The Experts below are selected from a list of 17772 Experts worldwide ranked by ideXlab platform

S F Yelin - One of the best experts on this subject based on the ideXlab platform.

  • rydberg atom mediated nondestructive readout of collective rotational states in Polar Molecule arrays
    Physical Review A, 2016
    Co-Authors: E S Kuznetsova, S F Yelin, Seth T Rittenhouse, H R Sadeghpour
    Abstract:

    We analyze in detail the possibility to use charge-dipole interaction between a single Polar Molecule or a 1D molecular array and a single Rydberg atom to read out rotational populations. The change in the Rydberg electron energy is conditioned on the rotational state of the Polar Molecules, allowing for realization of a CNOT quantum gate between the Molecules and the atom. Subsequent readout of the atomic fluorescence results in a non-destructive measurement of the rotational state. We study the interaction between a 1D array of Polar Molecules and an array or a cloud of atoms in a Rydberg superatom (blockaded) state and calculate the resolved energy shifts of Rb(60s) with KRb and RbYb Molecules, with N=1, 3, 5 Molecules. We show that collective molecular rotational states can be read out using the conditioned Rydberg energy shifts.

  • rydberg atom mediated Polar Molecule interactions a tool for molecular state conditional quantum gates and individual addressability
    arXiv: Quantum Physics, 2011
    Co-Authors: S F Yelin, Elena Kuznetsova, Seth T Rittenhouse, H R Sadeghpour
    Abstract:

    We study the possibility to use interaction between a Polar Molecule in the ground electronic and vibrational state and a Rydberg atom to construct two-qubit gates between molecular qubits and to coherently control molecular states. A Polar Molecule within the electron orbit in a Rydberg atom can either shift the Rydberg state, or form Rydberg Molecule. Both the atomic shift and the Rydberg Molecule states depend on the initial internal state of the Polar Molecule, resulting in molecular state dependent van der Waals or dipole-dipole interaction between Rydberg atoms. Rydberg atoms mediated interaction between Polar Molecules can be enhanced up to $10^{3}$ times. We describe how the coupling between a Polar Molecule and a Rydberg atom can be applied to coherent control of molecular states, specifically, to individual addressing of Molecules in an optical lattice and non-destructive readout of molecular qubits.

  • phase gate and readout with an atom Molecule hybrid platform
    Physical Review A, 2010
    Co-Authors: Marko Gacesa, S F Yelin, Elena Kuznetsova, Robin Côté
    Abstract:

    In order to optimize quantum information processing in individual traps such as optical lattices, we propose a combined atom-Molecule system. In particular, gates, initialization, and readout are suggested, using two atoms of different species--one atom carrying the qubit and the other enabling interaction. We describe in some detail the implementation of a two-qubit phase gate in which a pair of atoms is transferred into the ground rovibrational state of a Polar Molecule with a large dipole moment, thus allowing Molecules in adjacent sites to interact via their dipole-dipole interaction. We also discuss how the reverse process could be used as a nondestructive readout tool.

  • analysis of experimental feasibility of Polar Molecule based phase gates
    Physical Review A, 2008
    Co-Authors: S F Yelin, Elena Kuznetsova, Robin Côté, K Kirby
    Abstract:

    We analyze a recently proposed physical implementation of a quantum computer based on Polar Molecules with ``switchable'' dipoles, i.e., dipole moments that can be switched ``on'' and ``off''. Conditional dipole-dipole interaction is an efficient tool for realizing two-qubit quantum gates necessary to construct universal gates. A set of general requirements for a molecular system is presented, which would provide an optimal combination of quantum gate times, coherence times, number of operations, high gate accuracy, and experimental feasibility. We proceed with an analysis of a two-qubit phase gate realization based on switchable dipole-dipole interactions between Polar Molecules in an optical lattice architecture. We consider one of the schemes proposed in our previous work [Phys. Rev. A 74, 050301(R) (2006)], using specific Molecules, such as CO and NF. We suggest suitable electronic states and transitions, and investigate requirements for the laser pulses driving them. Finally, we analyze possible sources of decoherence and list practical difficulties of the scheme.

Elena Kuznetsova - One of the best experts on this subject based on the ideXlab platform.

