Generalized intelligent states of the su(N) algebra

Schr\" odinger-Robertson uncertainty relation is minimized for the quadrature components of Weyl generators of the algebra $su(N)$. This is done by determining explicit Fock-Bargamann representation of the $su(N)$ coherent states and the differential realizations of the elements of $su(N)$. New classes of coherent and squeezed states are explicitly derived

Connection between the elastic GEp/GMp and P to Delta form factors

It is suggested that the falloff in Qsq of the P to Delta magnetic form factor GM* is related to the recently observed falloff of the elastic electric form factor GEp/GMp. Calculation is carried out in the framework of a GPD mechanism

Ehlers Danlos Syndrome: An Unusual Presentation You Need to Know about

The Ehlers Danlos syndromes (EDS) comprise a group of connective tissue disorders characterized by tissue fragility of the skin, ligaments, blood vessels and internal organs. Variable degrees of clinical severity and organ involvement are due to the molecular and biochemical heterogeneity of this group of disorders and have led to classification into well-characterized subtypes that are extending with the discovery of new genes and overlapping syndrome. Types include classical EDS (EDS I/II), hypermobility EDS (EDS III), vascular EDS (EDS IV), kyphoscoliosis EDS (EDS VI), arthrochalasia (EDS VIIA, B) and Dermatospraxis (EDS VIIC). Even to the well trained professional, the diagnosis of EDS remains a challenge due to overlapping symptoms and cases can remain without a well-defined classification. Life altering complications of this group of disorders include vascular and hollow organ rupture and ligamentous laxity leading to chronic dislocation with ensuing pain and long term disability. Patients initially present to the general practitioner who is expected to recognize the symptoms of EDS and to proceed with appropriate referral for definitive diagnosis and management to prevent devastating complications. In this paper, we describe a male with classical EDS complicated by devastating vascular and orthopedic events

This is not a pipeline

Review of: Andrew Barry (2013) Material politics: disputes along the pipeline. Wiley-Blackwell: Londo

Mean parity of single quantum excitation of some optical fields in thermal environments

The mean parity (the Wigner function at the origin) of excited binomial states, excited coherent states and excited thermal states in thermal channel is investigated in details. It is found that the single-photon excited binomial state and the single-photon excited coherent state exhibit certain similarity in the aspect of their mean parity in the thermal channel. We show the negative mean parity can be regarded as an indicator of nonclassicality of single-photon excitation of optical fields with a little coherence, especially for the single-photon excited thermal states.Comment: 4 pages, 4 figures, RevTex4; PACS numbers: 42.50.Dv, 03.65.Yz, 05.40.Ca; Three typo errors have been correcte

Entanglement criteria via the uncertainty relations in su(2) and su(1,1) algebra: detection of non-Gaussian entangled states

We derive a class of inequalities, from the uncertainty relations of the SU(1,1) and the SU(2) algebra in conjunction with partial transposition, that must be satisfied by any separable two-mode states. These inequalities are presented in terms of the su(2) operators J_x, J_y, and the total photon number N_a+N_b. They include as special cases the inequality derived by Hillery and Zubairy [Phys. Rev. Lett. 96, 050503 (2006)], and the one by Agarwal and Biswas [New J. Phys. 7, 211 (2005)]. In particular, optimization over the whole inequalities leads to the criterion obtained by Agarwal and Biswas. We show that this optimal criterion can detect entanglement for a broad class of non-Gaussian entangled states, i.e., the su(2) minimum-uncertainty states. Experimental schemes to test the optimal criterion are also discussed, especially the one using linear optical devices and photodetectors.Comment: published version, presentation polished with references added, 7 pages, 4 figure

Linear amplification and quantum cloning for non-Gaussian continuous variables

We investigate phase-insensitive linear amplification at the quantum limit for single- and two-mode states and show that there exists a broad class of non-Gaussian states whose nonclassicality survives even at an arbitrarily large gain. We identify the corresponding observable nonclassical effects and find that they include, remarkably, two-mode entanglement. The implications of our results for quantum cloning outside the Gaussian regime are also addressed.Comment: published version with reference updat

Isotropic phase squeezing and the arrow of time

We prove that isotropic squeezing of the phase is equivalent to reversing the arrow of time.Comment: 8 pages. 2 eps figures. elsart styl

Single-shot measurement of quantum optical phase

Although the canonical phase of light, which is defined as the complement of photon number, has been described theoretically by a variety of distinct approaches, there have been no methods proposed for its measurement. Indeed doubts have been expressed about whether or not it is measurable. Here we show how it is possible, at least in principle, to perform a single-shot measurement of canonical phase using beam splitters, mirrors, phase shifters and photodetectors.Comment: This paper was published in PRL in 2002 but, at the time, was not placed on the archive. It is included now to make accessing this paper easie