{ "item_title" : "Two Places at Once", "item_author" : [" Rajesh Kumar Krishnan "], "item_description" : "Why does light come in packets? How can a single electron pass through two slits at once? Why can a particle tunnel through a wall it has no energy to climb, and how can two photons stay linked across a city?Two Places at Once answers these questions, 300 of them in fact, one formula at a time. Rajesh Kumar Krishnan, a quantum-technology engineer, takes readers from Planck's desperate guess of 1900 to the mathematics that runs quantum computers and quantum-secure communication.Every formula gets the same treatment: a story that makes it familiara derivation in which every step can be checkeda picture that makes it visiblea worked example with real numbersa plain explanation of what the result truly meansAlong the way, readers discover why the sky is blue and gold is yellow, and why the Sun shines slowly. They learn how an MRI scanner reads the body, and how a microscope feels single atoms. They see why no one can copy a quantum secret, and why every mass is, quite literally, a clock.Rigorous yet playful, this is a book for students, engineers and the endlessly curious. It is for anyone who has heard that quantum physics is impossible to understand and suspects that, given patience and a pencil, it might not be. By the last page, the strange will feel strangely familiar.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/9/79/890/763/9798907637191_b.jpg", "price_data" : { "retail_price" : "140.00", "online_price" : "140.00", "our_price" : "140.00", "club_price" : "140.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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