On Many-Minds Interpretations of Quantum Theory
... theory which is not both ad hoc and incompatible with special relativity, these assertions may seem plausible (cf. Deutsch 1996). It is certainly the case that, at least over short time intervals, quantum states can be found which will give apparently accurate representations of the physical states ...
... theory which is not both ad hoc and incompatible with special relativity, these assertions may seem plausible (cf. Deutsch 1996). It is certainly the case that, at least over short time intervals, quantum states can be found which will give apparently accurate representations of the physical states ...
Spectrum analysis with quantum dynamical systems
... Recent technological advances, especially in optomechanics [1], suggest that quantum noise will soon be the major limiting factor in many metrological applications [2]. Many tasks in optomechanics force sensing, including thermometry, estimation of stochastic gravitational-wave background [3,4], and ...
... Recent technological advances, especially in optomechanics [1], suggest that quantum noise will soon be the major limiting factor in many metrological applications [2]. Many tasks in optomechanics force sensing, including thermometry, estimation of stochastic gravitational-wave background [3,4], and ...
QUANTUM SPIN GLASSES IN FINITE DIMENSIONS
... EA-model in d dimensions: H = − hiji Jij Siz Sjz , where now Si = ±1 are Ising spin variables. In this way the transverse field introduces quantum mechanics into the spin glass problem and the value of Γ tunes the strength of the quantum fluctuations. At zero temperature and Γ = 0 the system describ ...
... EA-model in d dimensions: H = − hiji Jij Siz Sjz , where now Si = ±1 are Ising spin variables. In this way the transverse field introduces quantum mechanics into the spin glass problem and the value of Γ tunes the strength of the quantum fluctuations. At zero temperature and Γ = 0 the system describ ...
Quantum Analysis on Time Behavior of a Lengthening Pendulum
... The pendulum or the lengthening thereof not only is a good mathematical model for practicing a nontrivial problem in mechanics but also can possibly be applied to many actual systems. A gravitational pendulum which has been used as a seismic sensor of translation and rotation is one of its well-know ...
... The pendulum or the lengthening thereof not only is a good mathematical model for practicing a nontrivial problem in mechanics but also can possibly be applied to many actual systems. A gravitational pendulum which has been used as a seismic sensor of translation and rotation is one of its well-know ...
Single and Entangled Photon Sources
... Another application for entanglement is with superdense coding. This involves sending of information through qubits as opposed to bits. A qubit is a unit of quantum information, such as the polarization of a photon, and as opposed to a bit can be 0, 1, or a superposition of both. If a sender and rec ...
... Another application for entanglement is with superdense coding. This involves sending of information through qubits as opposed to bits. A qubit is a unit of quantum information, such as the polarization of a photon, and as opposed to a bit can be 0, 1, or a superposition of both. If a sender and rec ...
On Quantum Generalizations of Information
... In this section we compare aspects of classical probability theory with their quantum analogue. Generalising probability distributions to density operators has many advantages. While probability distributions are generally over atomic symbols, a density operator can be considered a probability distr ...
... In this section we compare aspects of classical probability theory with their quantum analogue. Generalising probability distributions to density operators has many advantages. While probability distributions are generally over atomic symbols, a density operator can be considered a probability distr ...
Phys. Rev. Lett. 108, 100501 - APS Link Manager
... where E refers to the energy of the many-body state with the qubits in state jiA jiB (Fig. 1). Within the continuum limit of a classical crystal, Eint d2 =L for d aR , where d is the distance between the qubits and the ends of the quantum bus. Owing to quantum fluctuations, the classical cry ...
... where E refers to the energy of the many-body state with the qubits in state jiA jiB (Fig. 1). Within the continuum limit of a classical crystal, Eint d2 =L for d aR , where d is the distance between the qubits and the ends of the quantum bus. Owing to quantum fluctuations, the classical cry ...
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.