PRA 2012 ANNUAL INDEX - VOLUMES 85 and 86 Section J

Collaborations | Authors A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Jaaskelainen, Markku

    Markku J{\"a}{\"a}skel{\"a}inen
    Gravitational self-localization for spherical masses
    PACS: 03.65.Ta 03.65.Ge 03.75.-b
    Phys. Rev. A 86, 052105 (2012) [abstract]
Jachymski, Krzysztof
    Krzysztof Jachymski and Zbigniew Idziaszek
    Light scattering from ultracold gases in disordered optical lattices
    PACS: 03.75.Nt 03.75.Lm 05.30.Jp 61.44.Fw
    Phys. Rev. A 86, 023607 (2012) [abstract]
Jackson, Steven R.
    Steven R. Jackson, Teng Jian Khoo, and Frederick W. Strauch
    Quantum walks on trees with disorder: Decay, diffusion, and localization
    PACS: 03.67.Lx 03.65.Pm
    Phys. Rev. A 86, 022335 (2012) [abstract]
Jacob, Andreas Jacob, David
    David Jacob, Lingxuan Shao, Vincent Corre, Tilman Zibold, Luigi De Sarlo, Emmanuel Mimoun, Jean Dalibard, and Fabrice Gerbier
    Phase diagram of spin-1 antiferromagnetic Bose-Einstein condensates
    PACS: 67.85.-d 03.75.Hh 05.30.Jp
    Phys. Rev. A 86, 061601(R) (2012) [abstract]
Jacobs, Kurt Jacqmin, Thibaut
    Thibaut Jacqmin, Bess Fang, Tarik Berrada, Tommaso Roscilde, and Isabelle Bouchoule
    Momentum distribution of one-dimensional Bose gases at the quasicondensation crossover: Theoretical and experimental investigation
    PACS: 03.75.Hh 67.10.Ba
    Phys. Rev. A 86, 043626 (2012) [abstract]
Jacques, V.
    see [Kubo,Y., Phys. Rev. A 85, 012333 (2012)]
Jaekel, MarcThierry Jafari, M. Jafari, S.A. Jafarpour, Mojtaba Jagatap, B.N. Jager, Wolfgang
    see [Merz,Simon, Phys. Rev. A 85, 063411 (2012)]
Jagutzki, O. Jahnke, T. Jain, Munendra Jakobsen, P.
    see [Kolesik,M., Phys. Rev. A 86, 035801 (2012)]
Jaksch, D.
    see [Pino,M., Phys. Rev. A 86, 023631 (2012)]
Jaksch, Dieter JakubassaAmundsen, D.H.
    D.H. Jakubassa-Amundsen
    Equivalence of a tip bremsstrahlung quantum and an elastically scattered electron at ultrahigh energies
    PACS: 34.80.Pa 34.80.Bm 41.60.-m 34.80.Nz
    Phys. Rev. A 85, 042714 (2012) [abstract]
James, Daniel F.V. James, Matthew R. James, M.R. Jamison, Alan O. Jana, S.
    see [Samanta,R., Phys. Rev. A 85, 032714 (2012)]
Janeckova, R.
    R. Jane\v{c}kov\'{a}, O. May, and J. Fedor
    Dissociative electron attachment to methylacetylene and dimethylacetylene: Symmetry versus proximity
    PACS: 34.80.Ht
    Phys. Rev. A 86, 052702 (2012) [abstract]
Janev, R.K.
    see [Liu,C.H., Phys. Rev. A 85, 042719 (2012)]
Jankala, K.
    see [Anin,D., Phys. Rev. A 86, 063410 (2012)]
Jankowski, Karol
    Karol Jankowski and Kirk A. Peterson
    \textit{Ab initio} studies of electron correlation effects in heavier closed-shell atoms: Structure of the all-electron correlation energies of Zn$^{2+}$ and Zn
    PACS: 31.15.ve
    Phys. Rev. A 86, 022526 (2012) [abstract]
Jansen, Paul Janunts, N.
    see [Schmidt,C., Phys. Rev. A 85, 033827 (2012)]
Jarmola, A. JaronBecker, Agnieszka Jarzyna, Marcin
    Marcin Jarzyna and Rafa{\l} Demkowicz-Dobrza\'{n}ski
    Quantum interferometry with and without an external phase reference
    PACS: 42.50.St 03.67.Mn 03.65.Ta 06.20.Dk
    Phys. Rev. A 85, 011801(R) (2012) [abstract]
Jason, Peter
    Peter Jason and Magnus Johansson
    Exact localized eigenstates for an extended Bose-Hubbard model with pair-correlated hopping
    PACS: 03.75.Lm 05.30.Jp 05.45.Yv 67.85.-d
    Phys. Rev. A 85, 011603(R) (2012) [abstract]
Jauregui, Rocio Jauslin, H.R.
    see [Eleuch,H., Phys. Rev. A 85, 013830 (2012)]
Javanainen, Juha
    Juha Javanainen, Otim Odong, and Jerome C. Sanders
    One- and two-atom states in a rotating ring lattice
    PACS: 03.75.Lm 37.10.Jk 05.30.Jp 05.50.+q
    Phys. Rev. A 85, 033637 (2012) [abstract]

