| 1. |
- Agarwal, Girish, et al.
(författare)
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Light, the universe and everything-12 Herculean tasks for quantum cowboys and black diamond skiers
- 2018
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Ingår i: Journal of Modern Optics. - : Informa UK Limited. - 0950-0340 .- 1362-3044. ; 65:11, s. 1261-1308
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Tidskriftsartikel (refereegranskat)abstract
- The Winter Colloquium on the Physics of Quantum Electronics (PQE) has been a seminal force in quantum optics and related areas since 1971. It is rather mind-boggling to recognize how the concepts presented at these conferences have transformed scientific understanding and human society. In January 2017, the participants of PQE were asked to consider the equally important prospects for the future, and to formulate a set of questions representing some of the greatest aspirations in this broad field. The result is this multi-authored paper, in which many of the world's leading experts address the following fundamental questions: (1) What is the future of gravitational wave astronomy? (2) Are there new quantum phases of matter away from equilibrium that can be found and exploited - such as the time crystal? (3) Quantum theory in uncharted territory: What can we learn? (4) What are the ultimate limits for laser photon energies? (5) What are the ultimate limits to temporal, spatial and optical resolution? (6) What novel roles will atoms play in technology? (7) What applications lie ahead for nitrogen-vacancy centres in diamond? (8) What is the future of quantum coherence, squeezing and entanglement for enhanced super-resolution and sensing? (9) How can we solve (some of) humanity's biggest problems through new quantum technologies? (10) What new understanding of materials and biological molecules will result from their dynamical characterization with free-electron lasers? (11) What new technologies and fundamental discoveries might quantum optics achieve by the end of this century? (12) What novel topological structures can be created and employed in quantum optics?
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| 2. |
- Alexander, Gerianne, et al.
(författare)
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The sounds of science-a symphony for many instruments and voices
- 2020
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Ingår i: Physica Scripta. - : IOP Publishing. - 0031-8949 .- 1402-4896. ; 95:6
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Tidskriftsartikel (refereegranskat)abstract
- Sounds of Science is the first movement of a symphony for many (scientific) instruments and voices, united in celebration of the frontiers of science and intended for a general audience. John Goodenough, the maestro who transformed energy usage and technology through the invention of the lithium-ion battery, opens the programme, reflecting on the ultimate limits of battery technology. This applied theme continues through the subsequent pieces on energy-related topics-the sodium-ion battery and artificial fuels, by Martin Mansson-and the ultimate challenge for 3D printing, the eventual production of life, by Anthony Atala. A passage by Gerianne Alexander follows, contemplating a related issue: How might an artificially produced human being behave? Next comes a consideration of consciousness and free will by Roland Allen and Suzy Lidstrom. Further voices and new instruments enter as Warwick Bowen, Nicolas Mauranyapin and Lars Madsen discuss whether dynamical processes of single molecules might be observed in their native state. The exploitation of chaos in science and technology, applications of Bose-Einstein condensates and the significance of entropy follow in pieces by Linda Reichl, Ernst Rasel and Roland Allen, respectively. Mikhail Katsnelson and Eugene Koonin then discuss the potential generalisation of thermodynamic concepts in the context of biological evolution. Entering with the music of the cosmos, Philip Yasskin discusses whether we might be able to observe torsion in the geometry of the Universe. The crescendo comes with the crisis of singularities, their nature and whether they can be resolved through quantum effects, in the composition of Alan Coley. The climax is Mario Krenn, Art Melvin and Anton Zeilinger's consideration of how computer code can be autonomously surprising and creative. In a harmonious counterpoint, his 'Guidelines for considering AIs as coauthors', Roman Yampolskiy concludes that code is not yet able to take responsibility for coauthoring a paper. An interlude summarises a speech by Zdenek Papousek. In a subsequent movement, new themes emerge as we seek to comprehend how far we have travelled along the path to understanding, and speculate on where new physics might arise. Who would have imagined, 100 years ago, a global society permeated by smartphones and scientific instruments so sophisticated that genes can be modified and gravitational waves detected?
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| 3. |
- HARTMANN, O, et al.
