An Extreme form of Superactivation for Quantum Zero-Error
... communications, yet can still create correlations. In Ref. [4] it was shown that there are pairs of channels with very different noise characteristics, but both with zero quantum capacity, that, when used together, have a large joint quantum capacity. This superactivation is completely different fro ...
... communications, yet can still create correlations. In Ref. [4] it was shown that there are pairs of channels with very different noise characteristics, but both with zero quantum capacity, that, when used together, have a large joint quantum capacity. This superactivation is completely different fro ...
Nonparametric estimation of the purity of a quantum state in
... Quantum mechanics is a fundamental branch of theoretical physics, in the sense that it provides accurate and precise descriptions for many phenomena on the atomic and subatomic level. In the formalism of quantum mechanics, the state of a system at a given time is described by a complex wave function ...
... Quantum mechanics is a fundamental branch of theoretical physics, in the sense that it provides accurate and precise descriptions for many phenomena on the atomic and subatomic level. In the formalism of quantum mechanics, the state of a system at a given time is described by a complex wave function ...
Quantum Computation - University of Denver
... algorithm is quadratically faster than any possible search algorithm for a classical computer, and Shor’s quantum factorization algorithm is exponentially faster than any known classical counterpart. These experimental and theoretical results indicate that quantum computers are feasible and will be ...
... algorithm is quadratically faster than any possible search algorithm for a classical computer, and Shor’s quantum factorization algorithm is exponentially faster than any known classical counterpart. These experimental and theoretical results indicate that quantum computers are feasible and will be ...
Cryptographic distinguishability measures for quantum
... measure can be quite different. However, with the newly derived inequalities in hand, it is an easy matter to show that exponential indistinguishability with respect to one measure implies exponential indistinguishability with respect to each of the other four measures. In other words, these four no ...
... measure can be quite different. However, with the newly derived inequalities in hand, it is an easy matter to show that exponential indistinguishability with respect to one measure implies exponential indistinguishability with respect to each of the other four measures. In other words, these four no ...
Boson sampling for molecular vibronic spectra - CIQM
... Recently, Aaronson and Arkhipov found that sampling the distribution of photons at the output of a linear photonic network is expected (modulo a few conjectures) to be computationally inefficient for any classical computer, because it requires the evaluation of many matrix permanents12. On the contra ...
... Recently, Aaronson and Arkhipov found that sampling the distribution of photons at the output of a linear photonic network is expected (modulo a few conjectures) to be computationally inefficient for any classical computer, because it requires the evaluation of many matrix permanents12. On the contra ...
The permutation gates combined with the one
... At the most basic level of quantum mechanics one must respect the uncertainty principle, and hence the classical control theory cannot be naively extended without modification [27]. Given appropriate experimental testing grounds, it should become feasible to develop a technically useful quantum cont ...
... At the most basic level of quantum mechanics one must respect the uncertainty principle, and hence the classical control theory cannot be naively extended without modification [27]. Given appropriate experimental testing grounds, it should become feasible to develop a technically useful quantum cont ...
Creation of entangled states in coupled quantum dots via adiabatic... C. Creatore, R. T. Brierley, R. T. Phillips,
... ARP, then, allows a pulse to be constructed that transfers these pairs into their entangled excited states, without exciting the others. Thus, as shown in Fig. 3, the entanglement of formation per excitation could be very close to one, even within a strongly disordered ensemble. Our approach represe ...
... ARP, then, allows a pulse to be constructed that transfers these pairs into their entangled excited states, without exciting the others. Thus, as shown in Fig. 3, the entanglement of formation per excitation could be very close to one, even within a strongly disordered ensemble. Our approach represe ...
Slides
... We trust quantum over classical coin tossing because one can never rule out an insider attack on classical coin tossing, whereas an insider attack on a quantum coin toss based on a pure state is inconsistent with the beliefs that led to the pure-state assignment. ...
... We trust quantum over classical coin tossing because one can never rule out an insider attack on classical coin tossing, whereas an insider attack on a quantum coin toss based on a pure state is inconsistent with the beliefs that led to the pure-state assignment. ...
Visualizing the Coupling between Red and Blue Stark States
... possibility to observe the nodal structure of quasibound Stark states was recently validated in experiments on hydrogen [13,20] and lithium [14]. Here, we exploit this capability to directly visualize changes in the Stark wave function when interference narrowing occurs. Photoionization microscopy e ...
... possibility to observe the nodal structure of quasibound Stark states was recently validated in experiments on hydrogen [13,20] and lithium [14]. Here, we exploit this capability to directly visualize changes in the Stark wave function when interference narrowing occurs. Photoionization microscopy e ...
Entanglement of Gaussian states using a beam splitter
... generated in laboratory, e.g., the two output beams of a nonlinear optical device 共parametric down converter兲 关1兴. Alternatively, a beam splitter, one of the linear optical devices, can also be used to generate quantum entanglement between two modes 关8兴. There have been many studies for producing en ...
... generated in laboratory, e.g., the two output beams of a nonlinear optical device 共parametric down converter兲 关1兴. Alternatively, a beam splitter, one of the linear optical devices, can also be used to generate quantum entanglement between two modes 关8兴. There have been many studies for producing en ...
Quantum Random Walk via Classical Random Walk With Internal
... to some probabilistic rule is studied. In the simplest model, a particle will move, at every discrete time step, one unit to the left or to the right with probabilities p and 1 − p, respectively, independent of its past positions. Many useful questions can be asked about the dynamics of the particle ...
... to some probabilistic rule is studied. In the simplest model, a particle will move, at every discrete time step, one unit to the left or to the right with probabilities p and 1 − p, respectively, independent of its past positions. Many useful questions can be asked about the dynamics of the particle ...
The Power of Quantum Advice
... Idea: Take some advice resource (such as a coin or a quantum state), and simulate it using a short classical string, together with a polynomial number of untrusted advice resources. In other words, all the relevant information in the advice resource gets packed into an ordinary string (which we say ...
... Idea: Take some advice resource (such as a coin or a quantum state), and simulate it using a short classical string, together with a polynomial number of untrusted advice resources. In other words, all the relevant information in the advice resource gets packed into an ordinary string (which we say ...
atom interferometer - Center for Ultracold Atoms
... separation of several hundred microns between the two interfering paths, will require gratings that are physically larger and of significantly smaller period than those available in the past. We have therefore initiated a collaboration with the group of Prof. Hank Smith at the MIT Nanostructures Lab ...
... separation of several hundred microns between the two interfering paths, will require gratings that are physically larger and of significantly smaller period than those available in the past. We have therefore initiated a collaboration with the group of Prof. Hank Smith at the MIT Nanostructures Lab ...
- Harish-Chandra Research Institute
... Until recently we had been looking for qubit systems, in which all qubits are coupled to each other with unequal couplings, so that all transitions are resolved and we have a complete access to the full Hilbert space. ...
... Until recently we had been looking for qubit systems, in which all qubits are coupled to each other with unequal couplings, so that all transitions are resolved and we have a complete access to the full Hilbert space. ...
