Quantum Measurement and Control
... guarantees that there is at least one state of complete knowledge (that is, one configuration) that all observers agree is a possible state. We now consider measurement of a classical system. With a perfect measurement of X, the observer would simply find out its value, say x . The system state wo ...
... guarantees that there is at least one state of complete knowledge (that is, one configuration) that all observers agree is a possible state. We now consider measurement of a classical system. With a perfect measurement of X, the observer would simply find out its value, say x . The system state wo ...
Quantum Physics
... the coin lands, etc. permit us in principle to predict the result. Some physicists4 have suggested that the probabilistic nature of quantum mechanics has an analogous origin: if we had access to additional variables which at present we do not know, the so-called hidden variables, we would be able to ...
... the coin lands, etc. permit us in principle to predict the result. Some physicists4 have suggested that the probabilistic nature of quantum mechanics has an analogous origin: if we had access to additional variables which at present we do not know, the so-called hidden variables, we would be able to ...
Creating arbitrary quantum vibrational states in a carbon nanotube
... qubits [7,8] and consists of the following steps. Two-electron spin states split by a magnetic field are defined as our qubit. The qubit flip, the qubit-phonon swap, and the phase operations are applied alternately to obtain an arbitrary quantum vibration state of the CNT. The qubit is flipped from ...
... qubits [7,8] and consists of the following steps. Two-electron spin states split by a magnetic field are defined as our qubit. The qubit flip, the qubit-phonon swap, and the phase operations are applied alternately to obtain an arbitrary quantum vibration state of the CNT. The qubit is flipped from ...
Memory cost of quantum contextuality Linköping University Post Print
... while for perfect observables QM predicts hχi = 6 [22]. Here, the term hABCi denotes the average value of the product of the outcomes of A, B and C if these observables are measured simultaneously or in sequence on the same quantum system. The violation is independent of the quantum state, which emp ...
... while for perfect observables QM predicts hχi = 6 [22]. Here, the term hABCi denotes the average value of the product of the outcomes of A, B and C if these observables are measured simultaneously or in sequence on the same quantum system. The violation is independent of the quantum state, which emp ...
Mean-field theory of the Kondo effect in quantum dots with... Mikio Eto and Yuli V. Nazarov
... that T K(⌬) is maximal around ⌬⫽0 and decreases with increasing ⌬ obeying a power law, T K(⌬)⬀1/⌬ ␥ . The exponent ␥ is not universal but depends on a ratio of the initial coupling constants. Our results indicate that the Kondo effect is enhanced by the competition between singlet and triplet states ...
... that T K(⌬) is maximal around ⌬⫽0 and decreases with increasing ⌬ obeying a power law, T K(⌬)⬀1/⌬ ␥ . The exponent ␥ is not universal but depends on a ratio of the initial coupling constants. Our results indicate that the Kondo effect is enhanced by the competition between singlet and triplet states ...
Theory and experimental verification of Kapitza-Dirac-Talbot
... Kapitza and Dirac in 1933 [14], but nearly seventy years passed before the idea was experimentally implemented [15]. In contrast to that, the first optical phase grating for atoms was already realized in 1983 [16, 17] when a standing laser light field was tuned near to an atomic resonance in order t ...
... Kapitza and Dirac in 1933 [14], but nearly seventy years passed before the idea was experimentally implemented [15]. In contrast to that, the first optical phase grating for atoms was already realized in 1983 [16, 17] when a standing laser light field was tuned near to an atomic resonance in order t ...
Nonlocality in multipartite correlation networks LARS ERIK WÜRFLINGER
... Since its formulation in the 1920’s quantum mechanics has become the probably most successful and thoroughly tested physical theory. The mathematical formalism of quantum mechanics, developed as a response to the failure of the then-existing classical theories to explain phenomena such as black body ...
... Since its formulation in the 1920’s quantum mechanics has become the probably most successful and thoroughly tested physical theory. The mathematical formalism of quantum mechanics, developed as a response to the failure of the then-existing classical theories to explain phenomena such as black body ...
Pure Wave Mechanics and the Very Idea of Empirical Adequacy
... The second is the probability problem. Since the evolution of the state is deterministic and there is no epistemic uncertainty, it is unclear how to understand the standard quantum probabilities. As Everett explained it: In order to establish quantitative results, we must put some sort of measure (w ...
... The second is the probability problem. Since the evolution of the state is deterministic and there is no epistemic uncertainty, it is unclear how to understand the standard quantum probabilities. As Everett explained it: In order to establish quantitative results, we must put some sort of measure (w ...
Quantum Complementarity for the Superconducting Condensate and the Resulting Electrodynamic Duality. Abstract
... which one intends to measure ’the position of the electron’ [ read ’the phase of the superconductor’], otherwise these words have no meaning [3].” Today we might say that when we interpret experiments with quantum mechanics, we use a semi-classical approach and this approach requires that the quanti ...
... which one intends to measure ’the position of the electron’ [ read ’the phase of the superconductor’], otherwise these words have no meaning [3].” Today we might say that when we interpret experiments with quantum mechanics, we use a semi-classical approach and this approach requires that the quanti ...
Shor`s Factoring Algorithm and Modern Cryptography. An Illustration
... of the base 10 integers 48 through 57 respectively23 ), in no way affects the validity of any conclusions drawn below. This point understood, it next is necessary to choose the pair p and q of primes whose product yields the N our hypothetical Bob had broadcast for Alice’s use. I will choose the pai ...
... of the base 10 integers 48 through 57 respectively23 ), in no way affects the validity of any conclusions drawn below. This point understood, it next is necessary to choose the pair p and q of primes whose product yields the N our hypothetical Bob had broadcast for Alice’s use. I will choose the pai ...
Program and Booklet - Fakultät für Mathematik
... our previous proposal from loss- to fault-tolerance, we introduce a general and compact formalism that can also be applied to other related schemes (including non-all-optical ones such as [PRL 112, 250501]). With the help of this new representation we show that our communication protocol does not on ...
... our previous proposal from loss- to fault-tolerance, we introduce a general and compact formalism that can also be applied to other related schemes (including non-all-optical ones such as [PRL 112, 250501]). With the help of this new representation we show that our communication protocol does not on ...
Department of Physics MSc Handbook 2012/13 www.kcl.ac.uk/physics
... Appleton Layer. Again, and quite coincidentally, he was carrying out fundamental physics with very strong applications to communications. The most recent Nobel prize winner associated with the Physics Department is Professor Maurice Wilkins FRS (1916-2004), who shared the 1962 Nobel Prize for Physio ...
... Appleton Layer. Again, and quite coincidentally, he was carrying out fundamental physics with very strong applications to communications. The most recent Nobel prize winner associated with the Physics Department is Professor Maurice Wilkins FRS (1916-2004), who shared the 1962 Nobel Prize for Physio ...
Bell's theorem
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Bell's theorem is a ‘no-go theorem’ that draws an important distinction between quantum mechanics (QM) and the world as described by classical mechanics. This theorem is named after John Stewart Bell.In its simplest form, Bell's theorem states:Cornell solid-state physicist David Mermin has described the appraisals of the importance of Bell's theorem in the physics community as ranging from ""indifference"" to ""wild extravagance"". Lawrence Berkeley particle physicist Henry Stapp declared: ""Bell's theorem is the most profound discovery of science.""Bell's theorem rules out local hidden variables as a viable explanation of quantum mechanics (though it still leaves the door open for non-local hidden variables). Bell concluded:Bell summarized one of the least popular ways to address the theorem, superdeterminism, in a 1985 BBC Radio interview: