Results 21 to 30 of about 50 (50)
, 2006 In the lectures we will be concerned with some aspects of physical implementations of quantum gate operations which are necessary for quantum information processing. We will discuss two possible realizations. One of them is based on qubits being encoded in atomic degrees of freedom where the atoms are manipulated in optical lattices above atom chips ...
E. A. Hinds +3 more
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Efficient Quantum Computation with Probabilistic Quantum Gates [PDF]
Physical Review Letters, 2005 With a combination of the quantum repeater and the cluster state approaches, we show that efficient quantum computation can be constructed even if all the entangling quantum gates only succeed with an arbitrarily small probability $p$. The required computational overhead scales efficiently both with $1/p$ and $n$, where $n$ is the number of qubits in ...
Duan, L.-M., Kimble, H. J.
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Multibit Gates for Quantum Computing [PDF]
Physical Review Letters, 2001 We present a general technique to implement products of many qubit operators communicating via a joint harmonic oscillator degree of freedom in a quantum computer. By conditional displacements and rotations we can implement Hamiltonians which are trigonometric functions of qubit operators.
Wang, Xiaoguang +2 more
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An atomtronics transistor for quantum gates [PDF]
Physics Letters A, 2014 We present a mechanism for quantum gates where the qubits are encoded in the population distribution of two component ultracold atoms trapped in a species-selective triple-well potential. The gate operation is a specific application of a new design for an atomtronics transistor where inter-species interaction is used to control transport, and can be ...
Miroslav Gajdacz +2 more
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Randomized benchmarking of quantum gates [PDF]
Physical Review A, 2008 A key requirement for scalable quantum computing is that elementary quantum gates can be implemented with sufficiently low error. One method for determining the error behavior of a gate implementation is to perform process tomography. However, standard process tomography is limited by errors in state preparation, measurement and one-qubit gates.
R. Reichle +9 more
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Programmable Quantum Gate Arrays [PDF]
Physical Review Letters, 1997 3 pages, REVTEX. Submitted to Phys.
Isaac L. Chuang, Michael A. Nielsen
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On the stability of quantum holonomic gates
New Journal of Physics, 2012 7 ...
Maura Sassetti +6 more
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Input states for quantum gates [PDF]
Physical Review A, 2003 We examine three possible implementations of non-deterministic linear optical cnot gates with a view to an in-principle demonstration in the near future. To this end we consider demonstrating the gates using currently available sources such as spontaneous parametric down conversion and coherent states, and current detectors only able to distinguish ...
Gilchrist, A. +2 more
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Group theory for quantum gates and quantum coherence [PDF]
Journal of Physics A: Mathematical and Theoretical, 2008 Finite group extensions offer a natural language to quantum computing. In a nutshell, one roughly describes the action of a quantum computer as consisting of two finite groups of gates: error gates from the general Pauli group P and stabilizing gates within an extension group C.
Planat, Michel, Jorrand, Philippe
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The Quantum Cyclic Rotation Gate [PDF]
SN Computer ScienceAbstractA circular shift operator (or cyclic rotation gate) $${{\,\mathrm{\texttt {ROT}}\,}}_k$$ ROT k applies a rightward (or leftward) shift to an input register of n ...
A. Pavone, C. Viola
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