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Quantum eraser experiment
The double-slit quantum eraser experiment described in this article has three stages:[1] First, the experimenter reproduces the interference pattern of Young's double-slit experiment by shining photons at the double-slit interferometer and checking for an interference pattern at the detection screen.Next, the experimenter marks through which slit each photon went, without disturbing its wavefunction, and demonstrates that thereafter the interference pattern is destroyed. This stage indicates that it is the existence of the "which-path" information that causes the destruction of the interference pattern.Third, the "which-path" information is "erased," whereupon the interference pattern is recovered. (Rather than removing or reversing any changes introduced into the photon or its path, these experiments typically produce another change that obscures the markings earlier produced.) Quantum erasure technology can be used to increase the resolution of advanced microscope.[3] Introduction[edit]
שרדינגר עושה חיים Schrodinger
להורדה: שרדינגר.PDF (פורסם לראשונה ב"קשת החדשה" 2005. אבשלום אליצור שרדינגר עושה חיים שבוע בטירול, אוגוסט 2005 אנשים רואים דברים כפי שהם ושואלים: למה? רוברט קנדי א. עמק ארוך מבתר את רכס הרי טירול בדרומה של אוסטריה ובתחתיתו זורם האַלפּבַּאך, הוא "פלג האלפים," נחל עתיר-יובלים, קופצני וסואן, שהרבה פינות-חמד בין פיתוליו כבר נהירות לי היטב, ומעליו הכפר המצועצע הקרוי על שמו. אבל זוהי אוסטריה, וגם זיכרונות פחות לבביים ניעורים כאן מדי פעם. "מיין הֶר?" זמן קצר לאחר מלחמת העולם השנייה, כשבעלות-הברית עוד שלטו כאן והמזון היה עוד מוקצב, באו לאַלפּבַּאך שני אחים, יוצאי המחתרת האנטי-נאצית, והקימו בו בית-ספר שהוציא את שמו בעולם. לכן, לפני שנתיים, התרחב הלב כשהגיעה ההזמנה מאנטון ציילינגר, אחד הפיסיקאים הבולטים בעולם, ללמד אתו כאן קורס על תורת הקוונטים. ב. עכשיו חזרתי לכאן עם הזמנה נוספת, ללמד קורס על יישומיה הביולוגיים של תורת האינפורמציה יחד עם פטר שוסטר, כימאי מווינה, ואֵוּרש סַאטמַרי, ביולוג מבודאפשט. בין מייסדי הפיסיקה החדשה מתבדל שרדינגר כדמות לעצמה. עננה עוברת על פני רות כשאני מזכיר את הסיפור. ג. ד.
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Delayed choice quantum eraser
A delayed choice quantum eraser, first performed by Yoon-Ho Kim, R. Yu, S.P. Kulik, Y.H. Shih and Marlan O. Scully,[1] and reported in early 1999, is an elaboration on the quantum eraser experiment that incorporates concepts considered in Wheeler's delayed choice experiment. The delayed choice quantum eraser experiment investigates a paradox. Delayed choice experiments have uniformly confirmed the seeming ability of measurements made on photons in the present to alter events occurring in the past. Introduction[edit] In the basic double slit experiment, a beam of light (usually from a laser) is directed perpendicularly towards a wall pierced by two parallel slit apertures. Which-path information and the visibility of interference fringes are hence complementary quantities. A simple quantum eraser experiment[edit] Figure 1. In the two diagrams in Fig. 1, photons are emitted one at a time from a laser symbolized by a yellow star. Delayed choice[edit] The experiment of Kim et al. (2000)[edit]
Erwin Schrödinger
Erwin Rudolf Josef Alexander Schrödinger (/ˈʃroʊdɪŋər/; German: [ˈɛʁviːn ˈʃʁøːdɪŋɐ]; 12 August 1887 – 4 January 1961), a Nobel Prize-winning Austrian physicist who developed a number of fundamental results in the field of quantum theory, which formed the basis of wave mechanics: he formulated the wave equation (stationary and time-dependent Schrödinger equation) and revealed the identity of his development of the formalism and matrix mechanics. Schrödinger proposed an original interpretation of the physical meaning of the wave function and in subsequent years repeatedly criticized the conventional Copenhagen interpretation of quantum mechanics (using e.g. the paradox of Schrödinger's cat). In addition, he was the author of many works in various fields of physics: statistical mechanics and thermodynamics, physics of dielectrics, color theory, electrodynamics, general relativity, and cosmology, and he made several attempts to construct a unified field theory. In his book What Is Life?
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Wheeler's delayed choice experiment
Wheeler's delayed choice experiment is actually several thought experiments in quantum physics, proposed by John Archibald Wheeler, with the most prominent among them appearing in 1978 and 1984.[1] These experiments are attempts to decide whether light somehow "senses" the experimental apparatus in the double-slit experiment it will travel through and adjusts its behavior to fit by assuming the appropriate determinate state for it, or whether light remains in an indeterminate state, neither wave nor particle, and responds to the "questions" asked of it by responding in either a wave-consistent manner or a particle-consistent manner depending on the experimental arrangements that ask these "questions."[2] This line of experimentation proved very difficult to carry out when it was first conceived. Nevertheless, it has proven very valuable over the years since it has led researchers to provide "increasingly sophisticated demonstrations of the wave–particle duality of single quanta.
