### unknown title

"... Controlled-NOT logic gate for phase qubits based on conditional spectroscopy ..."

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Controlled-NOT logic gate for phase qubits based on conditional spectroscopy

### DOI 10.1007/s10751-007-9571-y Towards scaling up trapped ion quantum information processing

, 2007

"... Abstract Recent theoretical advances have identified several computational algorithms that can be implemented utilizing quantum information processing (QIP), which gives an exponential speedup over the corresponding (known) algorithms on conventional computers. QIP makes use of the counter-intuitive ..."

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Abstract Recent theoretical advances have identified several computational algorithms that can be implemented utilizing quantum information processing (QIP), which gives an exponential speedup over the corresponding (known) algorithms on conventional computers. QIP makes use of the counter-intuitive properties of quantum mechanics, such as entanglement and the superposition principle. Unfortunately it has so far been impossible to build a practical QIP system that outperforms conventional computers. Atomic ions confined in an array of interconnected traps represent a potentially scalable approach to QIP. All basic requirements have been experimentally demonstrated in one and two qubit experiments. The remaining task is to scale the system to many qubits while minimizing and correcting errors in the system. While this requires extremely challenging technological improvements, no fundamental roadblocks are currently foreseen.

### unknown title

"... Titel og evt. undertitel: Spin kvantebit enheder i GaAs, hen mod forbedring af kontrol og,kobling og udlæsning Title / Subtitle: Spin qubit devices in GaAs: towards improving operation coupling and sensing Subject description: Fabrication of spin qubit devices on GaAs heterostructures, ..."

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Titel og evt. undertitel: Spin kvantebit enheder i GaAs, hen mod forbedring af kontrol og,kobling og udlæsning Title / Subtitle: Spin qubit devices in GaAs: towards improving operation coupling and sensing Subject description: Fabrication of spin qubit devices on GaAs heterostructures,

### Contents

, 2009

"... Rydberg atoms with principal quantum number n ≫ 1 have exaggerated atomic properties including dipole-dipole interactions that scale as n 4 and radiative lifetimes that scale as n 3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qu ..."

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Rydberg atoms with principal quantum number n ≫ 1 have exaggerated atomic properties including dipole-dipole interactions that scale as n 4 and radiative lifetimes that scale as n 3. It was proposed a decade ago to take advantage of these properties to implement quantum gates between neutral atom qubits. The availability of a strong, long-range interaction that can be coherently

### Quantum Computing Classical Physics

, 2001

"... In the past decade quantum algorithms have been found which outperform the best classical solutions known for certain classical problems as well as the best classical methods known for simulation of certain quantum systems. This suggests that they may also speed up the simulation of some classical s ..."

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In the past decade quantum algorithms have been found which outperform the best classical solutions known for certain classical problems as well as the best classical methods known for simulation of certain quantum systems. This suggests that they may also speed up the simulation of some classical systems. I describe one class of discrete quantum algorithms which do so—quantum lattice gas automata—and show how to implement them efficiently on standard quantum computers.

### Delocalized Qubits as a Computational Basis in the System of Interacting Spins

, 2008

"... It is suggested to map the qubits into solid state NMR spin system collective states instead of the states of the individual spin. Such an approach introduces the stable computational basis without any additional actions and allows to obtain the universal set of quantum gates, which operation time i ..."

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It is suggested to map the qubits into solid state NMR spin system collective states instead of the states of the individual spin. Such an approach introduces the stable computational basis without any additional actions and allows to obtain the universal set of quantum gates, which operation time is determined only by a RF pulse duration. PACS No.: 03.65.-w, 03.67.-a, 76.60.-k. 1

### Logical

, 2000

"... We describe a solid state implementation of a quantum computer using ballistic single electrons as flying qubits in 1D nanowires. We show how to implement all the steps required for universal quantum computation: preparation of the initial state, measurement of the final state and a universal set of ..."

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We describe a solid state implementation of a quantum computer using ballistic single electrons as flying qubits in 1D nanowires. We show how to implement all the steps required for universal quantum computation: preparation of the initial state, measurement of the final state and a universal set of quantum gates. An important advantage of this model is the fact that we do not need ultrafast optoelectronics for gate operations. We use cold programming (or pre-programming), i.e., the gates are set before launching the electrons; all programming can be done using static electric fields only.

### Photon Statistics of a Non-Stationary Periodically Driven Single-Photon Source

, 2004

"... Abstract. We investigate the photon statistics of a single-photon source that operates under non-stationary conditions. The photons are emitted by shining a periodic sequence of laser pulses on single atoms falling randomly through a high-finesse optical cavity. Strong antibunching is found in the i ..."

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Abstract. We investigate the photon statistics of a single-photon source that operates under non-stationary conditions. The photons are emitted by shining a periodic sequence of laser pulses on single atoms falling randomly through a high-finesse optical cavity. Strong antibunching is found in the intensity correlation of the emitted light, demonstrating that a