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  • Article | | open

    The challenge of transmitting noise-free quantum optical signals needs to be overcome before they can be readily applied to quantum communication devices. The authors present a method using standard components to amplify quantum optical signals while reducing the effects of noise and maintain a high-quality, secure signal.

    • Ross J. Donaldson
    • , Luca Mazzarella
    • , Robert J. Collins
    • , John Jeffers
    •  & Gerald S. Buller
  • Article | | open

    An extreme-mass-ratio inspiral, generally consists of a stellar-mass black hole and a supermassive black hole. The authors propose an alternative scenario where the small black hole is replaced by a binary black hole, and show how likely their gravitation wave signal can be detected, simultaneously, by LISA and LIGO.

    • Xian Chen
    •  & Wen-Biao Han
  • Article | | open

    The continue advancement in accelerators instrumentation is placing increasingly stringent requirements on the measure of beam sizes. The paper discusses the development of an electron beam diagnostics for measuring sub-micron beam sizes, opening the window to sub-micrometre resolution.

    • Simona Borrelli
    • , Gian Luca Orlandi
    • , Martin Bednarzik
    • , Christian David
    • , Eugenio Ferrari
    • , Vitaliy A. Guzenko
    • , Cigdem Ozkan-Loch
    • , Eduard Prat
    •  & Rasmus Ischebeck
  • Article | | open

    Spin waves are promising candidates as a building block for future magnonic devices. The authors present a combined numerical and experimental study of spin-wave interferences in stacks of magnetic vortices that are efficient spin-wave emitters in the nanometre regime.

    • Carolin Behncke
    • , Christian F. Adolff
    • , Nicolas Lenzing
    • , Max Hänze
    • , Benedikt Schulte
    • , Markus Weigand
    • , Gisela Schütz
    •  & Guido Meier
  • Article | | open

    Optical frequency combs are important technology used in physics to distinguish between waves of different frequency. The authors have demonstrated experimentally and theoretically that quantum coherence of single photons with frequency comb characteristics can be induced by erasing which-path information of a pair of entangled photons.

    • Sun Kyung Lee
    • , Noh Soo Han
    • , Tai Hyun Yoon
    •  & Minhaeng Cho
  • Article | | open

    Polar semiconductor nanostructures are important for a range of electro-optical applications such as quantum information technology. The authors experimentally demonstrate an unconventional semiconductor design called an internal field guarded active region design (IFGARD) that can suppress unwanted secondary effects caused by polarity and improve device performance.

    • S. Schlichting
    • , G. M. O. Hönig
    • , J. Müßener
    • , P. Hille
    • , T. Grieb
    • , S. Westerkamp
    • , J. Teubert
    • , J. Schörmann
    • , M. R. Wagner
    • , A. Rosenauer
    • , M. Eickhoff
    • , A. Hoffmann
    •  & G. Callsen
  • Article | | open

    One of the oldest problems in elementary quantum mechanics, the exact time that it takes for a particle to tunnel, remains an open question. This paper is devoted to the tunnelling time problem and shows that the accurate measurement of the duration spent in the barrier is not possible without destroying the interference which creates the tunnelled wave packet

    • D. Sokolovski
    •  & E. Akhmatskaya
  • Article | | open

    In recent years, photonic structures that mediate the transfer of energy from a laser to a particle beam have gained interest as a way to access more compact accelerations techniques for use in a wide variety of applications. The authors investigate by numerical calculations and experimentally the effect of nonlinear pulse distortions on the operation of dielectric laser accelerators.

    • D. Cesar
    • , S. Custodio
    • , J. Maxson
    • , P. Musumeci
    • , X. Shen
    • , E. Threlkeld
    • , R. J. England
    • , A. Hanuka
    • , I. V. Makasyuk
    • , E. A. Peralta
    • , K. P. Wootton
    •  & Z. Wu
  • Article | | open

    The relationship between superconductivity and charge density waves is one of the unresolved mysteries of high temperature cuprate superconductors. The authors investigate this relationship using multilayers of cuprates and manganites for which the charge and orbital order of the latter is controlled by chemical substitution.

