quant-ph/0205032 PDF
... pertaining to one station is independent of the setting of the other (if this assumption is not made, it is of course possible to reproduce the statistical predictions of quantum mechanics and thereby violate the Bell Inequalities). The second of Hess and Philipp’s claims, quoted above, is false; th ...
... pertaining to one station is independent of the setting of the other (if this assumption is not made, it is of course possible to reproduce the statistical predictions of quantum mechanics and thereby violate the Bell Inequalities). The second of Hess and Philipp’s claims, quoted above, is false; th ...
Macroscopicity of Mechanical Quantum Superposition States
... normalized phase-space distribution, whose standard deviations for the position and the momentum variable will be denoted by σs and σq . The von Neumann equation is reobtained for σs = σq = 0. The modification (1) serves its purpose of classicalizing the motion of a single particle: It effects a dec ...
... normalized phase-space distribution, whose standard deviations for the position and the momentum variable will be denoted by σs and σq . The von Neumann equation is reobtained for σs = σq = 0. The modification (1) serves its purpose of classicalizing the motion of a single particle: It effects a dec ...
Quantum evolution according to real clocks - E
... ern day atomic clocks, it is nonetheless always present to some extent. In other words, the third law of thermodynamics forbids the existence of ideal clocks. We will study, within the context of the standard quantum theory, the evolution of an arbitrary system according to a real clock. Unlike othe ...
... ern day atomic clocks, it is nonetheless always present to some extent. In other words, the third law of thermodynamics forbids the existence of ideal clocks. We will study, within the context of the standard quantum theory, the evolution of an arbitrary system according to a real clock. Unlike othe ...
Quantum computers
... • Quantum computers use quantum-mechanical phenomena to represent and process data • Quantum mechanics can be described with three basic postulates – The superposition principle - tells us what states are possible in a quantum system – The measurement principle - tells us how much information about ...
... • Quantum computers use quantum-mechanical phenomena to represent and process data • Quantum mechanics can be described with three basic postulates – The superposition principle - tells us what states are possible in a quantum system – The measurement principle - tells us how much information about ...
ANTI-MATTER FROM PRIMORDIAL BLACK HOLES
... Within the Wheeler, Misner and DeWitt QGD, the BB singularity is not resolved could it be different in the specific quantum theory of Riemannian geometry called LQG? KEY questions: How close to the BB does smooth space-time make sense ? Is inflation safe ? Is the BB singularity solved as the hydro ...
... Within the Wheeler, Misner and DeWitt QGD, the BB singularity is not resolved could it be different in the specific quantum theory of Riemannian geometry called LQG? KEY questions: How close to the BB does smooth space-time make sense ? Is inflation safe ? Is the BB singularity solved as the hydro ...
Reflections on Friction in Quantum Mechanics
... This process, by itself, is reversible. Simply reversing the field-change protocol will yield back the original state and the original energy. The evolution is reversible because it is a unitary dynamics. However, consider appending a non-unitary step to the process. Now we leave the field at its fi ...
... This process, by itself, is reversible. Simply reversing the field-change protocol will yield back the original state and the original energy. The evolution is reversible because it is a unitary dynamics. However, consider appending a non-unitary step to the process. Now we leave the field at its fi ...
Qubit metrology for building a fault-tolerant quantum
... can vary in amplitude, duration and frequency. More fundamentally, the Heisenberg uncertainty principle states that it is impossible to directly stabilise a single qubit as any measurement of a bit-flip error will produce a random flip in phase. The key to quantum error correction is measuring qubit p ...
... can vary in amplitude, duration and frequency. More fundamentally, the Heisenberg uncertainty principle states that it is impossible to directly stabilise a single qubit as any measurement of a bit-flip error will produce a random flip in phase. The key to quantum error correction is measuring qubit p ...
Spontaneous Dimensional Reduction in Quantum Gravity
... spectral dimension dS , determined from the “return probability” K(x, x; s) ∼ (4πs)−dS /2 . These estimators assume a Riemannian (positive definite) metric, and their application to spacetimes requires analytic continuation, which might distort the physics [5]. There are, however, several Lorentzian ...
... spectral dimension dS , determined from the “return probability” K(x, x; s) ∼ (4πs)−dS /2 . These estimators assume a Riemannian (positive definite) metric, and their application to spacetimes requires analytic continuation, which might distort the physics [5]. There are, however, several Lorentzian ...
Document
... and postselect in (X - Y) + B, you know the particle was in B. But this is the same as preparing (B + Y) + X and postselecting (B - Y) + X, which means you also know the particle was in X. If P(B) = 1 and P(X) = 1, where was the particle really? But back up: is there any physical sense in which this ...
... and postselect in (X - Y) + B, you know the particle was in B. But this is the same as preparing (B + Y) + X and postselecting (B - Y) + X, which means you also know the particle was in X. If P(B) = 1 and P(X) = 1, where was the particle really? But back up: is there any physical sense in which this ...
Document
... Classically, we believe that, in principle, if we are very careful, we can always extract a property of a system without disturbing the system. If we have two properties (e.g. momemtum and position), we can make a measurement to extract the first property and another measurement to extract the secon ...
... Classically, we believe that, in principle, if we are very careful, we can always extract a property of a system without disturbing the system. If we have two properties (e.g. momemtum and position), we can make a measurement to extract the first property and another measurement to extract the secon ...
College 10: Quantum computing
... At interaction with an observer, the qubit takes on the value 0 with probability |α0 |2 , and the value 1 with probability |α1 |2 . After such an interaction the qubit is no longer in superposition, but in a single state 0 or 1. For simplicity we assume that α0 , α1 ∈ R. (They can be negative !) ...
... At interaction with an observer, the qubit takes on the value 0 with probability |α0 |2 , and the value 1 with probability |α1 |2 . After such an interaction the qubit is no longer in superposition, but in a single state 0 or 1. For simplicity we assume that α0 , α1 ∈ R. (They can be negative !) ...
Quantum Public-Key Cryptosystems
... while QPKC employs only a classical channel. The security assumption for a QC scheme is quantum mechanics (believed by most physicists), while that for a QPKC scheme is a computational assumption (e.g., existence of a one-way function) in the QTM model. Although several experimental QC systems have ...
... while QPKC employs only a classical channel. The security assumption for a QC scheme is quantum mechanics (believed by most physicists), while that for a QPKC scheme is a computational assumption (e.g., existence of a one-way function) in the QTM model. Although several experimental QC systems have ...
Paper
... double-peak profiles observed in (1) may indicate an increasing importance of LDA violation, but it does not provide evidence for a quantum phase transition. Indeed, recent more detailed experiments (6) have observed shell structures at small imbalances and seem to rule out the quantum phase transit ...
... double-peak profiles observed in (1) may indicate an increasing importance of LDA violation, but it does not provide evidence for a quantum phase transition. Indeed, recent more detailed experiments (6) have observed shell structures at small imbalances and seem to rule out the quantum phase transit ...
