Showing 2015 · cond-mat.mes-hallShow all

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cond-mat.mes-hall2015★ 212 cited

Unexpectedly Large Tunability of Lattice Thermal Conductivity of Monolayer Silicene via Mechanical Strain

Han Xie, Tao Ouyang, Éric Germaneau +3

Strain engineering is one of the most promising and effective routes toward continuously tuning the electronic and optic properties of materials, while thermal properties are gener…

cond-mat.mes-hall2015★ 3 cited

Modeling charge relaxation in graphene quantum dots induced by electron-phonon interaction

Sven Reichardt, Christoph Stampfer

We study and compare two analytic models of graphene quantum dots for calculating charge relaxation times due to electron-phonon interaction. Recently, charge relaxation processes…

cond-mat.mes-hall2015★ 7 cited

Probing electronic lifetimes and phonon anharmonicities in high-quality chemical vapor deposited graphene by magneto-Raman spectroscopy

Christoph Neumann, Donatus Halpaap, Sven Reichardt +6

We present a magneto-Raman study on high-quality single-layer graphene grown by chemical vapor deposition (CVD) that is fully encapsulated in hexagonal boron nitride by a dry trans…

cond-mat.mes-hall2015★ 83 cited

Quantitatively Analyzing Phonon Spectral Contribution of Thermal Conductivity Based on Non-Equilibrium Molecular Dynamics Simulation II: From Time Fourier Transform

Yanguang Zhou, Ming Hu

From nano-scale heat transfer point of view, currently one of the most interesting and challenging tasks is to quantitatively analyzing phonon mode specific transport properties in…

cond-mat.mes-hall2015★ 282 cited

High Kinetic Inductance Superconducting Nanowire Resonators for Circuit QED in a Magnetic Field

N. Samkharadze, A. Bruno, P. Scarlino +4

We present superconducting microwave-frequency resonators based on NbTiN nanowires. The small cross section of the nanowires minimizes vortex generation, making the resonators resi…

cond-mat.mes-hall2015★ 26 cited

Spatial control of laser-induced doping profiles in graphene on hexagonal boron nitride

Christoph Neumann, Leo Rizzi, Sven Reichardt +6

We present a method to create and erase spatially resolved doping profiles in graphene-hexagonal boron nitride (hBN) heterostructures. The technique is based on photo-induced dopin…

cond-mat.mes-hall2015★ 322 cited

Ballistic transport exceeding 28 μm in CVD grown graphene

Luca Banszerus, Michael Schmitz, Stephan Engels +5

We report on ballistic transport over more than 28 μm in graphene grown by chemical vapor deposition (CVD) that is fully encapsulated in hexagonal boron nitride. The structures are…

cond-mat.mes-hall2015★ 2 cited

Current noise of the interacting resonant level model

T. J. Suzuki, D. M. Kennes, V. Meden

We study the zero-frequency current noise of the interacting resonant level model for arbitrary bias voltages using a functional renormalization group approach. For this we extend…

cond-mat.mes-hall2015★ 3 cited

Methodology for bus layout for topological quantum error correcting codes

Martin Wosnitzka, Fabio L. Pedrocchi, David P. DiVincenzo

Most quantum computing architectures can be realized as two-dimensional lattices of qubits that interact with each other. We take transmon qubits and transmission line resonators a…

cond-mat.mes-hall2015★ 109 cited

Realization of a vertical topological p-n junction in epitaxial heterostructures

Markus Eschbach, Ewa Mlynczak, Jens Kellner +17

3D topological insulators are a new state of quantum matter which exhibits both a bulk band structure with an insulating energy gap as well as metallic spin-polarized Dirac fermion…

cond-mat.mes-hall2015★ 43 cited

Thermoelectricity without absorbing energy from the heat sources

Robert. S. Whitney, Rafael Sánchez, Federica Haupt +1

We analyze the power output of a quantum dot machine coupled to two electronic reservoirs via thermoelectric contacts, and to two thermal reservoirs - one hot and one cold. This ma…

cond-mat.mes-hall2015★ 25 cited

Exchange-interaction of two spin qubits mediated by a superconductor

Fabian Hassler, Gianluigi Catelani, Hendrik Bluhm

Entangling two quantum bits by letting them interact is the crucial requirements for building a quantum processor. For qubits based on the spin of the electron, these two-qubit gat…

cond-mat.mes-hall2015★ 13 cited

Second-order coherence of microwave photons emitted by a quantum point contact

Fabian Hassler, Daniel Otten

Shot-noise of electrons that are transmitted with probability through a quantum point contact (biased at a voltage ) leads to a fluctuating current that in turn emits radi…

cond-mat.mes-hall2015★ 8 cited

Back action of graphene charge detectors on graphene and carbon nanotube quantum dots