    • E. Perret
    • , C. Monney
    • , S. Johnston
    • , J. Khmaladze
    • , F. Lyzwa
    • , R. Gaina
    • , M. Dantz
    • , J. Pelliciari
    • , C. Piamonteze
    • , B. P. P. Mallett
    • , M. Minola
    • , B. Keimer
    • , T. Schmitt
    •  & C. Bernhard
  • Article | | open

    Adhesion plays an essential role in a large variety of processes in different fields. In this study, graphene nanoscrolls and pristine graphene are studied and compared, finding that the former presents significantly enhanced adhesion properties.

    • Hu Li
    • , Raffaello Papadakis
    • , S. Hassan. M. Jafri
    • , Thomas Thersleff
    • , Johann Michler
    • , Henrik Ottosson
    •  & Klaus Leifer
  • Article | | open

    Femtosecond lasers are used for a vast variety of applications where super resolution is required. The authors present gain-switched semiconductor-laser operations using an extreme optical pump allowing them to generate ultrashort, high power pulses.

    • Takashi Ito
    • , Hidekazu Nakamae
    • , Yuji Hazama
    • , Takahiro Nakamura
    • , Shaoqiang Chen
    • , Masahiro Yoshita
    • , Changsu Kim
    • , Yohei Kobayashi
    •  & Hidefumi Akiyama
  • Article | | open

    An understanding of the interlayer electronic interactions in two dimensional heterostructures is required to advance their potential applications in low-power electronics. The authors develop a transport theory incorporating charge inhomogeneities in order to explain the behavior of Coulomb drag observed experimentally in double layer heterostructures.

    • Derek Y. H. Ho
    • , Indra Yudhistira
    • , Ben Yu-Kuang Hu
    •  & Shaffique Adam
  • Article | | open

    Systems which sustain quasiparticle complexes can exhibit unique optical features and unusual physical properties. Here the authors investigate highly doped bulk semiconductors and provide experimental evidence to suggest a new type of neutral, degenerate electron gas-stabilized quasiparticle which they term a collexon.

    • C. Nenstiel
    • , G. Callsen
    • , F. Nippert
    • , T. Kure
    • , S. Schlichting
    • , N. Jankowski
    • , M. P. Hoffmann
    • , A. Dadgar
    • , S. Fritze
    • , A. Krost
    • , M. R. Wagner
    • , A. Hoffmann
    •  & F. Bechstedt
  • Article | | open

    There are many different types of superconducting phases each with unique properties and mechanisms behind their superconductivity. The authors investigate a type of superconductor called an Ising superconductor and demonstrate that by application of a magnetic field they can be driven into a nodal superconducting phase.

    • Wen-Yu He
    • , Benjamin T. Zhou
    • , James J. He
    • , Noah F. Q. Yuan
    • , Ting Zhang
    •  & K. T. Law
  • Article | | open

    The discovery of topological insulators has given rise to a flourishing field dedicated to the investigation of the topological state of matter. This manuscript contributes to this field by introducing the idea of a topoelectrical circuit, whereby an assembly of conventional circuit elements realises various topological band structures.

    • Ching Hua Lee
    • , Stefan Imhof
    • , Christian Berger
    • , Florian Bayer
    • , Johannes Brehm
    • , Laurens W. Molenkamp
    • , Tobias Kiessling
    •  & Ronny Thomale
  • Article | | open

    Organic field-effect transistors are expected to become a key component of future integrated circuits. The authors seek to improve the performance of devices based on these materials by investigating the effect of flicker noise in a solution-processed organic single crystal transistor.

    • Shun Watanabe
    • , Hirotaka Sugawara
    • , Roger Häusermann
    • , Balthasar Blülle
    • , Akifumi Yamamura
    • , Toshihiro Okamoto
    •  & Jun Takeya
  • Article | | open

    The way many natural surfaces transport water has been a fascinating subject for many centuries. The paper presents an experimental and theoretical investigation of droplets transport on the peristome of pitcher plants and shows that this depends on the multiscale structures of both the surface and the water.

    • Jiaqian Li
    • , Huanxi Zheng
    • , Zhengbao Yang
    •  & Zuankai Wang
  • Article | | open

    Fourier transform spectroscopy has been effective in overcoming detector noise for both analytical and applied scientific disciplines. The authors present a modification of a stationary Fourier transform spectrometer that efficiently utilizes imaging detectors to improve the measured spectral resolution of broadband optical signals

    • Brandon Hong
    • , Faraz Monifi
    •  & Yeshaiahu Fainman
  • Article | | open

    Cold and ultracold atomic gases can be used as simulators in order to analyse classical and quantum features of exotic magnetic phenomena. By applying an external magnetic field to a cold atomic gas in a self-organised optical lattice the authors demonstrate transitions between different magnetic phases via optically mediated spin-spin interactions.

