TALK - ECM-UB
... Linearization stability II • The integral is independent of hypersurface and variation of metric. Thus get ...
... Linearization stability II • The integral is independent of hypersurface and variation of metric. Thus get ...
Basic concepts in quantum mechanics
... the outcome of a quantum experiment is not a deterministic quantity, but rather a random number: if the same experiment is repeated several times, the measuring apparatus may show different numbers: it is only their statistics that is meaningful, i.e. we can ask what the probability that the gauge i ...
... the outcome of a quantum experiment is not a deterministic quantity, but rather a random number: if the same experiment is repeated several times, the measuring apparatus may show different numbers: it is only their statistics that is meaningful, i.e. we can ask what the probability that the gauge i ...
ON THE GENERAL FORM OF QUANTUM STOCHASTIC
... The quantum …ltering theory, which was outlined in [1, 2] and developed then since [3], provides the derivations for new types of irreversible stochastic equations for quantum states, giving the dynamical solution for the well-known quantum measurement problem. Some particular types of such equation ...
... The quantum …ltering theory, which was outlined in [1, 2] and developed then since [3], provides the derivations for new types of irreversible stochastic equations for quantum states, giving the dynamical solution for the well-known quantum measurement problem. Some particular types of such equation ...
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 ...
Initial condition dependence and wave function
... simplifications that can lead to more tractable models. One further simplification would be to consider non-relativistic models. As the nonrelativistic limits of Quantum Field Theory and General Relativity are, respectively, ordinary Quantum Mechanics and Newtonian gravity, one possibility is to con ...
... simplifications that can lead to more tractable models. One further simplification would be to consider non-relativistic models. As the nonrelativistic limits of Quantum Field Theory and General Relativity are, respectively, ordinary Quantum Mechanics and Newtonian gravity, one possibility is to con ...
A Brief Review on Quantum Bit Commitment
... a no-go theorem showing that unconditionally secure QBC is impossible unless relativistic effects are used. This impossibility comes from the fact that a cheating strategy using EPR pairs can always be implemented. Thus, different approaches have been presented in order to avoid the no-go theorem [1 ...
... a no-go theorem showing that unconditionally secure QBC is impossible unless relativistic effects are used. This impossibility comes from the fact that a cheating strategy using EPR pairs can always be implemented. Thus, different approaches have been presented in order to avoid the no-go theorem [1 ...
Quantum Galactic Dynamics - The fine structure constant
... derived using Schrödinger quantum theory in much the same way as it was used in developing the theory of atomic structure. The theoretical structure to be developed in this papers is a hybrid formulation involving three fundamental theoretical facets, general relativity, Schrödinger quantum mechan ...
... derived using Schrödinger quantum theory in much the same way as it was used in developing the theory of atomic structure. The theoretical structure to be developed in this papers is a hybrid formulation involving three fundamental theoretical facets, general relativity, Schrödinger quantum mechan ...
Quantum Field Theories in Curved Spacetime - Unitn
... in general, of any continuous isometry, leads to the absence of a preferred, symmetry invariant, reference quantum state on a hand, on the other hand it implies the lack of symmetryinvariant notion of elementary particle. Secondly, appearance of unitarily inequivalent representations of the field op ...
... in general, of any continuous isometry, leads to the absence of a preferred, symmetry invariant, reference quantum state on a hand, on the other hand it implies the lack of symmetryinvariant notion of elementary particle. Secondly, appearance of unitarily inequivalent representations of the field op ...
Turing Machine
... solved on a piece of paper in under an hour, when the number of cities is increased to 70, the problem becomes too complex for even a supercomputer. While a DNA computer takes much longer than a normal computer to perform each individual calculation, it performs an enormous number of operations at a ...
... solved on a piece of paper in under an hour, when the number of cities is increased to 70, the problem becomes too complex for even a supercomputer. While a DNA computer takes much longer than a normal computer to perform each individual calculation, it performs an enormous number of operations at a ...
Quantum annealing with manufactured spins
... this probability has a strong T dependence for td , tfreeze, its measurement provides us with an independent check on the effective temperature of the spin system in this regime. Moreover, because the probability does not saturate at 45 mK, where tfreeze saturates, it is a clear indication that satu ...
... this probability has a strong T dependence for td , tfreeze, its measurement provides us with an independent check on the effective temperature of the spin system in this regime. Moreover, because the probability does not saturate at 45 mK, where tfreeze saturates, it is a clear indication that satu ...
The Discovery of Dirac Equation and its Impact on Present
... and secondly the original positive energy electron jumps down and fills up the hole, with absorption (or emission) of a ry. This new kind of process just makes up for those excluded and restores the validity of the scattering formula derived on the assumption of the possibility of intermediate state ...
... and secondly the original positive energy electron jumps down and fills up the hole, with absorption (or emission) of a ry. This new kind of process just makes up for those excluded and restores the validity of the scattering formula derived on the assumption of the possibility of intermediate state ...
Experimental Optimal Cloning of Four
... HOM interference between the two photon ququarts impinging on modes ks and ka of BS1. The ancillary photon was prepared in the same quantum state as the signal photon, in order for the interference to occur. The twophoton coincidence counts were measured as a function of the optical path delay betwe ...
... HOM interference between the two photon ququarts impinging on modes ks and ka of BS1. The ancillary photon was prepared in the same quantum state as the signal photon, in order for the interference to occur. The twophoton coincidence counts were measured as a function of the optical path delay betwe ...
Charged Particle in an Electromagnetic Field
... probability distribution for energy; and the Hamiltonian defines the time evolution of the system. The question arises whether or not these physical aspects of the Hamiltonian operator are in fact influenced by a gauge transformation of the potentials. If so, this would be a Very Bad Thing. Fortunat ...
... probability distribution for energy; and the Hamiltonian defines the time evolution of the system. The question arises whether or not these physical aspects of the Hamiltonian operator are in fact influenced by a gauge transformation of the potentials. If so, this would be a Very Bad Thing. Fortunat ...
Complexity of one-dimensional spin chains
... instance of the problem L, we can find an instance of L’with the same answer (yes/no). A problem L is complete for QMA if it is in QMA and any other problem in QMA can be reduced to L. Complete problems are the hardest problems in QMA -- if you can solve a QMA-complete problem, you can solve any QMA ...
... instance of the problem L, we can find an instance of L’with the same answer (yes/no). A problem L is complete for QMA if it is in QMA and any other problem in QMA can be reduced to L. Complete problems are the hardest problems in QMA -- if you can solve a QMA-complete problem, you can solve any QMA ...