QMDuesseldorf - Buffalo Ontology Site
... In relation to the lifeworld of common sense realism holds with unrestricted validity -- indeed we can derive the truths of folk physics rigorously from quantum mechanical laws ... by moving from finer-grained to coarser-grained histories ...
... In relation to the lifeworld of common sense realism holds with unrestricted validity -- indeed we can derive the truths of folk physics rigorously from quantum mechanical laws ... by moving from finer-grained to coarser-grained histories ...
glossery - Paradigm Shift Now
... maximizes its entropy. Prigogine and his advocates feel they have developed a mathematical Theory of Dissipative Structures which is very important to the physical and social sciences; accounting for such phenomena as the Great Red Spot on Jupiter, and perhaps even life itself. Other scientists, inc ...
... maximizes its entropy. Prigogine and his advocates feel they have developed a mathematical Theory of Dissipative Structures which is very important to the physical and social sciences; accounting for such phenomena as the Great Red Spot on Jupiter, and perhaps even life itself. Other scientists, inc ...
PPT - Fernando Brandao
... • But for general (mixed) states, the analogy breaks down: there is bound entanglement... ...
... • But for general (mixed) states, the analogy breaks down: there is bound entanglement... ...
Effective Field Theory Approach to Gravitationally Induced
... that any given quantum system is open, unavoidably interacting with unobserved environmental degrees of freedom that will cause initial quantum superposition states of the system to decohere, resulting in classical mixtures of either-or alternatives [1–3]. Consider, for example, a system consisting ...
... that any given quantum system is open, unavoidably interacting with unobserved environmental degrees of freedom that will cause initial quantum superposition states of the system to decohere, resulting in classical mixtures of either-or alternatives [1–3]. Consider, for example, a system consisting ...
61, 062310 (2000)
... out this cloning and identification. Quantum networks for universal cloning have been proposed by Bužek et al. 关21兴. Chelfes and Barnett 关17兴 have constructed the cloning machine in a two-state system. In this paper we provide a method to realize probabilistic identification and cloning for an n-st ...
... out this cloning and identification. Quantum networks for universal cloning have been proposed by Bužek et al. 关21兴. Chelfes and Barnett 关17兴 have constructed the cloning machine in a two-state system. In this paper we provide a method to realize probabilistic identification and cloning for an n-st ...
Quantum critical temperature of a modulated oscillator Lingzhen Guo, Vittorio Peano, M. Marthaler,
... and the occurrence of switching mechanisms that have no analog in equilibrium systems. The switching is important also for applications in quantum information [2–9]. For a resonantly modulated oscillator, a major quantum mechanism of switching is quantum activation [10,11]: transitions over an effec ...
... and the occurrence of switching mechanisms that have no analog in equilibrium systems. The switching is important also for applications in quantum information [2–9]. For a resonantly modulated oscillator, a major quantum mechanism of switching is quantum activation [10,11]: transitions over an effec ...
Complexity Limitations on Quantum Computation 1 Introduction
... comes from new and good theoretical models for quantum Turing machines [BV97] and surprising algorithms for factoring [Sho97] and searching [Gro96]. Exactly how much can we accomplish with quantum computers? We bring two powerful tools from computational complexity theory to bear on this question. F ...
... comes from new and good theoretical models for quantum Turing machines [BV97] and surprising algorithms for factoring [Sho97] and searching [Gro96]. Exactly how much can we accomplish with quantum computers? We bring two powerful tools from computational complexity theory to bear on this question. F ...
Quantum Computing and Communications
... its correctness do no satisfy an engineer. She/he always wants to know the way leading from the definition of the problem via system model construction and a logic chain of thoughts before reaching the answer to the original problem. If this ’special’ viewpoint is omitted, which happens often when t ...
... its correctness do no satisfy an engineer. She/he always wants to know the way leading from the definition of the problem via system model construction and a logic chain of thoughts before reaching the answer to the original problem. If this ’special’ viewpoint is omitted, which happens often when t ...
What can string theory teach us about condensed matter physics?
... translationally-invariant quantum system with a globally conserved U(1) charge Q (the “electron density”) in spatial dimension d > 1. • Describe zero temperature phases where d�Q�/dµ �= 0, where µ (the “chemical potential”) which changes the Hamiltonian, H, to H − µQ. • Compressible systems must be ...
... translationally-invariant quantum system with a globally conserved U(1) charge Q (the “electron density”) in spatial dimension d > 1. • Describe zero temperature phases where d�Q�/dµ �= 0, where µ (the “chemical potential”) which changes the Hamiltonian, H, to H − µQ. • Compressible systems must be ...
Spontaneous Dimensional Reduction in Quantum Gravity
... 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 alternatives. The “causal spectral dimension” [6] exploits the relationship between two ran ...
... 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 alternatives. The “causal spectral dimension” [6] exploits the relationship between two ran ...
Orbitals Package Examples Introduction Initialization
... Here are the angular parts of all the real orbitals up to the f orbitals. Plots are of the squares of the angular parts, with lobes red for positive angular parts, cyan for negative. Leftmost orbital is , rightmost is . (To see the code, check "show input" under table/properties.). Run the table wit ...
... Here are the angular parts of all the real orbitals up to the f orbitals. Plots are of the squares of the angular parts, with lobes red for positive angular parts, cyan for negative. Leftmost orbital is , rightmost is . (To see the code, check "show input" under table/properties.). Run the table wit ...
Locating the quantum critical point of the Bose
... The third and higher derivatives of fs are divergent at the critical point of the classical 3D XY model. Going back from the classical 3D XY model to the quantum 2D Bose-Hubbard model, we expect that the third derivative of the ground-state energy will be singular. This translates into the divergent ...
... The third and higher derivatives of fs are divergent at the critical point of the classical 3D XY model. Going back from the classical 3D XY model to the quantum 2D Bose-Hubbard model, we expect that the third derivative of the ground-state energy will be singular. This translates into the divergent ...
Quantum key distribution
Quantum key distribution (QKD) uses quantum mechanics to guarantee secure communication. It enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages. It is often incorrectly called quantum cryptography, as it is the most well known example of the group of quantum cryptographic tasks.An important and unique property of quantum key distribution is the ability of the two communicating users to detect the presence of any third party trying to gain knowledge of the key. This results from a fundamental aspect of quantum mechanics: the process of measuring a quantum system in general disturbs the system. A third party trying to eavesdrop on the key must in some way measure it, thus introducing detectable anomalies. By using quantum superpositions or quantum entanglement and transmitting information in quantum states, a communication system can be implemented which detects eavesdropping. If the level of eavesdropping is below a certain threshold, a key can be produced that is guaranteed to be secure (i.e. the eavesdropper has no information about it), otherwise no secure key is possible and communication is aborted.The security of encryption that uses quantum key distribution relies on the foundations of quantum mechanics, in contrast to traditional public key cryptography which relies on the computational difficulty of certain mathematical functions, and cannot provide any indication of eavesdropping at any point in the communication process, or any mathematical proof as to the actual complexity of reversing the one-way functions used. QKD has provable security based on information theory, and forward secrecy.Quantum key distribution is only used to produce and distribute a key, not to transmit any message data. This key can then be used with any chosen encryption algorithm to encrypt (and decrypt) a message, which can then be transmitted over a standard communication channel. The algorithm most commonly associated with QKD is the one-time pad, as it is provably secure when used with a secret, random key. In real world situations, it is often also used with encryption using symmetric key algorithms like the Advanced Encryption Standard algorithm. In the case of QKD this comparison is based on the assumption of perfect single-photon sources and detectors, that cannot be easily implemented.