    • I. Krešić
    • , G. Labeyrie
    • , G. R. M. Robb
    • , G.-L. Oppo
    • , P. M. Gomes
    • , P. Griffin
    • , R. Kaiser
    •  & T. Ackemann
  • Article | | open

    Skyrmions are magnetic topological features which are expected to play an important role in future data storage and information processing devices. The authors outline a theoretical method to calculate the size and wall width of an isolated skyrmion.

    • X. S. Wang
    • , H. Y. Yuan
    •  & X. R. Wang
  • Article | | open

    Ultracold atoms serve as ideal systems for precise studies of light-matter interaction. The authors report on absolute strong-field ionization probabilities of rubidium atoms exposed to femtosecond laser pulses and show that Ab-initio theory is in perfect agreement with the data at Keldysh parameters near unity.

    • Philipp Wessels
    • , Bernhard Ruff
    • , Tobias Kroker
    • , Andrey K. Kazansky
    • , Nikolay M. Kabachnik
    • , Klaus Sengstock
    • , Markus Drescher
    •  & Juliette Simonet
  • Article | | open

    Motile cilia are organelles found in eukaryotic cells and serve to swim or generate surface flows. The paper presents a theoretical and experimental study showing the systematic link between synchronisation state and the beating motion of active biological filaments.

    • Armando Maestro
    • , Nicolas Bruot
    • , Jurij Kotar
    • , Nariya Uchida
    • , Ramin Golestanian
    •  & Pietro Cicuta
  • Article | | open

    The compound NbSe2 has been the subject of considerable interest because of its unusual electronic behaviour, making it a prototypical material for understanding exotic phenomena. By tilting  the magnetic field the authors are able to more clearly analyse features of its electronic structure at the surface of NbSe2 using scanning tunnelling microscopy.

    • J. A. Galvis
    • , E. Herrera
    • , C. Berthod
    • , S. Vieira
    • , I. Guillamón
    •  & H. Suderow
  • Article | | open

    Ramsey interferometers are used as a general tool of spectroscopy and matter wave interferometry. The authors demonstrate an echo- Ramsey interferometer that uses trapped quantum states in an optical lattice as a new tool to study coherence in many body quantum systems.

    • Dong Hu
    • , Linxiao Niu
    • , Shengjie Jin
    • , Xuzong Chen
    • , Guangjiong Dong
    • , Jörg Schmiedmayer
    •  & Xiaoji Zhou
  • Article | | open

    Organic solar cells with small molecule acceptors achieve promising high efficiencies. The authors use numerical simulations to explain under which circumstances complementary absorption or overlapping absorption bands of the donor and non-fullerene acceptor molecules will be more beneficial for efficiency.

    • Lisa Krückemeier
    • , Pascal Kaienburg
    • , Jan Flohre
    • , Karsten Bittkau
    • , Irene Zonno
    • , Benedikt Krogmeier
    •  & Thomas Kirchartz
  • Article | | open

    Non-equilibrium dynamics of cold atoms have recently attracted attention revealing unconventional phenomena. The authors report here the experimental observation of a non-equilibrium steady state in a hybrid trap composed of a magneto-optical trap and a moving optical lattice.

    • Kyeong Ock Chong
    • , Jung-Ryul Kim
    • , Jinuk Kim
    • , Seokchan Yoon
    • , Sungsam Kang
    •  & Kyungwon An
  • Article | | open

    Characterizing the non-equilibrium phase transition to a Bose-Einstein condensate is an open problem in condensed matter physics. The authors perform a detailed numerical characterization of this dynamical process, providing insights into the equilibration process after crossing the transition.

    • I.-K. Liu
    • , S. Donadello
    • , G. Lamporesi
    • , G. Ferrari
    • , S.-C. Gou
    • , F. Dalfovo
    •  & N. P. Proukakis
  • Article | | open

    Formation of stable coherent structures is a fundamental physical phenomenon that occurs in various systems. This paper presents dissipative soliton build-up in mode-locked fibre lasers and investigate spectral and temporal evolution observing nonlinear dynamics ahead of the formation of a stable dissipative soliton.

