Two-particle interference in standard and Bohmian quantum mechanics

The compatibility of standard and Bohmian quantum mechanics has recently been challenged in the context of two-particle interference, both from a theoretical and an experimental point of view. We analyze different setups proposed and derive corresponding exact forms for Bohmian equations of motion. The equations are then solved numerically, and shown to reproduce standard quantum-mechanical results.Comment: Minor corrections, 2 references added, version to appear in J. Phys.

Response of rice varieties to short-day treatment

Synchronisation of flowering was effected in fifty rice varieties, ranging from early to very late duration, by giving 8 light hours photoperiod to 30 days old seedlings for 20 days. The results showed that the later the type, the greater was its response to photoperiod and regression value of photoperiod response over the normal duration of the varieties was approximately 1.0

The Association Between Discrimination and Sleep is Exacerbated in Individuals with Comorbid Chronic Health Conditions

Introduction: The consequences of recurrent, stressful daily experiences for sleep health appear intensified in individuals with pre-existing health conditions. Although discrimination has been associated with sleep outcomes, the role of comorbid chronic health conditions (CCHCs), and impact of perceived discrimination, remains unclear. The present study investigated (1) the associations between daily discrimination and sleep and (2) moderating roles of CCHCs and daily life interference and hardship. Methods: The current study utilized archival data from the Midlife in the United States (MIDUS) Study II. Participants, 174 adults (51% female, Mage=57 yrs., SD=11.5 yrs.), completed 7 days of actigraphy, sleep diary, PSQI, and CCHC-reporting measures. Models examined the moderating effects of CCHCs, daily interference, and hardship on the association between discrimination and sleep. Results: Daily discriminatory experiences predicted numerous poor sleep outcomes, exacerbated for persons with higher CCHCs. Higher comorbidity (95% CI=5.40, 68.75) exacerbated the association between discrimination and TSTactigraphy, further strengthened by perceived hardship (95% CI=-3.75, -.40) and interference (95% CI=-3.65, -.30). Number of CCHCs, qualified by perceived hardship (95% CI=.00, .04) and interference (95% CI=.01, .05), predicted diary sleep quality above discrimination. The interaction between CCHCs and hardship predicted global PSQI scores (95% CI=-.91, -.12) beyond discrimination. Conclusion: Daily experiences of discrimination are associated with decreased sleep duration and quality. These associations were stronger for individuals with multiple CCHCs. Exacerbating CCHC effects were perpetuated by perceived interference and hardships, suggesting individual emotion regulation (ER) differences. Future research should attend to sleep-related consequences of differential discrimination-informed ER by persons with CCHCs.https://scholarscompass.vcu.edu/gradposters/1042/thumbnail.jp

Inheritance of anthocyanin pigmentation in leaf blade of rice (Oryza sativa L.)

Three leaf blade pigment patterns viz., purple (Strain CP.12), purple wash (Strain CH.17) and faint purple wash (Strain CH.17 mutant) have been described. The mode of inheritance of anthocyanin pigmentation in the leaf blade has been studied by making inter-crosses between the three pigmented types and between these pigmented and several green leaf blade types. A six factor hypothesis showing the role of each gene and its relationship with others is presented to explain this inheritance. The F 2 segregation of 13:3, 55:9 and 229:27 of green: purple leaf, obtained in crosses between CP.12 × HS.22, CP.12 × T.1029/2 or CP.12 × T.786 and CP.12 × T.136 respectively is due to two, three and four gene differences respectively between the parents crossed; one of these genes is an inhibitory factor which suppresses the expression of purple pigment. The 9:7 and 27:37 ratios of purple wash: green in crosses between CH.17 and green leaf blade varieties are due to the interaction of two and three complementary genes respectively. The F 2 segregation of 39 purple wash:12 purple:13 green obtained from the cross CP.12 × CH.17 (purple × purple wash) is shown to be due to interaction of complementary factors and presence of an inhibitory gene Ilp, the latter being epistatic over gene Lp for purple colour. The four factor segregation of 117PW: 36P: 48FPW: 55G in the cross CP.12 × CH.17mutant, is shown to be due to interaction of four complementary genes one of which is a lower allele Ld' and the other an inhibitory factor Ilp. The monogenic segregation obtained from the cross CH.17 × CH.17 mutant is shown to be due to a single factor difference Ld-Ld'. The occurrence of purple wash leaf blade phenotype along with the faint purple wash and green leaf blade phenotypes in the F 2 of the cross AC.16 × CH.17 mutant (G × FPW) has been explained as being due to the presence of the higher allele Ld in AC.16 as against the lower allele Ld' present in CH.17 mutant. Some of the anomalous ratios like 3 green: 1 purple, 10 green: 1 purple and 8.3 green: 1 purple reported by previous workers have been explained on the basis of the six factor hypothesis