    Juha Javanainen and Han Chen
    Optimal measurement precision of a nonlinear interferometer
    PACS: 03.75.Dg 03.75.Lm 06.20.Dk
    Phys. Rev. A 85, 063605 (2012) [abstract]

Javani, Mohammad H. Jedrkiewicz, O. Jellal, A. Jen, H.H.
    H.H. Jen
    Positive-$P$ phase-space-method simulation of superradiant emission from a cascade atomic ensemble
    PACS: 42.50.Lc 42.50.Gy 02.50.Ey 02.60.Lj
    Phys. Rev. A 85, 013835 (2012) [abstract]
Jeng, C.C.
    see [Shen,M., Phys. Rev. A 86, 013827 (2012)]
Jenkins, Stewart D.
    Stewart D. Jenkins and Janne Ruostekoski
    Controlled manipulation of light by cooperative response of atoms in an optical lattice
    PACS: 03.75.Lm 32.80.Qk
    Phys. Rev. A 86, 031602(R) (2012) [abstract]
Jennewein, Thomas Jennings, David Jensen, A.S. Jensen, K. Jentschura, U.D. Jeong, Hyunseok Jessen, F. Jevtic, Sania
    Sania Jevtic, David Jennings, and Terry Rudolph
    Quantum mutual information along unitary orbits
    PACS: 03.65.Ud 03.67.Mn 03.65.Ta 05.70.Ln
    Phys. Rev. A 85, 052121 (2012) [abstract]
Jex, I. Jezek, M.
    M. Je\v{z}ek, A. Tipsmark, R. Dong, J. Fiur\'a\v{s}ek, L. Mi\v{s}ta Jr., R. Filip, and U.L. Andersen
    Experimental test of the strongly nonclassical character of a noisy squeezed single-photon state
    PACS: 42.50.Dv 03.65.Ta
    Phys. Rev. A 86, 043813 (2012) [abstract]
Jezek, Miroslav Jha, Pankaj K. Jhumka, Sarah Ji, A.C.
    see [Wen,L., Phys. Rev. A 86, 043602 (2012)]
Ji, M.C.
    see [Feng,D., Phys. Rev. A 85, 064901 (2012)]
Ji, Mingchao
    see [Zhou,Hu, Phys. Rev. A 85, 014901 (2012)]
Ji, SeWan Ji, Zhengfeng Ji, Zhonghua
    Zhonghua Ji, Hongshan Zhang, Jizhou Wu, Jinpeng Yuan, Yonggang Yang, Yanting Zhao, Jie Ma, Lirong Wang, Liantuan Xiao, and Suotang Jia
    Photoassociative formation of ultracold RbCs molecules in the $(2)^3\Pi$ state
    PACS: 37.10.Mn 32.80.Rm 33.15.Mt 33.15.Kr
    Phys. Rev. A 85, 013401 (2012) [abstract]
Jia, BaoHua Jia, ChunSheng Jia, Suotang Jia, Tianqing Jia, Xiaojun
    see [Yan,Zhihui, Phys. Rev. A 85, 040305(R) (2012)]
Jian, Pu Jiang, Fengjian Jiang, HaoXiang Jiang, J.
    see [Wu,Z.W., Phys. Rev. A 86, 022712 (2012)]
Jiang, Jiaming
    see [Gong,Cheng, Phys. Rev. A 85, 033410 (2012)]
Jiang, JianHua
    Jian-Hua Jiang
    Tunable topological Weyl semimetal from simple-cubic lattices with staggered fluxes
    PACS: 03.75.Ss 71.10.Fd 05.30.Fk 03.65.Vf
    Phys. Rev. A 85, 033640 (2012) [abstract]
Jiang, Jun Jiang, Kaijun Jiang, Kebei
    Kebei Jiang, Chase J. Brignac, Yi Weng, Moochan B. Kim, Hwang Lee, and Jonathan P. Dowling
    Strategies for choosing path-entangled number states for optimal robust quantum-optical metrology in the presence of loss
    PACS: 42.50.St 42.50.Dv 03.65.Ud 42.50.Lc
    Phys. Rev. A 86, 013826 (2012) [abstract]
Jiang, L. Jiang, Lang
    Lang Jiang, Guangqiang He, Ding Nie, Jin Xiong, and Guihua Zeng
    Quantum anonymous voting for continuous variables
    PACS: 03.67.Dd 03.65.Ud
    Phys. Rev. A 85, 042309 (2012) [abstract]
Jiang, Lei
    see [Liu,Xia-Ji, Phys. Rev. A 85, 021603(R) (2012)]
Jiang, Lizhen Jiang, M.
    M. Jiang, W. Su, Z.Q. Lv, X. Lu, Y.J. Li, R. Grobe, and Q. Su
    Pair creation enhancement due to combined external fields
    PACS: 34.50.Rk 03.65.-w
    Phys. Rev. A 85, 033408 (2012) [abstract]

