Quantum networking with single ions J¨ urgen Eschner
... Possible causes of decoherence in this process of generating a pure single-photon quantum state include both technical deficiencies and fundamental issues. On the technical side, any jitter in the emission time or frequency, resulting for example from fluctuations in the laser frequency or intensity ...
... Possible causes of decoherence in this process of generating a pure single-photon quantum state include both technical deficiencies and fundamental issues. On the technical side, any jitter in the emission time or frequency, resulting for example from fluctuations in the laser frequency or intensity ...
Coupled quantum dots as quantum gates
... terdot distance, i.e., for 2a@2a B , where a is half the distance between the centers of the dots, and a B5 A\/m v 0 is the effective Bohr radius of a single isolated harmonic well. This choice for the potential is motivated by the experimental fact5 that the spectrum of single dots in GaAs is well ...
... terdot distance, i.e., for 2a@2a B , where a is half the distance between the centers of the dots, and a B5 A\/m v 0 is the effective Bohr radius of a single isolated harmonic well. This choice for the potential is motivated by the experimental fact5 that the spectrum of single dots in GaAs is well ...
1 - Hal-SHS
... distributions. (At this time they were given from experimental data. They would be calculable theoretically only with quantum field theory, shortly after the quantum mechanics formulation was obtained 18). The evidence for attributing radiation (defined by its frequency and wave length) both an ener ...
... distributions. (At this time they were given from experimental data. They would be calculable theoretically only with quantum field theory, shortly after the quantum mechanics formulation was obtained 18). The evidence for attributing radiation (defined by its frequency and wave length) both an ener ...
ppt - University of New Mexico
... inside information relative to a party Z is when Z assigns a pure state. Z is said to have a maximal belief structure. ...
... inside information relative to a party Z is when Z assigns a pure state. Z is said to have a maximal belief structure. ...
Toward a scalable, silicon-based quantum computing architecture
... be accomplished by iteratively amplifying the desired result, as for a dataset of size in Grover’s fast database search, [16]. Another option is to arrange the computation such that it does not matter which of many random results is measured from a qubit vector. This method is used in Shor’s algorit ...
... be accomplished by iteratively amplifying the desired result, as for a dataset of size in Grover’s fast database search, [16]. Another option is to arrange the computation such that it does not matter which of many random results is measured from a qubit vector. This method is used in Shor’s algorit ...
QUANTUM COMPUTING: AN OVERVIEW
... Quantum computing and quantum information processing are emerging disciplines in which the principles of quantum physics are employed to store and process information. We use the classical digital technology at almost every moment in our lives: computers, mobile phones, mp3 players, just to name a f ...
... Quantum computing and quantum information processing are emerging disciplines in which the principles of quantum physics are employed to store and process information. We use the classical digital technology at almost every moment in our lives: computers, mobile phones, mp3 players, just to name a f ...
Quantum-Secure Message Authentication Codes
... whereas allowing even a single additional query makes the problem easy. The rank method for proving quantum lower bounds overcomes these difficulties and is a general tool that can be used in other quantum security proofs. We note that Velema [Vel13] has since reproved Theorem 1.1 using a generaliz ...
... whereas allowing even a single additional query makes the problem easy. The rank method for proving quantum lower bounds overcomes these difficulties and is a general tool that can be used in other quantum security proofs. We note that Velema [Vel13] has since reproved Theorem 1.1 using a generaliz ...
Coherent population trapping of an electron spin in a single
... Another critical element for quantum information science is the initial quantum state preparation14 . Electron spin state initialization has recently been realized in a single quantum dot by optical spin cooling techniques with a high fidelity15,16 . However, the limitation is that only two possible ...
... Another critical element for quantum information science is the initial quantum state preparation14 . Electron spin state initialization has recently been realized in a single quantum dot by optical spin cooling techniques with a high fidelity15,16 . However, the limitation is that only two possible ...
