Schwinger, First Edition (20 results)

Hard Cover. Condition: Very Good. Mit 100 Pictures (illustrator). First Edition. a very good hardcover; an ex-library copy with usual markings; internally pages bright and clean; ---------- SATISFACTION GUARANTEED --------- FAST, COURTEOUS SERVICE ------ ALL ORDERS SHIPPED WITH DELIVERY CONFIRMATION; Size: 6 x 8". Ex-Library.

Hardcover. Condition: Near Fine. Dust Jacket Condition: Fine. 25.5 x 17 cm. Octavo. 195pp. Black boards in dust jacket. Name written on first page. Collects 15 articles on Schwinger including personal recollections and on his theoretical physics works. Appendices for Schwinger's doctoral students and his publications.

Taschenbuch. Condition: Gut. 1., Aufl. 80 S. 77 Seiten mit Abbildungen, Text deutsch, englisch und franzoesisch. Buch ist in gutem Zustand, nur sehr geringe Gebrauchs- Alters- oder Lagerungsspuren. ISBN: 3937577807 Wir senden umgehend mit beiliegender MwSt.Rechnung. Sprache: Deutsch Gewicht in Gramm: 210.

Condition: Sehr gut. 1. Auflage. Durchgehend farbige Fotos, 112 S. (Kunstdruckpapier). "Schwingen, das ist ein Stück Schweiz aus dem Bilderbuch. Starke Mannen machen aus, wer der stärkste sei unter ihnen, der `böseste`. Jeden Sonntag besuchen Zehntausende von Zuschauern die kleinen und grossen Schwingfeste des Landes. Sie gehen nicht nur wegen des Sports. Ein Schwingfest ist auch etwas fürs Gemüt." (Aus dem Verlagstext). Sehr gutes Exemplar. Sprache: Deutsch Gewicht in Gramm: 1950 25 x 29 cm (Querformat), Leinen mit fotoillustriertem Schutzumschlag. Farbige Vorsätze.

Soft cover. Condition: As New. 1st Edition. From publisher's library. Library marking on the spine. Bookplate on inside cover and library stamp, otherwise book is new, never read, pages clean and crisp, spine unbroken. Oversized book, may incur additional shipping fees. 1025B.

Farbig illustrierter Original-Pappband, mit vielen Abbildungen nach Fotografien, 1 CD, 280 Seiten, 16,5 x 23 cm, Erste Ausgabe, schönes Exemplar.

1st edition, hardback, large 8vo, xii,677pp, illustrated, clean and tight, no inscriptions, Very Good / Very Good dustwrapper. ISBN: 0198506589.

Condition: New. An introduction to the Schwinger action principle for graduate students and researchers in theoretical physics. Series: Cambridge Monographs on Mathematical Physics. Num Pages: 508 pages, 25 b/w illus. BIC Classification: PH. Category: (P) Professional & Vocational. Dimension: 247 x 174 x 29. Weight in Grams: 1010. . 2007. 1st Edition. hardcover. . . . .

Soft cover. Condition: As New. 1st Edition. Sm.8° - Color Photo-reproductions. Exhibition catalog. Text in German, French and Italian language. Original boards. As new!

1. Xylographie (Holzstich) nach Grob (im Druckstock signiert) auf rückseitig unbedrucktem Blatt, bildliche Darstellung ca. 19 x 25 cm, Blattgröße ca. 24,5 x 31,5 cm, sauber und sehr gut erhalten 1100 gr.

Hardcover. Condition: Very Good+. First Edition. Peach cloth with gilt lettering. Light soil to covers. No jacket. First edition. Tight and square. ; 8vo 8" - 9" tall.

Soft cover. Condition: Very Good. 1st Edition. First edition, journal issues in original printed wrappers, of Dyson's proof of the equivalence between Richard Feynman's diagram-based approach to quantum electrodynamics (QED) and Julius Schwinger and Sin-Itiro Tomonaga's operator method approach. Dyson, "one of England's two or three most brilliant mathematical prodigies" (Gleick, Genius, p. 235), was then a graduate student at Cornell, where Feynman was teaching. "A detailed comparison between the different approaches to QED proposed by Feynman, by Tomonaga, and by Schwinger was given by Freeman Dyson, He stressed that 'the advantages of the Feynman theory are simplicity and ease of application, while those of Tomonaga-Schwinger are generality and theoretical completeness.' At that time, when much of Feynman's theory was still unpublished, Dyson (who knew about Feynman's work from personal discussions with him) undertook to investigate the relations between these three approaches, which at first seemed to be completely different from each other, and to establish their equivalence" (Mehra, Beat of a Different Drum, p. 314). "Dyson realized that Feynman and Schwinger were both dealing with different versions of Heisenberg's S-matrix [which encodes the probabilities associated with the different routes from the different possible initial states to the different possible final states]. He then formally introduced 'time-ordering' and provided a unified approach by demonstrating the equivalence of the Feynman and Schwinger-Tomonaga theories. This approach also allowed him to show how the Schwinger theory could be greatly simplified and extended to all orders of the perturbation expansion. Dyson's time-ordering idea was actually obtained from discussions with Feynman, who later explored and fully developed it into his time-ordered operator calculus" (Gill, The Feynman-Dyson view, J. Phys.: Conf. Ser. 845, 2017). "A unified development of the subject of quantum electrodynamics is outlined, embodying the main features both of the Tomonaga-Schwinger and of the Feynman radiation theory. The theory is carried to a point further than that reached by these authors, in the discussion of higher order radiative reactions and vacuum polarization phenomena. However, the theory of these higher order processes is a program rather than a definitive theory, since no general proof of the convergence of these effects is attempted. The chief results obtained are (a) a demonstration of the equivalence of the Feynman and Schwinger theories, and (b) a considerable simplification of the procedure involved in applying the Schwinger theory to particular problems, the simplification being the greater the more complicated the problem" (Abstract). At an American Physical Society meeting just after the end of the War, "Dyson found himself almost as much a hero as Schwinger had been the year before. Sitting in the audience with Feynman beside him, he listened as a speaker talked admiringly of 'the beautiful theory of Feynman-Dyson'. Feynman said loudly, 'Well, Doc, you're in'" (Gleick, p. 270). Two complete journal issues, large 8vo, pp. 351-535; 1637-1780. Original printed wrappers (spine of February issue darkened and with minor loss at ends).

