Abstract：
:Particle physicists see neutrons as tiny massive particles with a confinement radius of about 0.7 fm and a distinct internal quark gluon structure. In quantum mechanics, neutrons are described by wave packets whose spatial extent may become ten orders of magnitude larger than the confinement radius, and can even reach macroscopic dimensions, depending on the degree of monochromaticity. For neutrons passing through narrow slits, it has been predicted that quantization of the transverse momentum component changes the longitudinal momentum component, resulting in a phase shift that should be measurable using interferometric methods. Here we use neutron interferometry to measure the phase shift arising from lateral confinement of a neutron beam passing through a narrow slit system. The phase shift arises mainly from neutrons whose classical trajectories do not touch the walls of the slits. In this respect, the non-locality of quantum physics is apparent.
journal_name
Naturejournal_title
Natureauthors
Rauch H,Lemmel H,Baron M,Loidl Rdoi
10.1038/nature00773keywords:
subject
Has Abstractpub_date
2002-06-06 00:00:00pages
630-2issue
6889eissn
0028-0836issn
1476-4687pii
nature00773journal_volume
417pub_type
杂志文章相关文献
NATURE文献大全abstract：:The fossil record of the living great apes is poor. New fossils from undocumented areas, particularly the equatorial forested habitats of extant hominoids, are therefore crucial for understanding their origins and evolution. Two main competing hypotheses have been proposed for orang-utan origins: dental similarities s...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature02245
更新日期：2004-01-29 00:00:00
abstract：:Extinction from habitat loss is the signature conservation problem of the twenty-first century. Despite its importance, estimating extinction rates is still highly uncertain because no proven direct methods or reliable data exist for verifying extinctions. The most widely used indirect method is to estimate extinction...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature09985
更新日期：2011-05-19 00:00:00
abstract：:The spectral purity of an oscillator is central to many applications, such as detecting gravity waves, defining the second, ground-state cooling and quantum manipulation of nanomechanical objects, and quantum computation. Recent proposals suggest that laser oscillators which use very narrow optical transitions in atom...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature10920
更新日期：2012-04-04 00:00:00
abstract：:Medawar has suggested that the major histocompatibility gene complex (MHC) might be involved in the contact inhibition of movement shown by fibroblasts and epithelia. Contact inhibition of movement is that reaction of cells which stops the movement of one cell over another and thus leads to monolayering and other feat...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/281222a0
更新日期：1979-09-20 00:00:00
abstract：:The motility of the gastrointestinal tract consists of local, non-propulsive mixing (pendular or segmental) and propulsive (peristaltic) movements. It is generally considered that mixing movements are produced by intrinsic pacemakers which generate rhythmic contractions, and peristalsis by intrinsic excitatory and inh...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/19973
更新日期：1999-05-06 00:00:00
abstract：:Combined PD-1 and CTLA-4-targeted immunotherapy with nivolumab and ipilimumab is effective against melanoma, renal cell carcinoma and non-small-cell lung cancer1-3. However, this comes at the cost of frequent, serious immune-related adverse events, necessitating a reduction in the recommended dose of ipilimumab that i...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/s41586-019-1162-y
更新日期：2019-05-01 00:00:00
abstract：:Chemical reactions inside single crystals are likely to be highly selective, but examples of single crystal to single crystal (SC-SC) transformations are uncommon, because crystallinity is difficult to retain following the rearrangement of atoms in the solid state. The most widely studied SC-SC transformations involve...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature09085
更新日期：2010-06-03 00:00:00
abstract：:Animal viruses are broadly categorized structurally by the presence or absence of an envelope composed of a lipid-bilayer membrane, attributes that profoundly affect stability, transmission and immune recognition. Among those lacking an envelope, the Picornaviridae are a large and diverse family of positive-strand RNA...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature12029
更新日期：2013-04-18 00:00:00
abstract：:The structure of an N-terminal fragment of CD4 has been determined to 2.4 A resolution. It has two tightly abutting domains connected by a continuous beta strand. Both have the immunoglobulin fold, but domain 2 has a truncated beta barrel and a non-standard disulphide bond. The binding sites for monoclonal antibodies,...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/348411a0
更新日期：1990-11-29 00:00:00
abstract：:The rapid turnover of the mammalian intestinal epithelium is supported by stem cells located around the base of the crypt. In addition to the Lgr5 marker, intestinal stem cells have been associated with other markers that are expressed heterogeneously within the crypt base region. Previous quantitative clonal fate ana...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature12972
更新日期：2014-03-20 00:00:00
abstract：:The heat-shock protein Hsp90 supports diverse but specific signal transducers and lies at the interface of several developmental pathways. We report here that when Drosophila Hsp90 is mutant or pharmacologically impaired, phenotypic variation affecting nearly any adult structure is produced, with specific variants dep...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/24550
更新日期：1998-11-26 00:00:00
abstract：:When mountains form through the collision of lithospheric plates, uplift of the Earth's surface is accompanied by thickening of the crust, and the buoyancy of these deep crustal roots (relative to the surrounding mantle) is thought to contribute to the support of mountain topography. Once active tectonism ceases, cont...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature00855
更新日期：2002-06-27 00:00:00
abstract：:In this Letter, errors in Supplementary Table 1 have been corrected. ...
