Cryptographic distinguishability measures for quantum
... rameterized by between the two families vanishes exponentially fast. A priori, this exponential convergence could depend upon which distinguishability measure is chosen—after all, the quantummechanical measurements optimal for each distinguishability measure can be quite different. However, with the ...
... rameterized by between the two families vanishes exponentially fast. A priori, this exponential convergence could depend upon which distinguishability measure is chosen—after all, the quantummechanical measurements optimal for each distinguishability measure can be quite different. However, with the ...
Finite temperature correlations of the Ising chain in transverse field
... σx (i), σz (i) are Pauli matrices on a chain of sites i. This model has a T = 0 quantum phase transition5,6 at g = gc = 1 from a state with long-range-order with hσz i 6= 0 (g < gc ), to a gapped quantum paramagnet (g > gc ). The dynamic critical exponent is z = 1 and the correlation length exponent ...
... σx (i), σz (i) are Pauli matrices on a chain of sites i. This model has a T = 0 quantum phase transition5,6 at g = gc = 1 from a state with long-range-order with hσz i 6= 0 (g < gc ), to a gapped quantum paramagnet (g > gc ). The dynamic critical exponent is z = 1 and the correlation length exponent ...
QB abstracts compiled 160613
... The problem of proving, or disproving SIC existence (i.e. maximal sets of equiangular lines in CAcl, or symmetric informationally complete positive operator valued measures in the physics literature) in every finite dimension has been the focus of much effort since the work of Zauner in the 1990 1s, ...
... The problem of proving, or disproving SIC existence (i.e. maximal sets of equiangular lines in CAcl, or symmetric informationally complete positive operator valued measures in the physics literature) in every finite dimension has been the focus of much effort since the work of Zauner in the 1990 1s, ...
PDF only - at www.arxiv.org.
... Ψ as well. However, any such inclusive conception would have to revise, not only our notion of the states of atomic objects, but of macroscopic objects also. This point was best illustrated by Schrödinger in his famous 'cat paradox'. A single photon in a state of superposition is connected to a dete ...
... Ψ as well. However, any such inclusive conception would have to revise, not only our notion of the states of atomic objects, but of macroscopic objects also. This point was best illustrated by Schrödinger in his famous 'cat paradox'. A single photon in a state of superposition is connected to a dete ...
slides on Quantum Isometry Groups
... structure, namely a real structure, which we describe below. A real structure for an odd spectral triple (A∞ , H, D) is given by a (possibly unbounded, invertible) closed anti-linear operator J̃ on H such that D := Dom(D) ⊆ Dom(J̃), J̃D ⊆ D, J̃ commutes with D on D, and the antilinear isometry J obt ...
... structure, namely a real structure, which we describe below. A real structure for an odd spectral triple (A∞ , H, D) is given by a (possibly unbounded, invertible) closed anti-linear operator J̃ on H such that D := Dom(D) ⊆ Dom(J̃), J̃D ⊆ D, J̃ commutes with D on D, and the antilinear isometry J obt ...
Quantum Computing
... polynomial-time algorithms for finding prime factors and discrete logarithms, problems widely believed to require exponential time on classical computers. Simon and Shor both presented their discoveries at the 1994, “Algorithms for quantum computation: Discrete logarithms and factoring“. Isaac L. ...
... polynomial-time algorithms for finding prime factors and discrete logarithms, problems widely believed to require exponential time on classical computers. Simon and Shor both presented their discoveries at the 1994, “Algorithms for quantum computation: Discrete logarithms and factoring“. Isaac L. ...
PPT1
... This effectively means that the destruction and the creation operators for particles in the Bose-Einstein condensate are replaced by a number ...
... This effectively means that the destruction and the creation operators for particles in the Bose-Einstein condensate are replaced by a number ...
Reflection Symmetry and Energy-Level Ordering in Frustrated Spin
... The spin of M can be found by constructing a trial state being a positive superposition of (shifted) Ising basic states and having a definite value of the spin. Then it will overlap with M. The uniqueness of the relative GS then implies that both states have the same spin. As a result, ...
... The spin of M can be found by constructing a trial state being a positive superposition of (shifted) Ising basic states and having a definite value of the spin. Then it will overlap with M. The uniqueness of the relative GS then implies that both states have the same spin. As a result, ...
Introduction to quantum Fisher information
... The subject of this paper is a mathematical transition from the Fisher information of classical statistics to the matrix formalism of quantum theory. If the monotonicity is the main requirement, then there are several quantum versions parametrized by a function. In physical applications the minimal ...
