Alice sends Bob a message of 1000 bits using for all the bits the same polarization states |θ> = cos θ|0> + sin θ|1> and |θ*> = sin θ|0> − cos θ|1> of 1000 individual photons. Eve tries to intercept the message, but doesn’t know the angle θ chosen by Alice and Bob. In the absence of a better method, Eve simply guesses the angle, which happens to be θ + π/8 . How many bits of the message will Eve be able to read correctly on average
Alice sends Bob a message of 1000 bits using for all the bits the same polarization states |θ> = cos θ|0> + sin θ|1> and |θ*> = sin θ|0> − cos θ|1> of 1000 individual photons. Eve tries to intercept the message, but doesn’t know the angle θ chosen by Alice and Bob. In the absence of a better method, Eve simply guesses the angle, which happens to be θ + π/8 . How many bits of the message will Eve be able to read correctly on average
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Alice sends Bob a message of 1000 bits using for all the bits the same polarization states |θ> = cos θ|0> + sin θ|1> and |θ*> = sin θ|0> − cos θ|1> of 1000 individual photons. Eve tries to intercept the message, but doesn’t know the angle θ chosen by Alice and Bob. In the absence of a better method, Eve simply guesses the angle, which happens to be θ + π/8 . How many bits of the message will Eve be able to read correctly on average
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