Note
... In physics, the Elitzur–Vaidman bomb-testing problem is a thought experiment in quantum mechanics, first proposed by Avshalom Elitzur and Lev Vaidman in 1993.[1] An actual experiment demonstrating the solution was constructed and successfully tested by Anton Zeilinger, Paul Kwiat, Harald Weinfurter, ...
... In physics, the Elitzur–Vaidman bomb-testing problem is a thought experiment in quantum mechanics, first proposed by Avshalom Elitzur and Lev Vaidman in 1993.[1] An actual experiment demonstrating the solution was constructed and successfully tested by Anton Zeilinger, Paul Kwiat, Harald Weinfurter, ...
- Philsci
... foliation may be reducible to an account of pointlike bits of the world unfolding along their worldlines, but it need not be, and the structure of Minkowski spacetime does not require that it be so reducible. To give an account of the world unfolding in Minkowski space-time, it suffices that, given ...
... foliation may be reducible to an account of pointlike bits of the world unfolding along their worldlines, but it need not be, and the structure of Minkowski spacetime does not require that it be so reducible. To give an account of the world unfolding in Minkowski space-time, it suffices that, given ...
Weak antilocalization and spin relaxation in integrable quantum dots O Z
... are semiclassically approximated as a coherent sum over classical transmitted (backreflected) paths at fixed energy. A similar Ansatz has been used in Ref. [30]. The sum runs over classical trajectories γ ( n = ± n, m = ± m) that enter (exit) the cavity at “quantised” angles Θm ( Θ n ), measured fro ...
... are semiclassically approximated as a coherent sum over classical transmitted (backreflected) paths at fixed energy. A similar Ansatz has been used in Ref. [30]. The sum runs over classical trajectories γ ( n = ± n, m = ± m) that enter (exit) the cavity at “quantised” angles Θm ( Θ n ), measured fro ...
Axiomatic description of mixed states from Selinger`s CPM
... considering their preparation procedures as a special case of quantum channels. Since for each †-compact category Selinger’s construction provides another †-compact category, it doesn’t truly provide a profound structural grasp on quantum mixedness in the usual axiomatic sense. In this paper we obse ...
... considering their preparation procedures as a special case of quantum channels. Since for each †-compact category Selinger’s construction provides another †-compact category, it doesn’t truly provide a profound structural grasp on quantum mixedness in the usual axiomatic sense. In this paper we obse ...
Logical error rate in the Pauli twirling approximation Amara Katabarwa
... require a time exponential in the number of particles to simulate quantum phenomena, while his proposed simulator made from quantum components would avoid such a scaling. A surge of interest grew around the nascent field of quantum information theory when Shor discovered his now famous algorithm,2 w ...
... require a time exponential in the number of particles to simulate quantum phenomena, while his proposed simulator made from quantum components would avoid such a scaling. A surge of interest grew around the nascent field of quantum information theory when Shor discovered his now famous algorithm,2 w ...
A fully self-consistent treatment of collective
... liquids. This fact implies several additional advantages. First, because our theory is the direct analog of the approach used in the study of quantum spin glasses,27–29 interesting connections between quantum systems with and without quenched disorder may be made. For example, our recent study of th ...
... liquids. This fact implies several additional advantages. First, because our theory is the direct analog of the approach used in the study of quantum spin glasses,27–29 interesting connections between quantum systems with and without quenched disorder may be made. For example, our recent study of th ...
Black-Box Superconducting Circuit Quantization
... with uncontrolled (environmental) degrees of freedom must be minimized. In circuit quantum electrodynamics (cQED) [2,11,13], this is achieved by coupling the JJs to a common microwave environment with a desired discrete mode structure. So far such systems have mostly been described theoretically by ...
... with uncontrolled (environmental) degrees of freedom must be minimized. In circuit quantum electrodynamics (cQED) [2,11,13], this is achieved by coupling the JJs to a common microwave environment with a desired discrete mode structure. So far such systems have mostly been described theoretically by ...
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.