01233nas a2200157 4500008004100000245006500041210006300106260001400169490000800183520075800191100002300949700002200972700002400994700002001018856003701038 2012 eng d00aSteady-state many-body entanglement of hot reactive fermions0 aSteadystate manybody entanglement of hot reactive fermions c2012/12/40 v1093 a Entanglement is typically created via systematic intervention in the time
evolution of an initially unentangled state, which can be achieved by coherent
control, carefully tailored non-demolition measurements, or dissipation in the
presence of properly engineered reservoirs. In this paper we show that
two-component Fermi gases at ~\mu K temperatures naturally evolve, in the
presence of reactive two-body collisions, into states with highly entangled
(Dicke-type) spin wavefunctions. The entanglement is a steady-state property
that emerges---without any intervention---from uncorrelated initial states, and
could be used to improve the accuracy of spectroscopy in experiments with
fermionic alkaline earth atoms or fermionic groundstate molecules.
1 aFoss-Feig, Michael1 aDaley, Andrew, J.1 aThompson, James, K.1 aRey, Ana, Maria uhttp://arxiv.org/abs/1207.4741v101223nas a2200193 4500008004100000245006200041210005900103260001400162490000800176520066700184100002500851700002000876700002200896700002100918700001200939700001800951700002300969856003700992 2009 eng d00aAlkaline-Earth-Metal Atoms as Few-Qubit Quantum Registers0 aAlkalineEarthMetal Atoms as FewQubit Quantum Registers c2009/3/180 v1023 a We propose and analyze a novel approach to quantum information processing, in
which multiple qubits can be encoded and manipulated using electronic and
nuclear degrees of freedom associated with individual alkaline-earth atoms
trapped in an optical lattice. Specifically, we describe how the qubits within
each register can be individually manipulated and measured with sub-wavelength
optical resolution. We also show how such few-qubit registers can be coupled to
each other in optical superlattices via conditional tunneling to form a
scalable quantum network. Finally, potential applications to quantum
computation and precision measurements are discussed.
1 aGorshkov, Alexey, V.1 aRey, Ana, Maria1 aDaley, Andrew, J.1 aBoyd, Martin, M.1 aYe, Jun1 aZoller, Peter1 aLukin, Mikhail, D. uhttp://arxiv.org/abs/0812.3660v2