    • Junsong Peng
    • , Mariia Sorokina
    • , Srikanth Sugavanam
    • , Nikita Tarasov
    • , Dmitry V. Churkin
    • , Sergei K. Turitsyn
    •  & Heping Zeng
  • Article | | open

    A better understanding of heat-transfer mechanisms is essential to designing more efficient cooling systems for high-energy devices. Using a micron-sized hot-spot, the authors investigate the dynamics of the nucleation and growth of a single vapour bubble from the micro to nanoscale.

    • Mehrdad Mehrvand
    •  & Shawn A. Putnam
  • Article | | open

    Ultrasound-driven encapsulated microbubbles show great promise as convenient transport vehicles for local drug delivery. This manuscript reports the development of a theoretical framework validated by experiments for understanding the role of non-spherical oscillations in ultrasound-mediated release of a drug payload from targeted microbubbles.

    • Guillaume Lajoinie
    • , Ying Luan
    • , Erik Gelderblom
    • , Benjamin Dollet
    • , Frits Mastik
    • , Heleen Dewitte
    • , Ine Lentacker
    • , Nico de Jong
    •  & Michel Versluis
  • Article | | open

    Plasma Raman amplifiers have been proposed as a mean to increase laser intensity beyond what is currently possible with solid state devices. The paper presents a counterintuitive geometry for a Raman amplifier that allows to optimize the Raman amplification of a seed pulse in a plasma.

    • James D. Sadler
    • , Luís O. Silva
    • , Ricardo A. Fonseca
    • , Kevin Glize
    • , Muhammad F. Kasim
    • , Alex Savin
    • , Ramy Aboushelbaya
    • , Marko W. Mayr
    • , Benjamin Spiers
    • , Robin H. W. Wang
    • , Robert Bingham
    • , Raoul M. G. M. Trines
    •  & Peter A. Norreys
  • Article | | open

    Frequency combs correspond to optical spectra composed of a succession of equally spaced lines that can be used in numerous fields such as high-precision spectroscopy. The authors report a new way of converting frequency combs in the mid-infrared region, which has potential applications in molecular spectroscopy and gas sensing.

    • Alexandre Parriaux
    • , Kamal Hammani
    •  & Guy Millot
  • Article | | open

    Understanding the magnetic properties of molecules at the atomic level is a crucial aspect in the growing area of organic spintronics. This study brings further insight into the mechanisms of electron-spin interactions by investigating an iron-based organic molecule deposited on gold substrates.

    • Carmen Rubio-Verdú
    • , Ane Sarasola
    • , Deung-Jang Choi
    • , Zsolt Majzik
    • , René Ebeling
    • , M. Reyes Calvo
    • , Miguel M. Ugeda
    • , Aran Garcia-Lekue
    • , Daniel Sánchez-Portal
    •  & Jose Ignacio Pascual
  • Article | | open

    In order to develop the next generation of semiconductor devices it is important to better understand the fundamental physics of materials other than silicon. The authors develop a theoretical approach to describe the charge transport properties of polymer-based semiconductors by focusing on features related to their crystallographic properties.

    • M. Statz
    • , D. Venkateshvaran
    • , X. Jiao
    • , S. Schott
    • , C. R. McNeill
    • , D. Emin
    • , H. Sirringhaus
    •  & R. Di Pietro
  • Article | | open

    Photoemission from nanostructures has raised considerable interest in recent years. The authors propose a low-budget scheme for multiphoton photemission with a continuous-wave laser that may inspire design of accessible nanoscale coherent electron sources.

    • Murat Sivis
    • , Nicolas Pazos-Perez
    • , Renwen Yu
    • , Ramon Alvarez-Puebla
    • , F. Javier García de Abajo
    •  & Claus Ropers
  • Article | | open

    Since the Renaissance, the Reiner Gamma formation was identified as a peculiar lunar feature. By combining magnetic field topology based on satellite observations with a full-kinetic plasma model, the authors successfully reproduced the shape of the surface albedo pattern beneath the magnetic anomaly.

    • Jan Deca
    • , Andrey Divin
    • , Charles Lue
    • , Tara Ahmadi
    •  & Mihály Horányi
  • Article | | open

    The study provides new insight into the light-matter interactions of organic based perovskites. The authors do so by investigating the hybrid perovskite methylammonium lead iodide, which is considered a benchmark material for solar cells with high power conversion efficiency.

