FYYSIKA.EE

Elu, loodus, teadus ja tehnoloogia

Mass-Discrepancy Acceleration Relation: A Natural Outcome of Galaxy Formation in Cold Dark Matter Halos

by

Author(s): Aaron D. Ludlow, Alejandro Benítez-Llambay, Matthieu Schaller, Tom Theuns, Carlos S. Frenk, Richard Bower, Joop Schaye, Robert A. Crain, Julio F. Navarro, Azadeh Fattahi, and Kyle A. Oman

Analysis of the acceleration profiles of galaxies identified in simulations of a cold dark matter universe confirms a previous finding that total acceleration correlates strongly with the baryonic acceleration in rotationally supported galaxies.


[Phys. Rev. Lett. 118, 161103] Published Fri Apr 21, 2017

Spin-Hall Voltage over a Large Length Scale in Bulk Germanium

by

Author(s): F. Bottegoni, C. Zucchetti, S. Dal Conte, J. Frigerio, E. Carpene, C. Vergnaud, M. Jamet, G. Isella, F. Ciccacci, G. Cerullo, and M. Finazzi

Germanium produces a surprisingly large separation of electron spins in response to electric current—good news for spin-based devices, since germanium is highly compatible with silicon.


[Phys. Rev. Lett. 118, 167402] Published Fri Apr 21, 2017

Detector-Independent Verification of Quantum Light

by

Author(s): J. Sperling, W. R. Clements, A. Eckstein, M. Moore, J. J. Renema, W. S. Kolthammer, S. W. Nam, A. Lita, T. Gerrits, W. Vogel, G. S. Agarwal, and I. A. Walmsley

Criteria are formulated and experimentally verified for optical measurement schemes that probe nonclassical properties of light and are independent of the detector architecture used.


[Phys. Rev. Lett. 118, 163602] Published Fri Apr 21, 2017

Detector-Independent Verification of Quantum Light

by

Author(s): J. Sperling, W. R. Clements, A. Eckstein, M. Moore, J. J. Renema, W. S. Kolthammer, S. W. Nam, A. Lita, T. Gerrits, W. Vogel, G. S. Agarwal, and I. A. Walmsley

Criteria are formulated and experimentally verified for optical measurement schemes that probe nonclassical properties of light and are independent of the detector architecture used.


[Phys. Rev. Lett. 118, 163602] Published Fri Apr 21, 2017

Read up on climate

by


With tomorrow’s Earth Day focusing on environmental and climate literacy, have a look at the new digital book on our planet’s changing climate through the eyes of satellites

Read up on climate

by


With tomorrow’s Earth Day focusing on environmental and climate literacy, have a look at the new digital book on our planet’s changing climate through the eyes of satellites

Call for a sustainable future in space

by

With more than 750 000 pieces of dangerous debris now orbiting Earth, the urgent need for coordinated international action to ensure the long-term sustainability of spaceflight is a major finding from Europe’s largest-ever conference on space debris.

Call for a sustainable future in space

by

With more than 750 000 pieces of dangerous debris now orbiting Earth, the urgent need for coordinated international action to ensure the long-term sustainability of spaceflight is a major finding from Europe’s largest-ever conference on space debris.

When Swarm met Steve

by

Thanks to social media and the power of citizen scientists chasing the northern lights, a new feature was discovered recently. Nobody knew what this strange ribbon of purple light was, so … it was called Steve.

When Swarm met Steve

by

Thanks to social media and the power of citizen scientists chasing the northern lights, a new feature was discovered recently. Nobody knew what this strange ribbon of purple light was, so … it was called Steve.

Lake MacKay

by


Earth observation image of the week: Australia’s salty Lake MacKay imaged by Sentinel-2, also featured on the Earth from Space video programme

Larsen, cracked

by


Radar mission Sentinel-1 continues to monitor the growing crack in Antarctica’s Larsen-C ice shelf, which is expected to produce a massive iceberg

Larsen, cracked

by


Radar mission Sentinel-1 continues to monitor the growing crack in Antarctica’s Larsen-C ice shelf, which is expected to produce a massive iceberg

Black Hole Spectroscopy with Coherent Mode Stacking

by

Author(s): Huan Yang, Kent Yagi, Jonathan Blackman, Luis Lehner, Vasileios Paschalidis, Frans Pretorius, and Nicolás Yunes

Stacking up gravitational-wave “ringdown” signals from a set of black hole mergers increases the sensitivity of the signals to black hole properties.


