Results 31 to 40 of about 2,622,886 (289)

Quantum channels in quantum gravity [PDF]

International Journal of Modern Physics D, 2014
The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be embedded in the gauge/gravity context by invoking a path integral formalism inspired by the Schwinger ...
Rangamani, Mukund, Rota, Massimilliano
openaire   +4 more sources

Quantum Theory of Probability and Decisions [PDF]

, 1999
The probabilistic predictions of quantum theory are conventionally obtained from a special probabilistic axiom. But that is unnecessary because all the practical consequences of such predictions follow from the remaining, non-probabilistic, axioms of ...
Centre For Quantum Computation, David Deutsch, The Clarendon Laboratory   +2 more
core   +4 more sources

Renormalisation in quantum mechanics, quantum instantons and quantum chaos [PDF]

Nonlinear Analysis, 2001
We suggest how to construct non-perturbatively a renormalized action in quantum mechanics. We discuss similarties and differences with the standard effective action. We propose that the new quantum action is suitable to define and compute quantum instantons and quantum chaos.
Jirari, H., Kröger, H., Luo, X. Q., Moriarty, K. J. M.   +3 more
openaire   +3 more sources

Quantum bandits [PDF]

Quantum Machine Intelligence, 2020
We consider the quantum version of the bandit problem known as {\em best arm identification} (BAI). We first propose a quantum modeling of the BAI problem, which assumes that both the learning agent and the environment are quantum; we then propose an algorithm based on quantum amplitude amplification to solve BAI.
Giuseppe, Di Molfetta, Casalé, Balthazar, Di Molfetta, Giuseppe, Kadri, Hachem, Ralaivola, Liva   +4 more
openaire   +3 more sources

Quantum singular value transformation and beyond: exponential improvements for quantum matrix arithmetics [PDF]

, 2018
Quantum computing is powerful because unitary operators describing the time-evolution of a quantum system have exponential size in terms of the number of qubits present in the system.
Berry Dominic W., Brandão Fernando G. S. L., Brassard Gilles, Fernando G. S., Frostig Roy, Low Guang Hao, Nearly Optimal Hamiltonian Simulation, On, Quantum, Solvers Quantum, The, van Apeldoorn Joran   +11 more
core   +3 more sources

“Quantumness” versus “classicality” of quantum states and quantum protocols [PDF]

International Journal of Quantum Information, 2018
Entanglement is one of the pillars of quantum mechanics and quantum information processing, and as a result, the quantumness of nonentangled states has typically been overlooked and unrecognized until the last decade. We give a robust definition for the classicality versus quantumness of a single multipartite quantum state, a set of states, and a ...
Aharon Brodutch, Berry Groisman, Dan Kenigsberg, Tal Mor   +3 more
openaire   +2 more sources

Thermal Conductivity and Thermal Rectification in Graphene Nanoribbons: a Molecular Dynamics Study [PDF]

, 2009
We have used molecular dynamics to calculate the thermal conductivity of symmetric and asymmetric graphene nanoribbons (GNRs) of several nanometers in size (up to ~4 nm wide and ~10 nm long). For symmetric nanoribbons, the calculated thermal conductivity
Balandin A. A., Brenner D. W., Castro Neto A. H., Chang C. W., Chen Z., Geim A. K., Ghosh S., Han M. Y., Hoover W. G., Hunenberger P. H., Kim P., Li B., Li B., Nakada K., Nika D. L., Nosé S., Novoselov K. S., Novoselov K. S., Pierson H. O., Pop E., Son Y. W., Wang L., Wang L., Wu G., Wu G., Yamamoto T., Zhang G., Zhang Y.   +27 more
core   +1 more source

Quantum diagrams and quantum networks [PDF]

SPIE Proceedings, 2014
This paper is an introduction to diagrammatic methods for representing quantum processes and quantum computing. We review basic notions for quantum information and quantum computing. We discuss topological diagrams and some issues about using category theory in representing quantum computing and teleportation. We analyze very carefully the diagrammatic
Kauffman, Louis H., Lomonaco Jr, Samuel J.   +1 more
openaire   +2 more sources

Quantum Processors and Controllers [PDF]

, 2003
In this paper is presented an abstract theory of quantum processors and controllers, special kind of quantum computational network defined on a composite quantum system with two parts: the controlling and controlled subsystems.
Vlasov, Alexander Yu.
core   +5 more sources

Quantum automata and quantum grammars

Theoretical Computer Science, 2000
To study quantum computation, it might be helpful to generalize structures from language and automata theory to the quantum case. To that end, we propose quantum versions of finite-state and push-down automata, and regular and context-free grammars. We find analogs of several classical theorems, including pumping lemmas, closure properties, rational ...
Cristopher Moore, James P. Crutchfield
openaire   +3 more sources