What is “a world”
... All is ( r1, r2 ,...., rN , t ) evolving according to deterministic equation ...
... All is ( r1, r2 ,...., rN , t ) evolving according to deterministic equation ...
q -entropies and the entanglement dynamics of two-qubits interacting with an... 408 A. Hamadou-Ibrahim et al.
... physical world. The multiple manifestations of quantum entanglement are currently the focus of intense and increasing research efforts. From the point of view of the foundations of physics, entanglement plays an important role, for example, in connection with the origin of the classical macroscopic ...
... physical world. The multiple manifestations of quantum entanglement are currently the focus of intense and increasing research efforts. From the point of view of the foundations of physics, entanglement plays an important role, for example, in connection with the origin of the classical macroscopic ...
1 Engineering Entanglement: Quantum Computation, Quantum
... development of quantum information, the applications of quantum principles to computation, communications, and other information processing problems. Although entanglement is not the only substantial element of quantum information, it nonetheless constitutes the intellectual core of quantum informat ...
... development of quantum information, the applications of quantum principles to computation, communications, and other information processing problems. Although entanglement is not the only substantial element of quantum information, it nonetheless constitutes the intellectual core of quantum informat ...
Steering criteria and steerability witnesses
... – Many experiments realised since then strongly follow the quantum mechanical predictions, and (up to some loopholes involving Eric Cavalcanti, PIAF workshop, Sydney, February 2008 lack of space-like separation) support20 detection efficiencies and/or ...
... – Many experiments realised since then strongly follow the quantum mechanical predictions, and (up to some loopholes involving Eric Cavalcanti, PIAF workshop, Sydney, February 2008 lack of space-like separation) support20 detection efficiencies and/or ...
Realism and Antirealism in Informational Foundations of
... the truth value of a proposition or that it “carries” one bit of information only implies a statement concerning what can be said about possible measurement results. For us a system is no more than a representative of a proposition. [9, p. 326] Considering this, Zeilinger and Kofler describe the fou ...
... the truth value of a proposition or that it “carries” one bit of information only implies a statement concerning what can be said about possible measurement results. For us a system is no more than a representative of a proposition. [9, p. 326] Considering this, Zeilinger and Kofler describe the fou ...
QMLeipzig_June02 - Buffalo Ontology Site
... system, we can predict with certainty (i.e. with probability equal to unity) the value of a physical quantity, then there exists an element of physical reality corresponding to this physical quantity.” ...
... system, we can predict with certainty (i.e. with probability equal to unity) the value of a physical quantity, then there exists an element of physical reality corresponding to this physical quantity.” ...
The structure of perturbative quantum gauge theories
... Renormalization as a decomposition in G The above Hopf algebra H is the algebraic structure underlying the recursive procedure of renormalization. In fact, for a character Uz : H → C, there exists a character Cz : H → C (‘counterterm’) defined for z 6= 0, such that Rz = Cz ∗ Uz is finite at z = 0 [ ...
... Renormalization as a decomposition in G The above Hopf algebra H is the algebraic structure underlying the recursive procedure of renormalization. In fact, for a character Uz : H → C, there exists a character Cz : H → C (‘counterterm’) defined for z 6= 0, such that Rz = Cz ∗ Uz is finite at z = 0 [ ...
Gaussian resolutions for equilibrium density matrices
... matrix. From now on we will refer to it as HSM. This method adapted the Gaussian wavepacket propagation techniques used previously to solve the real-time Schr€ odinger equation [6,7]. HSM reported results for 1D Morse and symmetric double-well potentials. Their general conclusion was that the method ...
... matrix. From now on we will refer to it as HSM. This method adapted the Gaussian wavepacket propagation techniques used previously to solve the real-time Schr€ odinger equation [6,7]. HSM reported results for 1D Morse and symmetric double-well potentials. Their general conclusion was that the method ...
Quantum Theory Looks at Time Travel
... figurative, and their role is merely to couple the two incoming channels to two outgoing channels. The operator G1 represents the ordinary time development in the absence of time feedback. The operator G2 represents an alternate possible time evolution that can take place and compete with G1 because ...
... figurative, and their role is merely to couple the two incoming channels to two outgoing channels. The operator G1 represents the ordinary time development in the absence of time feedback. The operator G2 represents an alternate possible time evolution that can take place and compete with G1 because ...
pdf
... success probability from a small quantity δ to a constant in O(1/ δ) steps, whereas, in general a classical algorithm for this would require Ω(1/δ) steps. This basic algorithm has been refined, taking into account the number of solutions and the desired final success probability 1 − . For example, ...
... success probability from a small quantity δ to a constant in O(1/ δ) steps, whereas, in general a classical algorithm for this would require Ω(1/δ) steps. This basic algorithm has been refined, taking into account the number of solutions and the desired final success probability 1 − . For example, ...
Quantum noise properties of multiphoton transitions in driven nonlinear resonators
... also nanomechanical devices which have been successfully realized in the deep quantum regime only recently [9–11]. In addition, quantum transport devices on the basis of molecular junctions have been realized where the interplay of charge transport and vibrational properties of the molecular bridge ...
... also nanomechanical devices which have been successfully realized in the deep quantum regime only recently [9–11]. In addition, quantum transport devices on the basis of molecular junctions have been realized where the interplay of charge transport and vibrational properties of the molecular bridge ...
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.