[Phys. Rev. Lett. 118, 161101] Published Thu Apr 20, 2017

Black Hole Spectroscopy with Coherent Mode Stacking

by

Author(s): Huan Yang, Kent Yagi, Jonathan Blackman, Luis Lehner, Vasileios Paschalidis, Frans Pretorius, and Nicolás Yunes

Stacking up gravitational-wave “ringdown” signals from a set of black hole mergers increases the sensitivity of the signals to black hole properties.


[Phys. Rev. Lett. 118, 161101] Published Thu Apr 20, 2017

Run-away debris

by

Operations image of the week: Space debris researcher Don Kessler first described the run-away cascade effect that has made his name famous

Mountain oasis

by


Technology image of the week: the vivid blue of a mountain reservoir imaged by Proba-1, ESA’s oldest operational Earth-observing satellite

Fotokonkurss: mis on füüsika?

by

Keemial on katseklaasid, bioloogial DNA, aga mis sümboliseerib füüsikat? Et leida vastus nii tähtsale küsimusele, otsustasid füüsikatudengid välja kuulutada fotokonkurssi. Ootame teilt pilte, mis annaks edasi füüsika ilu – just nii nagu teie seda näete. Pilte saab saata emaili aadressile fyselts@gmail.com kuni 30. aprillini. Kirjale palume lisada oma täisnime ning soovi korral ka pealkirja. Kõik pildid lähevad […]

Neutron Generation by Laser-Driven Spherically Convergent Plasma Fusion

by

Author(s): G. Ren, J. Yan, J. Liu, K. Lan, Y. H. Chen, W. Y. Huo, Z. Fan, X. Zhang, J. Zheng, Z. Chen, W. Jiang, L. Chen, Q. Tang, Z. Yuan, F. Wang, S. Jiang, Y. Ding, W. Zhang, and X. T. He

A new laser-driven fusion method could lead to a robust and efficient way to generate neutrons for use in materials science, geology, and other fields.


[Phys. Rev. Lett. 118, 165001] Published Wed Apr 19, 2017

Environmentally Mediated Coherent Control of a Spin Qubit in Diamond

by

Author(s): Scott E. Lillie, David A. Broadway, James D. A. Wood, David A. Simpson, Alastair Stacey, Jean-Philippe Tetienne, and Lloyd C. L. Hollenberg

The state of a diamond nitrogen-vacancy spin qubit is controlled by resonances with neighboring spins, offering a new way to control spin qubits.


[Phys. Rev. Lett. 118, 167204] Published Wed Apr 19, 2017

Environmentally Mediated Coherent Control of a Spin Qubit in Diamond

by

Author(s): Scott E. Lillie, David A. Broadway, James D. A. Wood, David A. Simpson, Alastair Stacey, Jean-Philippe Tetienne, and Lloyd C. L. Hollenberg

The state of a diamond nitrogen-vacancy spin qubit is controlled by resonances with neighboring spins, offering a new way to control spin qubits.


[Phys. Rev. Lett. 118, 167204] Published Wed Apr 19, 2017

Neutron Generation by Laser-Driven Spherically Convergent Plasma Fusion

by

Author(s): G. Ren, J. Yan, J. Liu, K. Lan, Y. H. Chen, W. Y. Huo, Z. Fan, X. Zhang, J. Zheng, Z. Chen, W. Jiang, L. Chen, Q. Tang, Z. Yuan, F. Wang, S. Jiang, Y. Ding, W. Zhang, and X. T. He

A new laser-driven fusion method could lead to a robust and efficient way to generate neutrons for use in materials science, geology, and other fields.


[Phys. Rev. Lett. 118, 165001] Published Wed Apr 19, 2017

Eesti teadlaste töö jõudis maailma mainekaimasse füüsikaajakirja Physical Review Letters

by

Tartu Ülikooli ning Keemilise ja Bioloogilise Füüsika Instituudi teoreetikute artikkel selgitas ülivarajase universumi mudelite klassifikatsiooni ning ilmus ajakirja 14. aprilli numbris. Artikli autorid on Laur Järv, Mihkel Rünkla ja Margus Saal Tartu Ülikooli füüsikainstituudi teoreetilise füüsika laborist ning Kristjan Kannike, Luca Marzola, Antonio Racioppi, Martti Raidal ja Hardi Veermäe Keemilise ja Bioloogilise Füüsika Instituudi kõrgete […]

TÜ Teaduskool kutsub kõiki 8.-12. klassi õpilasi osa võtma veebipõhisest füüsikaviktoriinist SPEKTER!