  • rydberg atom mediated Polar Molecule interactions a tool for molecular state conditional quantum gates and individual addressability
    arXiv: Quantum Physics, 2011
    Co-Authors: S F Yelin, Elena Kuznetsova, Seth T Rittenhouse, H R Sadeghpour
    Abstract:

    We study the possibility to use interaction between a Polar Molecule in the ground electronic and vibrational state and a Rydberg atom to construct two-qubit gates between molecular qubits and to coherently control molecular states. A Polar Molecule within the electron orbit in a Rydberg atom can either shift the Rydberg state, or form Rydberg Molecule. Both the atomic shift and the Rydberg Molecule states depend on the initial internal state of the Polar Molecule, resulting in molecular state dependent van der Waals or dipole-dipole interaction between Rydberg atoms. Rydberg atoms mediated interaction between Polar Molecules can be enhanced up to $10^{3}$ times. We describe how the coupling between a Polar Molecule and a Rydberg atom can be applied to coherent control of molecular states, specifically, to individual addressing of Molecules in an optical lattice and non-destructive readout of molecular qubits.

  • phase gate and readout with an atom Molecule hybrid platform
    Physical Review A, 2010
    Co-Authors: Marko Gacesa, S F Yelin, Elena Kuznetsova, Robin Côté
    Abstract:

    In order to optimize quantum information processing in individual traps such as optical lattices, we propose a combined atom-Molecule system. In particular, gates, initialization, and readout are suggested, using two atoms of different species--one atom carrying the qubit and the other enabling interaction. We describe in some detail the implementation of a two-qubit phase gate in which a pair of atoms is transferred into the ground rovibrational state of a Polar Molecule with a large dipole moment, thus allowing Molecules in adjacent sites to interact via their dipole-dipole interaction. We also discuss how the reverse process could be used as a nondestructive readout tool.

  • analysis of experimental feasibility of Polar Molecule based phase gates
    Physical Review A, 2008
    Co-Authors: S F Yelin, Elena Kuznetsova, Robin Côté, K Kirby
    Abstract:

    We analyze a recently proposed physical implementation of a quantum computer based on Polar Molecules with ``switchable'' dipoles, i.e., dipole moments that can be switched ``on'' and ``off''. Conditional dipole-dipole interaction is an efficient tool for realizing two-qubit quantum gates necessary to construct universal gates. A set of general requirements for a molecular system is presented, which would provide an optimal combination of quantum gate times, coherence times, number of operations, high gate accuracy, and experimental feasibility. We proceed with an analysis of a two-qubit phase gate realization based on switchable dipole-dipole interactions between Polar Molecules in an optical lattice architecture. We consider one of the schemes proposed in our previous work [Phys. Rev. A 74, 050301(R) (2006)], using specific Molecules, such as CO and NF. We suggest suitable electronic states and transitions, and investigate requirements for the laser pulses driving them. Finally, we analyze possible sources of decoherence and list practical difficulties of the scheme.

Rong Shen - One of the best experts on this subject based on the ideXlab platform.

  • The characteristics of Polar Molecule ER fluids and a new type of Polar Molecule ER fluid
    Smart Materials and Structures, 2017
    Co-Authors: Rong Shen
    Abstract:

    Electrorheological (ER) fluid is usually prepared by suspending the particles into dielectric oil. Recently developed Polar Molecule dominated ER (PM-ER) fluid is consisted of solid particles with Polar Molecules coating or adsorbing on their surfaces, which is denoted as PM(S)-ER fluid. We have reviewed the main characteristics of PM(S)-ER fluid and explained some observed phenomena. However the lifetime of PM(S)-ER fluid in practical applications is too short because of the friction loss of the Polar Molecules on the particles. In order to improve the lifetime of ER fluid a new type PM-ER fluid denoted as PM(L)-ER fluid has been developed by dissolving Polar Molecules into oil instead of adsorbing on the particles. The lifetime of PM(L)-ER fluid is 5 times longer than that of PM(S)-ER fluid, while the shear stress keeps high enough. The manufacture procedure of PM (L)-ER fluid is simple, in addition, the performance and repeatability of the material are easily controlled.