... The subject of this paper is a mathematical transition from the Fisher information of classical statistics to the matrix formalism of quantum theory. If the monotonicity is the main requirement, then there are several quantum versions parametrized by a function. In physical applications the minimal ...
Towards a Quantum Field Theory of Mind
... summarize the results of my published investigations, (Wolf, 1984; 1986b; 1989; 1998; 2010). They show that acausality and mind are related and how mind can be accounted for in quantum physical terms. Idea 1 Even though Cramer’s account gave the correct mathematical calculation of the probability in ...
... summarize the results of my published investigations, (Wolf, 1984; 1986b; 1989; 1998; 2010). They show that acausality and mind are related and how mind can be accounted for in quantum physical terms. Idea 1 Even though Cramer’s account gave the correct mathematical calculation of the probability in ...
Document
... GaAs qubits in quantum dots (Lars Schreiber) qubits in quantum dots (Lars Schreiber) Longest coherence time of all electrically ongest coherence time of all electrically ...
... GaAs qubits in quantum dots (Lars Schreiber) qubits in quantum dots (Lars Schreiber) Longest coherence time of all electrically ongest coherence time of all electrically ...
Dynamical quantum-electrodynamics embedding: Combining time
... been performed to understand the plasmonic coupling between metallic nanostructures and molecule-metallic hybrid nanostructure systems,24–28 revealing the importance of quantum effect at sub-nanometer contacting regime. However, due to numerical constraints, only nanostructures involving hundreds of ...
... been performed to understand the plasmonic coupling between metallic nanostructures and molecule-metallic hybrid nanostructure systems,24–28 revealing the importance of quantum effect at sub-nanometer contacting regime. However, due to numerical constraints, only nanostructures involving hundreds of ...
How Many Query Superpositions Are Needed to Learn?
... (or query complexity) required by exact learners. Our aim is to obtain lower and upper bounds on the query complexity that are valid under any choice of queries defining the learning game. According to the first goal, we introduce in Sect. 3 the quantum protocol concept, a notion that allows us to d ...
... (or query complexity) required by exact learners. Our aim is to obtain lower and upper bounds on the query complexity that are valid under any choice of queries defining the learning game. According to the first goal, we introduce in Sect. 3 the quantum protocol concept, a notion that allows us to d ...
University of Maryland, Baltimore County
... 1. NASA lidar group did studies on one of the best reported commercial InGaAs photon counting APD product and found that within the claimed 10% DE, the portion of total counts caused by after-pulsing is 600% of that of the light count. 2. A test of after-pulsing duration can be done by increasing th ...
... 1. NASA lidar group did studies on one of the best reported commercial InGaAs photon counting APD product and found that within the claimed 10% DE, the portion of total counts caused by after-pulsing is 600% of that of the light count. 2. A test of after-pulsing duration can be done by increasing th ...
Quantum computing
Quantum computing studies theoretical computation systems (quantum computers) that make direct use of quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Quantum computers are different from digital computers based on transistors. Whereas digital computers require data to be encoded into binary digits (bits), each of which is always in one of two definite states (0 or 1), quantum computation uses quantum bits (qubits), which can be in superpositions of states. A quantum Turing machine is a theoretical model of such a computer, and is also known as the universal quantum computer. Quantum computers share theoretical similarities with non-deterministic and probabilistic computers. The field of quantum computing was initiated by the work of Yuri Manin in 1980, Richard Feynman in 1982, and David Deutsch in 1985. A quantum computer with spins as quantum bits was also formulated for use as a quantum space–time in 1968.As of 2015, the development of actual quantum computers is still in its infancy, but experiments have been carried out in which quantum computational operations were executed on a very small number of quantum bits. Both practical and theoretical research continues, and many national governments and military agencies are funding quantum computing research in an effort to develop quantum computers for civilian, business, trade, and national security purposes, such as cryptanalysis.Large-scale quantum computers will be able to solve certain problems much more quickly than any classical computers that use even the best currently known algorithms, like integer factorization using Shor's algorithm or the simulation of quantum many-body systems. There exist quantum algorithms, such as Simon's algorithm, that run faster than any possible probabilistic classical algorithm.Given sufficient computational resources, however, a classical computer could be made to simulate any quantum algorithm, as quantum computation does not violate the Church–Turing thesis.