanglement) between atoms, photons or combinations thereof 9–11 is at the heart of quantum information science. Of particular interest are material systems serving as quantum memories that can be interconnected optically . An ensemble of atoms can store a quantum state in the form of a magnon—which is a quantized collective spin excitation—that can...
متن کاملAccurate atom counting in mesoscopic ensembles.
Many cold atom experiments rely on precise atom number detection, especially in the context of quantum-enhanced metrology where effects at the single particle level are important. Here, we investigate the limits of atom number counting via resonant fluorescence detection for mesoscopic samples of trapped atoms. We characterize the precision of these fluorescence measurements beginning from the ...
متن کامل