Gr.8°, 280 S., tlw. farb. Abb., 1 CD («Rund umä Riodi»), Kart., Tadellos. Erstausgabe. 1100 gr. Schlagworte: Musik - Rock, Pop, Helvetica - Allgemein.

1. prächtige Original-Lithographie nach Hess von kämpfenden Männern in Lederhosen (Schwingern), von alter Hand sehr schön naturgetreu koloriert, bis in den Rand der bildlichen Darstellung ausgeschnitten und auf Papier der Zeit aufgeklebt, bildliche Darstellung 18,5 x 17 cm, Blattgröße ca. 28 x 24 cm, sehr gut erhalten und sehr selten 2100 gr.

1. prächtige Original-Lithographie nach Hess (im Stein signiert) von kämpfenden Burschen in Lederhosen (Schwingern) auf rückseitig unbedrucktem Karton, von alter Hand in deckenden Farben meisterhaft gouachiert, wirkt wie ein Ölgemälde, bildliche Darstellung ca. 11,5 x 15,5 cm, Kartongröße ca. 19,5 x 22,5 cm, im breiten Rand außerhalb der bildlichen Darstellung etwas berieben, ansonsten bemerkenswert gut erhalten, selten 2100 gr.

1st Edition. FIRST EDITION IN ORIGINAL WRAPS OF 3 SIGNIFICANT PAPERS: GELL-MANN & LOW'S THEOREM, STERNHEIMER ON SHIELDING & ANTI-SHIELDING, & SCHWINGER ON PHENOMENOLOGICAL NEUTRON-PROTON INTERACTION. GELL-MANN & LOW: Tackling formalism and the bound-state problem, Gell-Mann and Low's paper is Nobel Prize winner Gell-Mann's first published paper. The theorem and formal derivation they achieve is a "cornerstone in quantum field theory and zero-temperature many-body theory" (Molinari, Journal of Mathematics, 48, 2007). In quantum field theory, the Gell-Mann and Low theorem "allows one to relate the ground (or vacuum) state of an interacting system to the ground state of the corresponding non-interacting theory. The theorem is useful because, among other things, by relating the ground state of the interacting theory to its non-interacting ground state, it allows one to express Green's functions (which are defined as expectation values of Heisenberg-picture fields in the interacting vacuum) as expectation values of interaction picture fields in the non-interacting vacuum. While typically applied to the ground state, the Gell-Mann and Low theorem applies to any eigenstate of the Hamiltonian. Its proof relies on the concept of starting with a non-interacting Hamiltonian and adiabatically switching on the interactions"; the proof is based on Dyson's time-ordered expansion of the propagator; a proof based on exact identities for the time propagator is here given" (Wikipedia; Molinari). STERNHEIMER: Physicists knew that electrons of any given ion interacted with the quadrupolar field of the nucleus as well as with the local electrostatic potential. With respect to NMR issues, though, an important question remained: "What part of the energy of the system ion plus nuclear quadrupole moment plus local field depends on the orientation of the nucleus?" (Solid State Physics, 5, 347). Sternheimer was the first to study questions of this nature. Sternheimer found that "a perturbing potential, whether originating within an ion or outside it, polarizes the spherically symmetric complete shells of electrons. The complete shells, having thus lost their spherical symmetry, contribute destructively (shielding) or constructively (antishielding) to the perturbing potential at any site. The reduction or enhancement of the perturbing potential, the so called Sternheimer effect, could be accounted for in terms of some parameters" (Dekeyser, Electron Emission Spectroscopy, 250). To this day, the two Sternheimer shielding factors are still taken into account when core electrons are near an electric field gradient, Sternheimer shielding and anti-shielding factors. One is "associated with charges which are on the atom (or ion) in question, and one associated with more distant charges" (Vij, Handbook, 92). SCHWINGER & FESHBACH: "This paper describes the calculations and results obtained in fitting a phenomenological interaction to the properties of the deuteron and related low energy phenomena" (Schwinger and Feshbach, Phys. Rev. 84, 194). Together, Schwinger and Feshbach "solved the problem of the deuteron ground state and numerically calculated the quadrupole moment, effective range and relative probabilities for the system remaining in a D-angular momentum state, as well as the cross sections for photoelectric disintegration of deuterons" (Mehra, Climbing the Mountain, 163). While their calculations are now mainly of "historical interest only", Schwinger and Feshbach made their calculations on Harvard's first â??computing machine' - an IBM Automatic Sequence Controlled Calculator/Mark I; as well, they were among the first to use it (ibid). That machine is now on display in Harvard's Science Center. CONDITION & DETAILS: Lancaster: American Physical Society. Original wraps, complete. Two nearly invisible stamp on front wrap; professionally rebacked at the spine. 4to (10.5 x 8 inches; 263 x 200mm). Near fine condition inside and out.

