Two-photon path-entangled states in multi-mode waveguides

We experimentally show that two-photon path-entangled states can be coherently manipulated by multi-mode interference in multi-mode waveguides. By measuring the output two-photon spatial correlation function versus the phase of the input state, we show that multi-mode waveguides perform as nearly-ideal multi-port beam splitters at the quantum level, creating a large variety of entangled and separable multi-path two-photon states.Comment: 4 pages, 4 figure

Volume 19, Number 1 - October 1936

Volume 19, Number 1 - October 1936. 66 pages including covers and advertisements. Sheen, Rt. Rev. Msgr., Fulton, J., The Dignity of Man Hughes, Edward Riley, Perception--A Poem O\u27Brien, George V., The Kettle--A Short Story Geary, William Denis, Good Intentions--A Poem Healy, Robert C., Corvo, Singer In Solitude Gibbons, Walter F., On The Psychology Of Hosiery Hughes, Edward Riley, First Citizen--A Poem King, Francis J., Present Day Art Geary, William Denis, Moderation--A Poem Graham, John A., One Fleeting Hour--A Short Story Geary, William Denis, Flight--A Poem Plasse, William B., Races Are Fixed! McTige, Joseph, Fair Ireland Hughes, Edward Riley, Prayer--A Poem Hughes, Walter Appleton, The Bore The Merrier Hughes, Edward Riley, Via Crucis--A Poem Flynn, Thomas, Catholics, Child Labor and the Amendment Scowcroft, George T., The Collegiate World Editorials Book Review

Treatment of esophageal achalasia in children: Today and tomorrow

Esophageal achalasia (EA) is a rare esophageal motility disorder in children. Laparoscopic Heller myotomy (LHM) represents the treatment of choice in young patients. Peroral endoscopic myotomy (POEM) is becoming an alternative to LHM. The aim of this study is to evaluate the effectiveness, safety, and outcomes of POEM vs LHM in treatment of children with EA. Data of pediatric patients with EA, who underwent LHM and POEM from February 2009 to December 2013 in two centers, were collected. Eighteen patients (9 male, mean age: 11.6 years; range: 2-17 years) were included. Nine patients (6 male, mean age: 10.7 years; range: 2-16 years) underwent LHM, and the other 9 (3 males, mean age: 12.2 years; range: 6-17 years) underwent POEM procedure. Mean operation time was shorter in POEM group compared with LHM group (62/149 minutes). Myotomy was longer in POEM group than in LHM group (11/7 cm). One major complication occurred after LHM (esophageal perforation). No clinical and manometric differences were observed between LHM and POEM in follow-up. The incidence of iatrogenic gastroesophageal reflux disease was low (1 patient in both groups). Results of a midterm follow-up show that LHM and POEM are safe and effective treatments also in children. Besides, POEM is a mini-invasive technique with an inferior execution timing compared to LHM. A skilled endoscopic team is mandatory to perform this procedur

To Archive or Not to Archive: The Resistant Potential of Digital Poetry

This essay addresses the much discussed problem of archiving digital poetry. Digital media are labile, and several writers of digital poetry are incorporating the media’s ephemerality into their poetics. Rather than rehash arguments that have been taking place within the field of digital media and digital poetics for years, I turn to the field of contemporary art curation and preservation, a field in which curators and archivists are struggling with the very immediate concerns, ethical and otherwise, related to archiving works that are made from ephemeral media. One particular digital poem that has recently broken, has recently become unreadable, is Talan Memmott’s Lexia to Perplexia. Memmott composed the poem in 2000, and he incorporated the poem’s inevitable obsolescence into the text of the poem itself. He has since refused to “fix” or “update” the poem, because he contends that that would make it something other than what it was intended to be. Rather, he is choosing to let the poem die because that is what the poem is supposed to do. This essay concludes with a discussion of the political implications of acknowledging the ephemerality of digital media, the resistant potential of the poem when its ephemerality is embraced, and some ways in which archivists can preserve the memory of the poem without necessarily preserving the poem itself