Destructive quantum interference in spin tunneling problems
... PACS numbers: 75.10.Jm, 75.50.Lk, 73.40.Gk ...
... PACS numbers: 75.10.Jm, 75.50.Lk, 73.40.Gk ...
Macroscopic Local Realism: How Do We Define It and Is It
... position) on the particle at B. Now the ``locality'' assumption tells us that the measurement at B could not have disturbed the system at A. Hence, EPR reason, because one can predict precisely the result of the measurement of position of particle A without disturbing the system, ``realism'' implies ...
... position) on the particle at B. Now the ``locality'' assumption tells us that the measurement at B could not have disturbed the system at A. Hence, EPR reason, because one can predict precisely the result of the measurement of position of particle A without disturbing the system, ``realism'' implies ...
Far-infrared-driven electron-hole correlations in a quantum dot with an internal... Roger Sakhel, Lars Jo¨nsson, and John W. Wilkins
... Roger Sakhel, Lars Jönsson, and John W. Wilkins Department of Physics, The Ohio State University, Columbus, Ohio 43210-1106 共Received 18 December 2000; published 27 September 2001兲 Laser excited and FIR-driven, time-dependent electron-hole correlations in a prototypical GaAs quantum dot with an int ...
... Roger Sakhel, Lars Jönsson, and John W. Wilkins Department of Physics, The Ohio State University, Columbus, Ohio 43210-1106 共Received 18 December 2000; published 27 September 2001兲 Laser excited and FIR-driven, time-dependent electron-hole correlations in a prototypical GaAs quantum dot with an int ...
ABSTRACT Title of Document:
... terms of making accurate predictions about the physical world to which it applies. This begs for an answer to the question: what is essentially different about the theory of quantum mechanics which makes it so difficult to interpret? Is it just that the world as revealed to us by quantum mechanics i ...
... terms of making accurate predictions about the physical world to which it applies. This begs for an answer to the question: what is essentially different about the theory of quantum mechanics which makes it so difficult to interpret? Is it just that the world as revealed to us by quantum mechanics i ...
Topological Photonics Lu, John D. Joannopoulos, and Marin Soljaˇci´c
... Topology is the branch of mathematics that concerns quantities that are preserved under continuous deformations. For example, the six objects in Fig. 1a all have different geometries; but there are only three different topologies. The yellow sphere can be continuously deformed into the white spoon, ...
... Topology is the branch of mathematics that concerns quantities that are preserved under continuous deformations. For example, the six objects in Fig. 1a all have different geometries; but there are only three different topologies. The yellow sphere can be continuously deformed into the white spoon, ...
Entanglement Entropy in a Triangular Billiard
... problem, and the diagonalization of the kernel can yield the Schmidt eigenvalues. 4. Geometric Dependence of Entanglement and the Irrationality of the Triangle The relationship between a quantum chaotic geometry and entanglement is already explored in different works. The triangular billiard exhibit ...
... problem, and the diagonalization of the kernel can yield the Schmidt eigenvalues. 4. Geometric Dependence of Entanglement and the Irrationality of the Triangle The relationship between a quantum chaotic geometry and entanglement is already explored in different works. The triangular billiard exhibit ...
hidden symmetry and explicit spheroidal eigenfunctions of the
... hybrids of the familiar Inim) hydrogen-atom states with fixed n and m but different 1 values. Explicit formulas and plots are given for a and g, and for the probability distributions derived from the hybrid wave functions, E,g, (a) Inlm), for all states up through n = 4. In the limit these hybrids b ...
... hybrids of the familiar Inim) hydrogen-atom states with fixed n and m but different 1 values. Explicit formulas and plots are given for a and g, and for the probability distributions derived from the hybrid wave functions, E,g, (a) Inlm), for all states up through n = 4. In the limit these hybrids b ...
Smooth Scaling of Valence Electronic Properties in Fullerenes: From
... self-interaction in the DFT local-density approximation. This self-interaction might be removed, but only with considerable computational cost. Using a di↵erent density functional, the e↵ect of the self-interaction was studied for atoms and small, well-behaved molecules [20]. It was found that the s ...
... self-interaction in the DFT local-density approximation. This self-interaction might be removed, but only with considerable computational cost. Using a di↵erent density functional, the e↵ect of the self-interaction was studied for atoms and small, well-behaved molecules [20]. It was found that the s ...
The presentation template
... Both speakers yesterday referred to how Schrödinger coined the term “entanglement” in 1935 (or earlier) "When two systems, …… enter into temporary physical interaction due to known forces between them, and …… separate again, then they can no longer be described in the same way as before, viz. by end ...
... Both speakers yesterday referred to how Schrödinger coined the term “entanglement” in 1935 (or earlier) "When two systems, …… enter into temporary physical interaction due to known forces between them, and …… separate again, then they can no longer be described in the same way as before, viz. by end ...
Three Roads To Quantum Gravity
... Similarly, physical theories differ in the basic assumptions they make about observation and reality. If we are not careful to spell them out, confusion can and will occur when we try to compare descriptions of the world that come out of different theories. In this book we shall be concerned with tw ...
... Similarly, physical theories differ in the basic assumptions they make about observation and reality. If we are not careful to spell them out, confusion can and will occur when we try to compare descriptions of the world that come out of different theories. In this book we shall be concerned with tw ...
Quantum Computer (Information) and Quantum Mechanical
... the processing of information (quantum computation) that the differentiation occurs. The ability to manipulate quantum information enables us to perform tasks that would be unachievable in a classical context, such as unconditionally secure transmission of information. Quantum information processing ...
... the processing of information (quantum computation) that the differentiation occurs. The ability to manipulate quantum information enables us to perform tasks that would be unachievable in a classical context, such as unconditionally secure transmission of information. Quantum information processing ...
agostino pr´astaro
... intrinsic and completely covariant way. This is obtained by introducing new spaces, derivative spaces, that are the natural universal spaces for differential calculus and PDEs. This point of view generalizes previous one introduced by Ehresmann and allows us to treat all the differential objects in al ...
... intrinsic and completely covariant way. This is obtained by introducing new spaces, derivative spaces, that are the natural universal spaces for differential calculus and PDEs. This point of view generalizes previous one introduced by Ehresmann and allows us to treat all the differential objects in al ...
Local unitary transformation, long-range quantum
... Since high-Tc superconductors do not break the timereversal and parity symmetries, nor any other lattice symmetries, some people concentrated on finding spin liquids that respect all those symmetries and hoping one of those symmetric spin liquids hold the key to understand high-Tc superconductors. B ...
... Since high-Tc superconductors do not break the timereversal and parity symmetries, nor any other lattice symmetries, some people concentrated on finding spin liquids that respect all those symmetries and hoping one of those symmetric spin liquids hold the key to understand high-Tc superconductors. B ...
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.