Seeing a single photon without destroying it
... measured in g or i. About 650 atom pairs are averaged per frequency step. The probabilities are reconstructed as a function of n, and the lines are obtained by numerical simulations. The triangles correspond to the probability of ®nding the probe in e when no measurement is performed on the meter. T ...
... measured in g or i. About 650 atom pairs are averaged per frequency step. The probabilities are reconstructed as a function of n, and the lines are obtained by numerical simulations. The triangles correspond to the probability of ®nding the probe in e when no measurement is performed on the meter. T ...
Embedding Quantum Simulators Roberto Di Candia
... the implementation of challenging Hamiltonians. The presented algorithms are general, and they may be implemented in several quantum platforms, e.g. photonics, trapped ions, circuit QED, among others. First, we propose a protocol which simulate the dynamics of an embedded Hamiltonian, allowing for t ...
... the implementation of challenging Hamiltonians. The presented algorithms are general, and they may be implemented in several quantum platforms, e.g. photonics, trapped ions, circuit QED, among others. First, we propose a protocol which simulate the dynamics of an embedded Hamiltonian, allowing for t ...
Bounding the quantum dimension with contextuality Linköping University Post Print
... implemented using photons [11,12]. In this situation, the dimension of the system can be interpreted as the dimension of the set of states the experimenter is able to prepare. As a third possibility, also the continuous time evolution can be used to bound the dimension of a quantum system [13]. In t ...
... implemented using photons [11,12]. In this situation, the dimension of the system can be interpreted as the dimension of the set of states the experimenter is able to prepare. As a third possibility, also the continuous time evolution can be used to bound the dimension of a quantum system [13]. In t ...
QBism, the Perimeter of Quantum Bayesianism
... that, really quick fixes. They look to be interpretive strategies hardly compelled by the particular details of the quantum formalism, giving only more or less arbitrary appendages to it. This already explains in part why we have been able to exhibit three such different strategies, but it is worse: ...
... that, really quick fixes. They look to be interpretive strategies hardly compelled by the particular details of the quantum formalism, giving only more or less arbitrary appendages to it. This already explains in part why we have been able to exhibit three such different strategies, but it is worse: ...
![arXiv:0905.2946v1 [cond-mat.str-el] 18 May 2009](http://s1.studyres.com/store/data/003310684_1-f6852d9094cc4ebe5853c88b867e67b0-300x300.png)
The stuff the world is made of: physics and reality
... perspective following from this human interaction. We can only observe the universe from the earth, and this gave us the perspective that the earth plays a central role. In an analogous way we can only observe the micro-world from our position in the macro-world; this forces us to extend the concept ...
... perspective following from this human interaction. We can only observe the universe from the earth, and this gave us the perspective that the earth plays a central role. In an analogous way we can only observe the micro-world from our position in the macro-world; this forces us to extend the concept ...
Gravitational Quantum States of Neutrons and the New GRANIT
... 14–19 February 20101; it was attended by over 50 participants from 12 countries. Ultracold neutrons (UCNs)9–11 are settled in gravitational quantum states12–14 if they are confined between a horizontal reflecting neutron mirror on bottom, and the Earth’s gravitational field on top. The energy of UCN ...
... 14–19 February 20101; it was attended by over 50 participants from 12 countries. Ultracold neutrons (UCNs)9–11 are settled in gravitational quantum states12–14 if they are confined between a horizontal reflecting neutron mirror on bottom, and the Earth’s gravitational field on top. The energy of UCN ...
Quantum critical temperature of a modulated oscillator Lingzhen Guo, Vittorio Peano, M. Marthaler,
... quantum electrodynamics, nanomechanics, and other areas [1]. This makes the oscillator advantageous for exploring quantum physics far from thermal equilibrium. Of fairly general interest in this respect are large rare quantum fluctuations that lead to switching between coexisting stable vibrational ...
... quantum electrodynamics, nanomechanics, and other areas [1]. This makes the oscillator advantageous for exploring quantum physics far from thermal equilibrium. Of fairly general interest in this respect are large rare quantum fluctuations that lead to switching between coexisting stable vibrational ...
PDF
... gate that operates on the momentum and polarization degrees of freedom of single photons [8]. It is well known that any arbitrary unitary operation can be generated using CNOT gates and single-qubit rotations, which can be used to manipulate qubits of single or entangled photons. In this letter we a ...
... gate that operates on the momentum and polarization degrees of freedom of single photons [8]. It is well known that any arbitrary unitary operation can be generated using CNOT gates and single-qubit rotations, which can be used to manipulate qubits of single or entangled photons. In this letter we a ...
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.