(författare)
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MU-SR STUDY OF CHARGE NEUTRALLY DOPED Y1-2XCAXTHXBA2CU3O7-DELTA
- 1994
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Ingår i: PHYSICA C. - : ELSEVIER SCIENCE BV. - 0921-4534. ; 235, s. 1695-1696
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Muon spin relaxation measurements were performed on the Y1-2xCaxThxBa2Cu3O7-delta system covering the solubility range for doping in the orthorhombic phase. The low temperature relaxation rate was found to decrease with CaTh concentration in the dilute ra
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| 4. |
- Lundqvist, P, et al.
(författare)
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mu SR study of charge neutrally doped RE(1-2X)Ca(X)Pr(X)Ba(2)Cu(3)O(7-delta) (RE=Y, Nd)
- 1996
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Ingår i: CZECHOSLOVAK JOURNAL OF PHYSICS. - : CZECHOSLOVAK JNL OF PHYSICS. - 0011-4626. ; 46, s. 1141-1142
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Pr substitution in the 123 superconductors lowers the critical temperature, T-c, drastically. Equal amounts of Ca and Pr were doped into the RE(1-2x)Ca(x)Pr(x)Ba(2)Cu(3)O(7-delta) superconductors (RE=Y, x less than or equal to 0.2 and Nd, x less than or e
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| 5. |
- Mereaux, JL, et al.
(författare)
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Increasing involvement of CAPN1 variants in spastic ataxias and phenotype-genotype correlations
- 2021
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Ingår i: Neurogenetics. - : Springer Science and Business Media LLC. - 1364-6753 .- 1364-6745. ; 22:1, s. 71-79
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Tidskriftsartikel (refereegranskat)abstract
- Spastic ataxias are rare neurogenetic disorders involving spinocerebellar and pyramidal tracts. Many genes are involved. Among them, CAPN1, when mutated, is responsible for a complex inherited form of spastic paraplegia (SPG76). We report the largest published series of 21 novel patients with nine new CAPN1 disease-causing variants and their clinical characteristics from two European university hospitals (Paris and Stockholm). After a formal clinical examination, causative variants were identified by next-generation sequencing and confirmed by Sanger sequencing. CAPN1 variants are a rare cause (~ 1.4%) of young-adult-onset spastic ataxia; however, together with all published cases, they allowed us to better describe the clinical and genetic spectra of this form. Truncating variants are the most frequent, and missense variants lead to earlier age at onset in favor of an additional deleterious effect. Cerebellar ataxia with cerebellar atrophy, dysarthria and lower limb weakness are often associated with spasticity. We also suggest that cognitive impairment and depression should be assessed specifically in the follow-up of SPG76 cases.
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| 6. |
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| 7. |
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| 8. |
- Hartmann, O, et al.
(författare)
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Ferromagnetic erbium studied by mu SR
- 1997
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Ingår i: HYPERFINE INTERACTIONS. - : BALTZER SCI PUBL BV. - 0304-3843. ; 104:1-4, s. 293-299
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The ferromagnetic cone phase of erbium has been studied with mu SR. Two precessing muon signals were observed with nearly equal intensities at T approximate to 15 K. At lower temperatures, one of the signals is gradually reduced and disappeared below 5 K.
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| 9. |
- Hartmann, O, et al.
(författare)
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Trapping of positive muons in molybdenum
- 1995
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Ingår i: JOURNAL OF ALLOYS AND COMPOUNDS. - : ELSEVIER SCIENCE SA LAUSANNE. ; 231:1-2, s. 252-254
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Diffusion and trapping of positive muons in pure Mo and in Mo doped with Nb has been studied. The intrinsic muon jump rate is fast on the mu SR timescale, and is only indirectly observed through trapping and release from impurities. With the Nb doping it
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| 10. |
- KARLSSON, E, et al.
(författare)
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QUANTUM DIFFUSION AND LOCALIZATION OF POSITIVE MUONS IN SUPERCONDUCTING ALUMINUM
- 1995
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Ingår i: PHYSICAL REVIEW B-CONDENSED MATTER. - : AMER INST PHYSICS. - 0163-1829. ; 52:9, s. 6417-6423
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Large differences were observed, indicating that the diffusion mechanism depends sensitively on the interaction between the muon and the conduction electrons. The samples were high-purity aluminum doped with controlled amounts of lithium. The lithium impu
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