C. Volk, S. Engels, C. Neumann +1

We report on devices based on graphene charge detectors (CDs) capacitively coupled to graphene and carbon nanotube quantum dots (QDs). We focus on back action effects of the CD on…

cond-mat.mes-hall2015★ 39 cited

Quadrupolar and anisotropy effects on dephasing in two-electron spin qubits in GaAs

Tim Botzem, Robert P. G. McNeil, Dieter Schuh +2

Understanding the decoherence of electron spins in semiconductors due to their interaction with nuclear spins is of fundamental interest as they realize the central spin model and…

cond-mat.mes-hall2015★ 41 cited

Fermion-parity duality and energy relaxation in interacting open systems

J. Schulenborg, R. B. Saptsov, F. Haupt +2

We study the transient heat current out of a confined electron system into a weakly coupled electrode in response to a voltage switch. We show that the decay of the Coulomb interac…

cond-mat.mes-hall2015★ 11 cited

Qubit quantum-dot sensors: noise cancellation by coherent backaction, initial slips, and elliptical precession

M. Hell, M. R. Wegewijs, D. P. DiVincenzo

We theoretically investigate the backaction of a sensor quantum dot with strong local Coulomb repulsion on the transient dynamics of a qubit that is probed capacitively. We show th…

cond-mat.mes-hall2015★ 6 cited

Measurement-induced entanglement of two transmon qubits by a single photon

Christoph Ohm, Fabian Hassler

On-demand creation of entanglement between distant qubits is a necessary ingredient for distributed quantum computation. We propose an entanglement scheme that allows for single-sh…

cond-mat.mes-hall2015★ 11 cited

Simple operation sequences to couple and interchange quantum information between spin qubits of different kinds

Sebastian Mehl, David P. DiVincenzo

Efficient operation sequences to couple and interchange quantum information between quantum dot spin qubits of different kinds are derived using exchange interactions. In the qubit…

cond-mat.mes-hall2015★ 6 cited

Nanosecond spin lifetimes in bottom-up fabricated bilayer graphene spin-valves with atomic layer deposited AlO spin injection and detection barriers

Marc Drögeler, Frank Volmer, Maik Wolter +5

We present spin transport studies on bi- and trilayer graphene non-local spin-valves which have been fabricated by a bottom-up fabrication method. By this technique, spin injection…

cond-mat.mes-hall2015★ 32 cited

Monte Carlo studies of the properties of the Majorana quantum error correction code: is self-correction possible during braiding?

Fabio L. Pedrocchi, N. E. Bonesteel, David P. DiVincenzo

The Majorana code is an example of a stabilizer code where the quantum information is stored in a system supporting well-separated Majorana Bound States (MBSs). We focus on one-dim…

cond-mat.mes-hall2015★ 28 cited

Collective modes in the fluxonium qubit

G. Viola, G. Catelani

Superconducting qubit designs vary in complexity from single- and few-junction systems, such as the transmon and flux qubits, to the many-junction fluxonium. Here we consider the q…

cond-mat.mes-hall2015★ 15 cited

Changing anyonic ground degeneracy with engineered gauge fields

Emilio Cobanera, Jascha Ulrich, Fabian Hassler

For systems of lattice anyons like Majorana and parafermions, the unconventional quantum statistics determines a set of global symmetries (e.g., fermion parity for Majoranas) admit…

cond-mat.mes-hall2015★ 13 cited

Switchable Coupling of Vibrations to Two-Electron Carbon-Nanotube Quantum Dot States

P. Weber, H. L. Calvo, J. Bohle +4

We report transport measurements on a quantum dot in a partly suspended carbon nanotube. Electrostatic tuning allows us to modify and even switch 'on' and 'off' the coupling to the…