  • Polar Molecule dominated electrorheological pm er fluids the properties and evaluations
    International Journal of Modern Physics B, 2011
    Co-Authors: Rong Shen, Xuezhao Wang, D. Wang, Gang Sun
    Abstract:

    In recent years, a new type ER fluids named as Polar-Molecule-dominated electrorheological (PM-ER) fluids have been developed, of which the yield stress can reach more than 100 kPa and behaves a linear dependence on the electric field. A brief description on the composition and synthesizing method for the materials is given. The main merits of PM-ER fluid are as follows: high yield stress, the shear stress increasing with shear rate up to more than 103s-1, low current density, rapid electric response and anti-sedimentation. Some perspectives on PM-ER fluid and its applications are presented.

  • Polar Molecule dominated electrorheological fluids featuring high yield stresses
    Advanced Materials, 2009
    Co-Authors: Rong Shen, Xuezhao Wang, Gang Sun, D. Wang, Zexian Cao
    Abstract:

    Recent works on the development of various electrorheological (ER) fluids composed of TiO(2), Sr-Ti-O, and Ca-Ti-O particles coated with C-O/H-O Polar groups are summarized, in which an extremely large yield stress up to 200 kPa is measured and the dynamical yield stress reaches 117 kPa at a shear rate of 775 s(-1). Moreover, unlike that of traditional dielectric ER fluids, the yield stress displays a linear dependence on electric field strength. Experimental results reveal that it is the Polar Molecules adsorbed onto the dielectric particles that play the decisive role: the Polar-Molecule-dominated ER effect arises from the alignment of Polar Molecules by the enhanced local electric field in the gap between neighboring particles. The pretreatment of electrodes and the contrivance of new measuring procedures, whicha are desirable for the characterization and practical implementation of this material, are also discussed. The successful synthesis of these fluids has made many of the long since conceived applications of the ER effect available.

  • The electrode effect on Polar Molecule dominated electrorheological fluids
    Materials & Design, 2009
    Co-Authors: Xinfu Wang, Rong Shen, D. Wang, Lu Yuhai
    Abstract:

    The Polar Molecule dominated electrorheological (PM-ER) fluids are based on the interaction of Polar Molecule-charge in between the particles, of which the yield stress can be orders higher than that of conventional ER fluids. In the case of PM-ER fluids unlike conventional ER fluids the surfaces of ordinary metallic electrodes can no longer satisfy the boundary condition. A slide must occur at the interface between PM-ER fluids and electrodes leading to the much lower measured shear stress than its intrinsic value. According to the principle of PM-ER fluids modified electrodes are designed for increasing the adhesion of fluids to the electrodes and weakening the slide in shearing. Ions induced in the ER fluids are much harmful to the application of modified electrodes and should be avoided.

  • Polar Molecule type electrorheological fluids
    International Journal of Modern Physics B, 2007
    Co-Authors: Rong Shen, Xuezhao Wang, Gang Sun, Weijia Wen, Jixing Liu
    Abstract:

    The static and dynamic shear stress of newly developed electrorheological (ER) fluids can reach more than 100 kPa and over 60 kPa at 3 kV/mm, respectively. The high yield stress of those ER fluids and its near linear dependence on the electric field are different from the conventional ER fluids and can not be explained with traditional dielectric theory. Experiment demonstrates that the Polar Molecules adsorbed on the particles play crucial role in those ER fluids, which can be named as Polar Molecule type electrorheological (PM-ER) fluids. To explain PM-ER effect a model is proposed based on the interaction of Polar Molecule-charge in between the particles, where the local electric field is much higher than the external one and can cause the Polar Molecules aligning. The main effective factors for achieving high-performance PM-ER fluids are discussed.

Seth T Rittenhouse - One of the best experts on this subject based on the ideXlab platform.

  • rydberg atom mediated nondestructive readout of collective rotational states in Polar Molecule arrays
    Physical Review A, 2016
    Co-Authors: E S Kuznetsova, S F Yelin, Seth T Rittenhouse, H R Sadeghpour
    Abstract:

    We analyze in detail the possibility to use charge-dipole interaction between a single Polar Molecule or a 1D molecular array and a single Rydberg atom to read out rotational populations. The change in the Rydberg electron energy is conditioned on the rotational state of the Polar Molecules, allowing for realization of a CNOT quantum gate between the Molecules and the atom. Subsequent readout of the atomic fluorescence results in a non-destructive measurement of the rotational state. We study the interaction between a 1D array of Polar Molecules and an array or a cloud of atoms in a Rydberg superatom (blockaded) state and calculate the resolved energy shifts of Rb(60s) with KRb and RbYb Molecules, with N=1, 3, 5 Molecules. We show that collective molecular rotational states can be read out using the conditioned Rydberg energy shifts.