    see [Su,W., Phys. Rev. A 86, 013422 (2012)]

Jiang, MuSheng
    see [Sun,Shi-Hai, Phys. Rev. A 85, 032304 (2012)]
    see [Sun,Shi-Hai, Phys. Rev. A 86, 012305 (2012)]

    Mu-Sheng Jiang, Shi-Hai Sun, Chun-Yan Li, and Lin-Mei Liang
    Wavelength-selected photon-number-splitting attack against plug-and-play quantum key distribution systems with decoy states
    PACS: 03.67.Dd 03.67.Hk
    Phys. Rev. A 86, 032310 (2012) [abstract]

Jiang, WeiChao
    Wei-Chao Jiang, Oleg I. Tolstikhin, Liang-You Peng, and Qihuang Gong
    Static-field-induced states and their manifestation in tunneling ionization dynamics of molecules
    PACS: 32.80.Rm 33.80.Rv 42.50.Hz
    Phys. Rev. A 85, 023404 (2012) [abstract]

    see [Peng,Liang-You, Phys. Rev. A 86, 063401 (2012)]

Jiang, Xiujuan
    see [Li,Huagang, Phys. Rev. A 86, 023840 (2012)]
Jiang, XueFeng Jiang, Y.H. Jiang, Ying
    see [Zhi,Lin, Phys. Rev. A 85, 023619 (2012)]
    see [Lin,Zhi, Phys. Rev. A 86, 033625 (2012)]
Jiang, Z.
    see [Zhu,L.F., Phys. Rev. A 85, 030501(R) (2012)]
Jiang, Zhang Jimenez, O.
    see [Neves,L., Phys. Rev. A 85, 062322 (2012)]
    see [Araneda,G., Phys. Rev. A 86, 052332 (2012)]
Jimenez Farias, O.
    O. Jim\'enez Far\'{\i}as, A. Vald\'es-Hern\'andez, G.H. Aguilar, P.H. Souto Ribeiro, S.P. Walborn, L. Davidovich, Xiao-Feng Qian, and J.H. Eberly
    Experimental investigation of dynamical invariants in bipartite entanglement
    PACS: 03.67.Mn 03.67.Bg 42.50.Dv
    Phys. Rev. A 85, 012314 (2012) [abstract]
JimenezGarcia, K. JimenezHoyos, Carlos A.
    Carlos A. Jim\'enez-Hoyos, R. Rodr\'iguez-Guzm\'an, and Gustavo E. Scuseria
    $N$-electron Slater determinants from nonunitary canonical transformations of fermion operators
    PACS: 03.65.Ca 71.27.+a 74.20.Pq 71.10.Fd
    Phys. Rev. A 86, 052102 (2012) [abstract]
Jin, Cheng
    Cheng Jin, Julien B. Bertrand, R.R. Lucchese, H.J. W\"orner, Paul B. Corkum, D.M. Villeneuve, Anh-Thu Le, and C.D. Lin
    Intensity dependence of multiple orbital contributions and shape resonance in high-order harmonic generation of aligned N$_{2}$ molecules
    PACS: 33.80.Rv 42.65.Ky 31.70.Hq 33.80.Eh
    Phys. Rev. A 85, 013405 (2012) [abstract]