    • Petr A. Obraztsov
    • , Dmitry Lyashenko
    • , Pavel A. Chizhov
    • , Kuniaki Konishi
    • , Natsuki Nemoto
    • , Makoto Kuwata-Gonokami
    • , Eric Welch
    • , Alexander N. Obraztsov
    •  & Alex Zakhidov
  • Article | | open

    Dimension is an important resource in quantum information theory. By exploiting the weak measurement technique, the paper presents a three-observer dimension witness protocol which can be applied, among other protocols, in semi device-independent quantum information theory.

    • Hong-Wei Li
    • , Yong-Sheng Zhang
    • , Xue-Bi An
    • , Zheng-Fu Han
    •  & Guang-Can Guo
  • Article | | open

    A first-principles description of electronic states in cuprate high-temperature superconductors has remained a longstanding challenge in the field. The authors show how the equilibrium crystal structure as well as the key ground-state electronic and magnetic properties of lanthanum cuprate superconductor as an exemplar correlated material can be obtained accurately by applying an advanced functional within the framework of the density functional theory.

    • James W. Furness
    • , Yubo Zhang
    • , Christopher Lane
    • , Ioana Gianina Buda
    • , Bernardo Barbiellini
    • , Robert S. Markiewicz
    • , Arun Bansil
    •  & Jianwei Sun
  • Article | | open

    The paper reports a theoretical investigation of the paramagnetic states of monolayer FeSe. The authors use first-principles spin-spiral calculations to show that spin fluctuations around the checkerboard states explain the paradox between angle-resolved photoemission experiments and density-functional theory.

    • T. Shishidou
    • , D. F. Agterberg
    •  & M. Weinert
  • Article | | open

    Intermediate band photovoltaics have the potential to increase traditional solar cell efficiencies by placing an intermediate band energy level between the valence and conduction bands, but they suffer from short carrier lifetimes because of Shockley-Read Hall recombination. The Quantum Ratchet device, whose concept was proposed theoretically as a way to increase the intermediate band life time, is realised here with a semiconductor nanostructure.

    • Anthony Vaquero-Stainer
    • , Megumi Yoshida
    • , Nicholas P. Hylton
    • , Andreas Pusch
    • , Oliver Curtin
    • , Mark Frogley
    • , Thomas Wilson
    • , Edmund Clarke
    • , Kenneth Kennedy
    • , Nicholas J. Ekins-Daukes
    • , Ortwin Hess
    •  & Chris C. Phillips
  • Article | | open

    Phase change alloys are used as components for optical data storage like DVD and Blue-Ray disks but many of their conductive properties are only known phenomenologically. This paper reports detailed band structure mapping of the prototype alloy GST-225 using photoemission spectroscopy, and the observation of a Dirac-like surface state above the Fermi level.

    • J. Kellner
    • , G. Bihlmayer
    • , M. Liebmann
    • , S. Otto
    • , C. Pauly
    • , J. E. Boschker
    • , V. Bragaglia
    • , S. Cecchi
    • , R. N. Wang
    • , V. L. Deringer
    • , P. Küppers
    • , P. Bhaskar
    • , E. Golias
    • , J. Sánchez-Barriga
    • , R. Dronskowski
    • , T. Fauster
    • , O. Rader
    • , R. Calarco
    •  & M. Morgenstern
  • Article | | open

    Multifractality is ubiquitous in classical systems but rare in quantum ones. Here the authors present observations demonstrating that universal conductance fluctuations in high-mobility single-layer graphene field-effect transistors are multifractal and may arise from Anderson-localization.

    • Kazi Rafsanjani Amin
    • , Samriddhi Sankar Ray
    • , Nairita Pal
    • , Rahul Pandit
    •  & Aveek Bid
  • Article | | open

    Topological insulators insulate in the bulk but exhibit conducting edge states. The study introduces a colloidal analogue of topological insulators and experimentally demonstrates the occurrence of edge states that allow for the transport of colloids along both the edges and the corners of the underlying magnetic lattice.

    • Johannes Loehr
    • , Daniel de las Heras
    • , Adam Jarosz
    • , Maciej Urbaniak
    • , Feliks Stobiecki
    • , Andreea Tomita
    • , Rico Huhnstock
    • , Iris Koch
    • , Arno Ehresmann
    • , Dennis Holzinger
    •  & Thomas M. Fischer