  • spin waves and dielectric softening of Polar Molecule condensates
    Physical Review Letters, 2014
    Co-Authors: Ryan Wilson, Brandon Peden, Charles W Clark, Seth T Rittenhouse
    Abstract:

    We consider an oblate Bose-Einstein condensate of heteronuclear Polar Molecules in a weak applied electric field. This system supports a rich quasiparticle spectrum that plays a critical role in determining its bulk dielectric properties. In particular, in sufficiently weak fields the system undergoes a Polarization wave rotonization, leading to the development of textured electronic structure and a dielectric instability that is characteristic of the onset of a negative static dielectric function.

  • rydberg atom mediated Polar Molecule interactions a tool for molecular state conditional quantum gates and individual addressability
    arXiv: Quantum Physics, 2011
    Co-Authors: S F Yelin, Elena Kuznetsova, Seth T Rittenhouse, H R Sadeghpour
    Abstract:

    We study the possibility to use interaction between a Polar Molecule in the ground electronic and vibrational state and a Rydberg atom to construct two-qubit gates between molecular qubits and to coherently control molecular states. A Polar Molecule within the electron orbit in a Rydberg atom can either shift the Rydberg state, or form Rydberg Molecule. Both the atomic shift and the Rydberg Molecule states depend on the initial internal state of the Polar Molecule, resulting in molecular state dependent van der Waals or dipole-dipole interaction between Rydberg atoms. Rydberg atoms mediated interaction between Polar Molecules can be enhanced up to $10^{3}$ times. We describe how the coupling between a Polar Molecule and a Rydberg atom can be applied to coherent control of molecular states, specifically, to individual addressing of Molecules in an optical lattice and non-destructive readout of molecular qubits.

Alexey V Gorshkov - One of the best experts on this subject based on the ideXlab platform.

  • topological phases in Polar Molecule quantum magnets
    Bulletin of the American Physical Society, 2013
    Co-Authors: Alexey V Gorshkov, Salvatore R Manmana, E M Stoudenmire, Kaden R A Hazzard, Ana Maria Rey, Norman Yao, C R Laumann, Steven Bennett, Andreas M Lauchli, P Zoller
    Abstract:

    A. V. Gorshkov, N. Y. Yao, S. R. Manmana, 4 C. R. Laumann, 5 E. M. Stoudenmire, K. R. A. Hazzard, S. D. Bennett, A. M. Lauchli, E. Demler, P. Zoller, J. Ye, M. D. Lukin, and A. M. Rey IQIM, California Institute of Technology, Pasadena, CA 91125, USA Physics Department, Harvard University, Cambridge, MA 02138, USA Institute for Theoretical Physics, University of Gottingen, D-37077 Gottingen, Germany JILA, NIST & Department of Physics, University of Colorado, Boulder, CO 80309, USA ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138, USA Department of Physics and Astronomy, University of California, Irvine, CA 92697, USA Institut fur Theoretische Physik, Universitat Innsbruck, A-6020 Innsbruck, Austria IQOQI of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria

  • topological phases in ultracold Polar Molecule quantum magnets
    Physical Review B, 2013
    Co-Authors: Salvatore R Manmana, E M Stoudenmire, Kaden R A Hazzard, Ana Maria Rey, Alexey V Gorshkov
    Abstract:

    We show how to use Polar Molecules in an optical lattice to engineer quantum spin models with arbitrary spin S≥1/2 and with interactions featuring a direction-dependent spin anisotropy. This is achieved by encoding the effective spin degrees of freedom in microwave-dressed rotational states of the Molecules and by coupling the spins through diPolar interactions. We demonstrate how one of the experimentally most accessible anisotropies stabilizes symmetry protected topological phases in spin ladders. Using the numerically exact density matrix renormalization group method, we find that these interacting phases—previously studied only in the nearest-neighbor case—survive in the presence of long-range diPolar interactions. We also show how to use our approach to realize the bilinear-biquadratic spin-1 and the Kitaev honeycomb models. Experimental detection schemes and imperfections are discussed.