    Cheng Jin and C.D. Lin
    Comparison of high-order harmonic generation of Ar using truncated Bessel and Gaussian beams
    PACS: 32.80.Rm 42.65.Ky 31.70.Hq 32.80.Fb
    Phys. Rev. A 85, 033423 (2012) [abstract]

    see [Wang,Guoli, Phys. Rev. A 86, 015401 (2012)]

Jin, ChongJun Jin, D.S.
    see [Drake,T.E., Phys. Rev. A 86, 031601(R) (2012)]
Jin, H.
    see [Xu,P., Phys. Rev. A 86, 013805 (2012)]
Jin, Jing
    see [Shen,Heng, Phys. Rev. A 85, 032317 (2012)]
Jin, Jingjing
    see [Han,Wei, Phys. Rev. A 85, 043626 (2012)]
Jin, L.
    see [Zhang,X.Z., Phys. Rev. A 85, 012106 (2012)]

    L. Jin and Z. Song
    Hermitian scattering behavior for a non-Hermitian scattering center
    PACS: 11.30.Er 03.65.Nk 42.82.Et
    Phys. Rev. A 85, 012111 (2012) [abstract]

    see [Hu,W.H., Phys. Rev. A 86, 042110 (2012)]

Jin, WeiLiang Jin, XianMin Jin, YingJun
    Ying-Jun Jin, Xiao-Min Tong, and Nobuyuki Toshima
    Anomalous alignment dependence of the third-order harmonic of H$_2^+$ ions in intense laser fields
    PACS: 33.80.Rv 42.65.Ky 33.20.Xx
    Phys. Rev. A 86, 053418 (2012) [abstract]
Jing, H.
    see [Singh,S., Phys. Rev. A 86, 021801(R) (2012)]

    H. Jing, X. Zhao, and L.F. Buchmann
    Quantum optomechanics with a mixture of ultracold atoms
    PACS: 42.50.-p 67.85.-d 37.30.+i
    Phys. Rev. A 86, 065801 (2012) [abstract]

Jing, Jian Jing, Jun
    Jun Jing, Lian-Ao Wu, J.Q. You, and Ting Yu
    Feshbach projection-operator partitioning for quantum open systems: Stochastic approach
    PACS: 03.65.Yz 02.30.Yy 03.67.Pp 42.50.Lc
    Phys. Rev. A 85, 032123 (2012) [abstract]

    Jun Jing, Xinyu Zhao, J.Q. You, and Ting Yu
    Time-local quantum-state-diffusion equation for multilevel quantum systems
    PACS: 03.65.Yz 42.50.Lc 05.30.-d
    Phys. Rev. A 85, 042106 (2012) [abstract]

    see [Wang,Zhao-Ming, Phys. Rev. A 86, 032303 (2012)]

Jing, Li
    see [Xiong,Zhao-Xi, Phys. Rev. A 85, 012334 (2012)]

    Li Jing, Yi-Nan Wang, Han-Duo Shi, Liang-Zhu Mu, and Heng Fan
    Minimal input sets determining phase-covariant and universal quantum cloning
    PACS: 03.67.Ac 03.65.Aa 03.67.Dd
    Phys. Rev. A 86, 062315 (2012) [abstract]

Jing, Naihuan Jo, A.
    see [Gauf,A., Phys. Rev. A 85, 052717 (2012)]
Joag, Pramod S. Joannopoulos, J.D. Joglekar, Yogesh N. Johansson, G. Johansson, Magnus Johansson, Markus
    Markus Johansson, Marie Ericsson, Kuldip Singh, Erik Sj\"oqvist, and Mark S. Williamson
    Topological phases and multiqubit entanglement
    PACS: 03.65.Vf 03.67.Mn
    Phys. Rev. A 85, 032112 (2012) [abstract]