First edition, first impression, of the first paper that demonstrated the equivalence between Richard Feynman's diagram-based approach to quantum electrodynamics and Julius Schwinger and Sin-Itiro Tomonaga's operator method approach. Both theories were presented for the first time at the Pocono Conference in April 1948, with Feynman and Schwinger going head-to-head, each wary of the other and jealously guarding their intellectual territory. Freeman Dyson, "one of England's two or three most brilliant mathematical prodigies" (Gleick, Genius, p. 235), was then a graduate student at Cornell, where Feynman was teaching, and though he did not attend the conference he eagerly absorbed the notes made by attendees. At the end of the summer he submitted a "manuscript representing a cathartic outpouring of work. Dyson had found the mathematical common ground [between the two theories] he was sure must exist. His chief insight was to focus on a so-called scattering matrix, or S matrix, a mustering of all the probabilities associated with the different routes from an initial state to a given end point. He now advertised a 'unified development of the subject' - more reliable than Feynman and more useable than Schwinger" (Gleick p. 267). But Dyson was concerned about publishing his own paper on two unpublished theories by more senior physicists - would he offend Feynman or Schwinger? Discussing the predicament with Hans Bethe, Dyson argued that "it was Schwinger's and Feynman's own fault that they had not published 'any moderately intelligible account': Schwinger, he suspected, was polishing obsessively, and Feynman simply couldn't be bothered with paperwork. It was irresponsible. They were retarding the development of science. By publicizing their work Dyson was performing a service to humanity, he argued. By January the war had been won. At the American Physical Society meeting Dyson found himself almost as much a hero as Schwinger had been the year before. Sitting in the audience with Feynman beside him, he listened as a speaker talked admiringly of 'the beautiful theory of Feynman-Dyson'. Feynman said loudly, 'Well, Doc, you're in'" (Gleick, pp. 267-70). Octavo. Original green wrappers printed in black. Tiny ownership signature to front wrapper. Closed tear at the base of the toned spine. An excellent copy.

Hardcover. Condition: new. Hardcover. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models including BoseEinstein condensation, the Casimir effect and trapped Fermi gases. The book begins with a brief review of the action principle in classical mechanics and classical field theory. It then moves on to quantum field theory, focusing on the effective action method. This is introduced as simply as possible by using the zero-point energy of the simple harmonic oscillator as the starting point. The book concludes with a more complete definition of the effective action, and demonstrates how the provisional definition used earlier is the first term in the systematic loop expansion. The renormalization of interacting scalar field theory is presented to two-loop order. This book will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models, not only those of interest to particle physics. It will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This item is printed on demand. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.

Hardcover. Condition: new. Hardcover. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models including BoseEinstein condensation, the Casimir effect and trapped Fermi gases. The book begins with a brief review of the action principle in classical mechanics and classical field theory. It then moves on to quantum field theory, focusing on the effective action method. This is introduced as simply as possible by using the zero-point energy of the simple harmonic oscillator as the starting point. The book concludes with a more complete definition of the effective action, and demonstrates how the provisional definition used earlier is the first term in the systematic loop expansion. The renormalization of interacting scalar field theory is presented to two-loop order. This book will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models, not only those of interest to particle physics. It will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This item is printed on demand. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.

Hardcover. Condition: new. Hardcover. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models including BoseEinstein condensation, the Casimir effect and trapped Fermi gases. The book begins with a brief review of the action principle in classical mechanics and classical field theory. It then moves on to quantum field theory, focusing on the effective action method. This is introduced as simply as possible by using the zero-point energy of the simple harmonic oscillator as the starting point. The book concludes with a more complete definition of the effective action, and demonstrates how the provisional definition used earlier is the first term in the systematic loop expansion. The renormalization of interacting scalar field theory is presented to two-loop order. This book will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This book is an introduction to the Schwinger action principle in quantum mechanics and quantum field theory, with applications to a variety of different models, not only those of interest to particle physics. It will interest graduate students and researchers in theoretical physics who are familiar with quantum mechanics. This item is printed on demand. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.