by

Füüsikaviktoriin toimub 3. mail 2017 ajavahemikus kl 8:00 kuni 20:00 füüsika e-õpiku veebikeskkonnas ja viiakse läbi kahes vanuserühmas (8.-9. klass ja 10.-12. klass) ning kahes keeles (eesti ja vene). Osaleda võivad ka nooremate klasside füüsikahuvilised. Viktoriinist osavõtt on tasuta ja eelnevalt registreerima ei pea. Viktoriini korraldab TÜ teaduskool koostöös TÜ koolifüüsika keskuse ja Eesti Füüsika […]

Journey to Earth

by

A voyage from outer space to our home planet highlights the challenges of space debris and how mitigation and removal measures are urgently required

Journey to Earth

by

A voyage from outer space to our home planet highlights the challenges of space debris and how mitigation and removal measures are urgently required

Lights out

by

Science Image of the Week: The James Webb Space Telescope undergoing a special inspection in the dark

Atom Interferometry in a Warm Vapor

by

Author(s): G. W. Biedermann, H. J. McGuinness, A. V. Rakholia, Y.-Y. Jau, D. R. Wheeler, J. D. Sterk, and G. R. Burns

Researchers have demonstrated an atom interferometer based on a warm vapor, rather than on a cold atomic gas.


[Phys. Rev. Lett. 118, 163601] Published Mon Apr 17, 2017

Topological Subspace-Induced Bound State in the Continuum

by

Author(s): Yi-Xin Xiao, Guancong Ma, Zhao-Qing Zhang, and C. T. Chan

A new theory shows that symmetry-protected topological properties can survive in a system when the symmetry is broken, something that was previously thought to be impossible.


[Phys. Rev. Lett. 118, 166803] Published Mon Apr 17, 2017

Atom Interferometry in a Warm Vapor

by

Author(s): G. W. Biedermann, H. J. McGuinness, A. V. Rakholia, Y.-Y. Jau, D. R. Wheeler, J. D. Sterk, and G. R. Burns

Researchers have demonstrated an atom interferometer based on a warm vapor, rather than on a cold atomic gas.


[Phys. Rev. Lett. 118, 163601] Published Mon Apr 17, 2017

Topological Subspace-Induced Bound State in the Continuum

by

Author(s): Yi-Xin Xiao, Guancong Ma, Zhao-Qing Zhang, and C. T. Chan

A new theory shows that symmetry-protected topological properties can survive in a system when the symmetry is broken, something that was previously thought to be impossible.


[Phys. Rev. Lett. 118, 166803] Published Mon Apr 17, 2017

Nonlinear Rheology in a Model Biological Tissue

by

Author(s): D. A. Matoz-Fernandez, Elisabeth Agoritsas, Jean-Louis Barrat, Eric Bertin, and Kirsten Martens

A new model is developed to describe the crossover from linear to non-linear rheology in flowing active tissues. The model is based on stress fluctuations mediated by long-range elastic interactions.


[Phys. Rev. Lett. 118, 158105] Published Fri Apr 14, 2017

Nonlinear Rheology in a Model Biological Tissue

by

Author(s): D. A. Matoz-Fernandez, Elisabeth Agoritsas, Jean-Louis Barrat, Eric Bertin, and Kirsten Martens

A new model is developed to describe the crossover from linear to non-linear rheology in flowing active tissues. The model is based on stress fluctuations mediated by long-range elastic interactions.


[Phys. Rev. Lett. 118, 158105] Published Fri Apr 14, 2017

Nonlinear Rheology in a Model Biological Tissue

by

Author(s): D. A. Matoz-Fernandez, Elisabeth Agoritsas, Jean-Louis Barrat, Eric Bertin, and Kirsten Martens

A new model is developed to describe the crossover from linear to non-linear rheology in flowing active tissues. The model is based on stress fluctuations mediated by long-range elastic interactions.


[Phys. Rev. Lett. 118, 158105] Published Fri Apr 14, 2017

Nonlinear Rheology in a Model Biological Tissue

by

Author(s): D. A. Matoz-Fernandez, Elisabeth Agoritsas, Jean-Louis Barrat, Eric Bertin, and Kirsten Martens

A new model is developed to describe the crossover from linear to non-linear rheology in flowing active tissues. The model is based on stress fluctuations mediated by long-range elastic interactions.


[Phys. Rev. Lett. 118, 158105] Published Fri Apr 14, 2017