    Markus Johansson, Erik Sj\"oqvist, L.Mauritz Andersson, Marie Ericsson, Bj\"orn Hessmo, Kuldip Singh, and D.M. Tong
    Robustness of nonadiabatic holonomic gates
    PACS: 03.67.Lx 03.65.Vf 03.65.Yz
    Phys. Rev. A 86, 062322 (2012) [abstract]

John, Holger Johne, Robert
    Robert Johne and Andrea Fiore
    Proposal for a two-qubit quantum phase gate for quantum photonic integrated circuits
    PACS: 42.50.Ct 42.50.Pq 78.67.Hc
    Phys. Rev. A 86, 063815 (2012) [abstract]
Johnson, Nora G. Johnson, Paul V. Johnson, P.V.
    see [Heays,A.N., Phys. Rev. A 85, 012705 (2012)]
Johnson, Steven G. Johnsson, P. JonaLasinio, M.
    see [Billy,J., Phys. Rev. A 86, 051603(R) (2012)]
Jones, A.C.L. Jones, D.B.
    D.B. Jones, M. Yamazaki, N. Watanabe, and M. Takahashi
    Electron-impact ionization of N$_2$ at large momentum transfer above the double-ionization threshold
    PACS: 34.80.Gs
    Phys. Rev. A 86, 062707 (2012) [abstract]
Jones, Hugh F. Jones, N.Cody Jones, R.R. Jonson, M.
    see [Joshi,C., Phys. Rev. A 85, 033805 (2012)]
Jonsson, Per Joo, Jaewoo
    Jaewoo Joo, Kimin Park, Hyunseok Jeong, William J. Munro, Kae Nemoto, and Timothy P. Spiller
    Quantum metrology for nonlinear phase shifts with entangled coherent states
    PACS: 42.50.St 42.50.Dv 06.20.Dk
    Phys. Rev. A 86, 043828 (2012) [abstract]
Jordan, A.N. Joshi, C.
    C. Joshi, J. Larson, M. Jonson, E. Andersson, and P. \"Ohberg
    Entanglement of distant optomechanical systems
    PACS: 42.50.Pq 03.67.Mn 03.65.Yz
    Phys. Rev. A 85, 033805 (2012) [abstract]
Joubert, Daniel P.
    Daniel P. Joubert
    Functional relations for the density-functional exchange and correlation functionals connecting functionals at three densities
    PACS: 31.15.E- 71.15.Mb
    Phys. Rev. A 85, 032511 (2012) [abstract]

    Daniel P. Joubert
    Mapping Kohn-Sham eigenenergies onto vertical ionization energies and electron affinities
    PACS: 31.15.E- 71.15.Mb 71.45.Gm
    Phys. Rev. A 85, 062509 (2012) [abstract]

Jouguet, Paul
    Paul Jouguet, S\'ebastien Kunz-Jacques, Eleni Diamanti, and Anthony Leverrier
    Analysis of imperfections in practical continuous-variable quantum key distribution
    PACS: 03.67.Dd
    Phys. Rev. A 86, 032309 (2012) [abstract]
Jouin, H.
    see [Leredde,A., Phys. Rev. A 85, 032710 (2012)]
Jouravlev, Mikhail
    Mikhail Jouravlev, Daniel R. Mason, and Kwang S. Kim
    Ultralow Raman lasing threshold and enhanced gain of whispering gallery modes in silica microspheres
    PACS: 42.50.Pq 42.50.Dv 42.60.Da 42.65.Dr
    Phys. Rev. A 85, 013825 (2012) [abstract]
Journel, Loic Jovic, Dragana M.
    Dragana M. Jovi\'c, Milivoj R. Beli\'c, and Cornelia Denz
    Anderson localization of light at the interface between linear and nonlinear dielectric media with an optically induced photonic lattice
    PACS: 42.25.Dd 72.15.Rn
    Phys. Rev. A 85, 031801(R) (2012) [abstract]
Joyeux, D. Joynt, Robert Jreissaty, Mark
    Mark Jreissaty, Juan Carrasquilla, F.Alexander Wolf, and Marcos Rigol
    Erratum: Expansion of Bose-Hubbard Mott insulators in optical lattices [Phys. Rev. A \textbf{84}, 043610 (2011)]
    PACS: 03.75.Kk 03.75.Hh 05.30.Jp 99.10.Cd
    Phys. Rev. A 85, 069905(E) (2012) [abstract]
Ju, Heongkyu
    Heongkyu Ju
    Intrapulse quantum spectral correlation of femtosecond optical pulses in optical fiber
    PACS: 42.65.Re 42.50.Ar 42.65.Tg 42.50.Lc
    Phys. Rev. A 85, 033810 (2012) [abstract]
JuliaDiaz, B.
    see [Gra\ss,T., Phys. Rev. A 86, 021603(R) (2012)]