Experimental tests of hidden variable theories from dBB to Stochastic Electrodynamics

In this paper we present some of our experimental results on testing hidden variable theories, which range from Bell inequalities measurements to a conclusive test of stochastic electrodynamics

The genetics of Corchorus (jute) V. The inheritance and linkage relations of bitter taste, anther and corolla colour

1. Monogenic inheritance has been established for the following characters of the jute plant: (a) Bitter-non-bitter taste (Tb-tb) in C. capsularis. (b) Yellow-light yellow anther colour (Ay-ay) in C. capsularis. (c) Yellow-light yellow corolla-anther colour (Pyo -pyo) in C. olitorius. 2. The following linkage relationships have been established: (a) Bitter taste and branching habit factor pairs are linked with 22.2% crossing-over value. (b) The corolla and anther colour factor pairs in C. capsularis are completely linked, while in C. olitorius corolla colour and anther colour expression is probably controlled by the same factor pair. (c) The genes of C. capsularis described here have been shown to be located in five groups. (d) The corolla-anther factor pair in C. olitorius has been shown to be independent of the anthocyanin multiple allelomorphs

'Parasitic invasions' or sources of good governance: constraining foreign competition in Hong Kong banking, 1956-81

This paper investigates the operation and impact of the moratorium on new banking licences imposed in Hong Kong in 1965 and the claims that foreign banks destabilised the banking system and drained resources from the colony. First it examines foreign banks' attempts to circumvent the moratorium through claims of special circumstances and buying interests in local banks, and secondly it examines the efforts of incumbents to extend barriers to non-bank financial institutions and to branches of foreign banks. The general conclusions are that while the moratorium was aimed at increasing the stability of the banking system, it had the effect of decreasing the regulatory breadth of the government, and reducing incentives for mergers and acquisitions that might have improved governance

Review of recent experimental progresses in Foundations of Quantum Mechanics and Quantum Information obtained in Parametric Down Conversion Experiments at IENGF

We review some recent experimental progresses concerning Foundations of Quantum Mechanics and Quantum Information obtained in Quantum Optics Laboratory "Carlo Novero" at IENGF. More in details, after a short presentation of our polarization entangled photons source (based on precise superposition of two Type I PDC emission) and of the results obtained with it, we describe an innovative double slit experiment where two degenerate photons produced by PDC are sent each to a specific slit. Beyond representing an interesting example of relation between visibility of interference and "welcher weg" knowledge, this configuration has been suggested for testing de Broglie-Bohm theory against Standard Quantum Mechanics. Our results perfectly fit SQM results, but disagree with dBB predictions. Then, we discuss a recent experiment addressed to clarify the issue of which wave-particle observables are really to be considered when discussing wave particle duality. This experiments realises the Agarwal et al. theoretical proposal, overcoming limitations of a former experiment. Finally, we hint to the realization of a high-intensity high-spectral-selected PDC source to be used for quantum information studies

Quantum Stephani exact cosmological solutions and the selection of time variable

We study perfect fluid Stephani quantum cosmological model. In the present work the Schutz's variational formalism which recovers the notion of time is applied. This gives rise to Wheeler-DeWitt equation for the scale factor. We use the eigenfunctions in order to construct wave packets for each case. We study the time-dependent behavior of the expectation value of the scale factor, using many-worlds and deBroglie-Bohm interpretations of quantum mechanics.Comment: 19 pages, 7 figure

The GRA Beam-Splitter Experiments and Particle-Wave Duality of Light

Grangier, Roger and Aspect (GRA) performed a beam-splitter experiment to demonstrate the particle behaviour of light and a Mach-Zehnder interferometer experiment to demonstrate the wave behaviour of light. The distinguishing feature of these experiments is the use of a gating system to produce near ideal single photon states. With the demonstration of both wave and particle behaviour (in two mutually exclusive experiments) they claim to have demonstrated the dual particle-wave behaviour of light and hence to have confirmed Bohr's principle of complementarity. The demonstration of the wave behaviour of light is not in dispute. But we want to demonstrate, contrary to the claims of GRA, that their beam-splitter experiment does not conclusively confirm the particle behaviour of light, and hence does not confirm particle-wave duality, nor, more generally, does it confirm complementarity. Our demonstration consists of providing a detailed model based on the Causal Interpretation of Quantum Fields (CIEM), which does not involve the particle concept, of GRA's which-path experiment. We will also give a brief outline of a CIEM model for the second, interference, GRA experiment.Comment: 24 pages, 4 figure