Density operators and quantum operations
... the preparation of a particular system is insufficient to determine its state. For example, someone may prepare a particle in one of the states |ψ1 i, |ψ2 i,...,|ψn i, choosing with probabilities p1 , p2 ,...,pn . Nevertheless, in either case we are able to make statistical predictions about the out ...
... the preparation of a particular system is insufficient to determine its state. For example, someone may prepare a particle in one of the states |ψ1 i, |ψ2 i,...,|ψn i, choosing with probabilities p1 , p2 ,...,pn . Nevertheless, in either case we are able to make statistical predictions about the out ...
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... system, the [distant] second system may be left in states with two different [types of] wavefunctions.” • 1935 Schrödinger’s entanglement = nonseparability. “Maximal knowledge of a total system does not necessarily include total knowledge of all its parts, not even when these are fully separated fro ...
... system, the [distant] second system may be left in states with two different [types of] wavefunctions.” • 1935 Schrödinger’s entanglement = nonseparability. “Maximal knowledge of a total system does not necessarily include total knowledge of all its parts, not even when these are fully separated fro ...
Maximizing the entanglement of two mixed qubits
... how can one increase its linear entropy given a certain degree of entanglement? It was shown by Lewenstein and Sanpera 关26兴 that any two-qubit entangled state can be written as a mixture of a separable state and a single pure entangled state. The Werner state 共4兲 is recognizably of this form. All it ...
... how can one increase its linear entropy given a certain degree of entanglement? It was shown by Lewenstein and Sanpera 关26兴 that any two-qubit entangled state can be written as a mixture of a separable state and a single pure entangled state. The Werner state 共4兲 is recognizably of this form. All it ...
Full text in PDF form
... (x) 2 L2 (R3 ) with fairly well de…ned momentum. Since its momentum is well known, by the Heisenberg uncertainty relation, its position is highly unprecise in R3 . Classical theory, however, would say that this particle moves with constant velocity along a straight line in the direction of the momen ...
... (x) 2 L2 (R3 ) with fairly well de…ned momentum. Since its momentum is well known, by the Heisenberg uncertainty relation, its position is highly unprecise in R3 . Classical theory, however, would say that this particle moves with constant velocity along a straight line in the direction of the momen ...
Serge Haroche
... measuring and manipulating individual particles while preserving their quantum-mechanical nature, in ways that were previously thought unattainable. The Nobel Laureates have opened the door to a new era of experimentation with quantum physics by demonstrating the direct observation of individual qua ...
... measuring and manipulating individual particles while preserving their quantum-mechanical nature, in ways that were previously thought unattainable. The Nobel Laureates have opened the door to a new era of experimentation with quantum physics by demonstrating the direct observation of individual qua ...
On the role of entanglement in quantum information
... C. Macchiavello / Physica A 338 (2004) 68 – 75 ...
... C. Macchiavello / Physica A 338 (2004) 68 – 75 ...
Gravitational Cat State and Stochastic Semiclassical Gravity*
... quantum and gravitation theory include: (i) mass density fluctuations persist even in single particle systems, of the same order of magnitude as the mean; (ii) a classical probe generically records a non-Markovian fluctuating force; (iii) a quantum probe interacting with the G2S system may undergo R ...
... quantum and gravitation theory include: (i) mass density fluctuations persist even in single particle systems, of the same order of magnitude as the mean; (ii) a classical probe generically records a non-Markovian fluctuating force; (iii) a quantum probe interacting with the G2S system may undergo R ...
Quantum Superposition, Quantum Entanglement, and Quantum
... - Superposition principle and entanglement and the two hallmark effects of quantum mechanics. - The next-generation quantum technologies could be based on these two effects. ...
... - Superposition principle and entanglement and the two hallmark effects of quantum mechanics. - The next-generation quantum technologies could be based on these two effects. ...
ppt - IIT Kanpur
... - Superposition principle and entanglement and the two hallmark effects of quantum mechanics. - The next-generation quantum technologies could be based on these two effects. ...
... - Superposition principle and entanglement and the two hallmark effects of quantum mechanics. - The next-generation quantum technologies could be based on these two effects. ...
PPTx
... A. K. Ekert, Quantum Cryptography based on Bell’s theorem, Phys. Rev. Lett. 67, 661 (1991) N. D. Mermin, Quantum mysteries revisted, Am. J. Phys. 58, 731 (1990) N. D. Mermin, Extreme quantum entanglement in a superposition of macroscopically distinct ...
... A. K. Ekert, Quantum Cryptography based on Bell’s theorem, Phys. Rev. Lett. 67, 661 (1991) N. D. Mermin, Quantum mysteries revisted, Am. J. Phys. 58, 731 (1990) N. D. Mermin, Extreme quantum entanglement in a superposition of macroscopically distinct ...
1 What Is the Measurement Problem Anyway?
... The uncertainty principle is the general formulation of this duality, allowing only one out of a pair of physical values to be measured with arbitrary accuracy. • Quantum–Classical Limit. The extraordinary predictions of quantum mechanics, such as the above interference effects, hold perfectly for pa ...
... The uncertainty principle is the general formulation of this duality, allowing only one out of a pair of physical values to be measured with arbitrary accuracy. • Quantum–Classical Limit. The extraordinary predictions of quantum mechanics, such as the above interference effects, hold perfectly for pa ...
Quantum Teleportation
... whose quantum states are highly correlated with one another Alice keeps one of these particles and sends the other to Bob (via the bottom line of the teleportation "circuit") Although the two particles become physically remote from one another, the correlation between their states persists so long a ...
... whose quantum states are highly correlated with one another Alice keeps one of these particles and sends the other to Bob (via the bottom line of the teleportation "circuit") Although the two particles become physically remote from one another, the correlation between their states persists so long a ...
Nonlinearity in Classical and Quantum Physics
... A natural question is therefore, where are the signatures of this transition on the quantum mechanical description? The very nature of this question demands to introduce techniques that allow us to connect the classical and quantum descriptions of physical phenomena. These techniques start with the ...
... A natural question is therefore, where are the signatures of this transition on the quantum mechanical description? The very nature of this question demands to introduce techniques that allow us to connect the classical and quantum descriptions of physical phenomena. These techniques start with the ...
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... say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely ...
... say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind; it may be the beginning of knowledge, but you have scarcely ...