    B. Juli\'a-D\'iaz, T. Zibold, M.K. Oberthaler, M. Mel\'e-Messeguer, J. Martorell, and A. Polls
    Dynamic generation of spin-squeezed states in bosonic Josephson junctions
    PACS: 03.75.Lm 03.75.Gg 03.75.Kk
    Phys. Rev. A 86, 023615 (2012) [abstract]

    see [Mel\'e-Messeguer,M., Phys. Rev. A 86, 053626 (2012)]
    see [Gra\ss,T., Phys. Rev. A 86, 053629 (2012)]

    B. Juli\'a-D\'iaz, E. Torrontegui, J. Martorell, J.G. Muga, and A. Polls
    Fast generation of spin-squeezed states in bosonic Josephson junctions
    PACS: 03.75.Kk 42.50.Dv 05.30.Jp 42.50.Lc
    Phys. Rev. A 86, 063623 (2012) [abstract]

Julienne, Paul S. Julsgaard, B.
    B. Julsgaard and K. M{\o}lmer
    Reflectivity and transmissivity of a cavity coupled to two-level systems: Coherence properties and the influence of phase decay
    PACS: 42.50.Pq 37.30.+i 42.50.Ar 42.50.Nn
    Phys. Rev. A 85, 013844 (2012) [abstract]
Julsgaard, Brian
    Brian Julsgaard and Klaus M{\o}lmer
    Measurement-induced two-qubit entanglement in a bad cavity: Fundamental and practical considerations
    PACS: 03.67.Bg 42.50.Pq 42.50.Lc 03.65.Ta
    Phys. Rev. A 85, 032327 (2012) [abstract]

    Brian Julsgaard and Klaus M{\o}lmer
    Dynamical evolution of an inverted spin ensemble in a cavity: Inhomogeneous broadening as a stabilizing mechanism
    PACS: 42.50.Pq 42.50.Ct 42.50.Nn
    Phys. Rev. A 86, 063810 (2012) [abstract]

Jun, Y.
    see [Duan,B., Phys. Rev. A 86, 052502 (2012)]
Jung, Jaehoon Jung, JinWook
    Jin-Wook Jung, Kyungsun Na, and L.E. Reichl
    Scattering from radiation-induced entangled states
    PACS: 34.50.Rk 32.80.-t 03.65.Nk 05.60.Gg
    Phys. Rev. A 85, 023420 (2012) [abstract]
Jungen, Ch. Junginger, Andrej
    Andrej Junginger, J\"{o}rg Main, and G\"{u}nter Wunner
    Quantum-classical model for the formation of Rydberg molecules
    PACS: 34.50.Cx 34.20.Cf
    Phys. Rev. A 86, 012713 (2012) [abstract]

    Andrej Junginger, J\"org Main, G\"unter Wunner, and Thomas Bartsch
    Symmetry-breaking thermally induced collapse of dipolar Bose-Einstein condensates
    PACS: 03.75.Kk 67.85.De 82.20.Db
    Phys. Rev. A 86, 023632 (2012) [abstract]

Jurgensen, Ole
    Ole J\"urgensen, Klaus Sengstock, and Dirk-S\"oren L\"uhmann
    Density-induced processes in quantum gas mixtures in optical lattices
    PACS: 03.75.Lm 67.85.Pq 71.10.Fd
    Phys. Rev. A 86, 043623 (2012) [abstract]
Justino, L.
    L. Justino and Thiago R. de Oliveira
    Bell inequalities and entanglement at quantum phase transitions in the $XXZ$ model
    PACS: 03.65.Ud 05.30.-d 64.70.Tg 03.65.Ta
    Phys. Rev. A 85, 052128 (2012) [abstract]

    Collaborations | Authors A B C D E F G H I J K L M N O P Q R S T U V W X Y Z