journal_title：Nature
pub_type： 杂志文章,已发布勘误
doi：10.1038/s41586-018-0573-5
更新日期：2018-11-01 00:00:00
abstract：:Jupiter's atmosphere is rotating differentially, with zones and belts rotating at speeds that differ by up to 100 metres per second. Whether this is also true of the gas giant's interior has been unknown, limiting our ability to probe the structure and composition of the planet. The discovery by the Juno spacecraft th...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature25775
更新日期：2018-03-07 00:00:00
abstract：:Dengue disease is caused by four different flavivirus serotypes, which infect 390 million people yearly with 25% symptomatic cases and for which no licensed vaccine is available. Recent phase III vaccine trials showed partial protection, and in particular no protection for dengue virus serotype 2 (refs 3, 4). Structur...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature14130
更新日期：2015-04-02 00:00:00
abstract：:Support-free high-speed countercurrent liquid chromatography provides a rich domain of applications, some beyond reach of conventional liquid chromatography. ...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/326419a0
更新日期：1987-03-26 00:00:00
abstract：:Understanding cellular response to environmental stress has broad implications for human disease. AMP-activated protein kinase (AMPK) orchestrates the regulation of energy-generating and -consuming pathways, and protects the heart against ischaemic injury and apoptosis. A role for circulating hormones such as adiponec...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature06504
更新日期：2008-01-31 00:00:00
abstract：:A wide variety of voltage-gated K+ channels are involved in the regulation of neuronal excitability and synaptic transmission. Their heterogeneity arises in part from the large number of genes encoding different K+ channel subunits (reviewed in ref. 1). In addition, heterologous expression studies indicate that assemb...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/365072a0
更新日期：1993-09-02 00:00:00
abstract：:Small organic molecules have proven to be invaluable tools for investigating biological systems, but there is still much to learn from their use. To discover and to use more effectively new chemical tools to understand biology, strategies are needed that allow us to systematically explore 'biological-activity space'. ...
journal_title：Nature
pub_type： 杂志文章,评审
doi：10.1038/nature03196
更新日期：2004-12-16 00:00:00
abstract：:p60src, the transforming protein of Rous sarcoma virus (RSV), is a protein kinase that has a strict specificity for tyrosine. The phosphorylation of cellular proteins by p60src (ref. 4) results in transformation. Recently, Barker and Dayhoff discovered that residues 259-485 of p60src have 22% sequence identity with re...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/310589a0
更新日期：1984-08-16 00:00:00
abstract：:Control of protein synthesis is associated with changes in the ratio of intracellular Na+ to K+ in the cultured embryonic chick lens. Correlations of intracellular Na+/K+ ratios with crystallin synthesis and cataract formation in vitro suggest that the Na+/K+ ratio may have an important role in the regulation of prote...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/270406a0
更新日期：1977-12-01 00:00:00
abstract：:A wide variety of systems, including granular media, colloidal suspensions and molecular systems, exhibit non-equilibrium transitions from a fluid-like to a solid-like state, characterized solely by the sudden arrest of their dynamics. Crowding or jamming of the constituent particles traps them kinetically, precluding...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/35081021
更新日期：2001-06-14 00:00:00
abstract：: ...
journal_title：Nature
pub_type： 新闻
doi：10.1038/d41586-018-07678-2
更新日期：2018-12-01 00:00:00
abstract：:Large panels of comprehensively characterized human cancer models, including the Cancer Cell Line Encyclopedia (CCLE), have provided a rigorous framework with which to study genetic variants, candidate targets, and small-molecule and biological therapeutics and to identify new marker-driven cancer dependencies. To imp...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/s41586-019-1186-3
更新日期：2019-05-01 00:00:00
abstract：:Epstein-Barr virus (EBV), a member of the herpes group of viruses and the aetiological agent of infectious mononucleosis, is usually thought of as a lymphotrophic virus with the ability to transform B lymphocytes. So the association of EBV with nasopharyngeal carcinoma is puzzling, especially given the lack of success...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/306480a0
更新日期：1983-12-01 00:00:00
abstract：:Superantigens bind class II major histocompatibility proteins and stimulate powerful proliferative responses of T lymphocytes bearing particular V beta sequences as part of their alpha beta antigen receptor. Exogenous bacterial superantigens are responsible for food poisoning and toxic shock syndrome. Murine virus-enc...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/358507a0
更新日期：1992-08-06 00:00:00
abstract：:In this Review, the middle initial of author Kim M. Cobb was omitted. The original Review has been corrected online. ...
journal_title：Nature
pub_type： 杂志文章,已发布勘误
doi：10.1038/s41586-019-0994-9
更新日期：2019-03-01 00:00:00
abstract：:The Delaney clause, embodied in US legislation in 1958, prohibits the addition to food of any level of any carcinogen. This position cannot be sustained in the face of progress in understanding chemically induced cancer. ...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/368582a0
更新日期：1994-04-14 00:00:00
abstract：:The search to understand the mechanisms regulating brain wiring has relied on biochemical purification approaches in vertebrates and genetic approaches in invertebrates to identify molecular cues and receptors for axon guidance. Here we describe a phenotype-based gene-trap screen in mice designed for the large-scale i...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/35065539
更新日期：2001-03-08 00:00:00
abstract：:Bottom trawling is a non-selective commercial fishing technique whereby heavy nets and gear are pulled along the sea floor. The direct impact of this technique on fish populations and benthic communities has received much attention, but trawling can also modify the physical properties of seafloor sediments, water–sedi...
journal_title：Nature
pub_type： 杂志文章
doi：10.1038/nature11410
更新日期：2012-09-13 00:00:00
