Journal ArticleDOI
A one-way quantum computer.
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TLDR
A scheme of quantum computation that consists entirely of one-qubit measurements on a particular class of entangled states, the cluster states, which are thus one-way quantum computers and the measurements form the program.Abstract:
We present a scheme of quantum computation that consists entirely of one-qubit measurements on a particular class of entangled states, the cluster states. The measurements are used to imprint a quantum logic circuit on the state, thereby destroying its entanglement at the same time. Cluster states are thus one-way quantum computers and the measurements form the program.read more
Citations
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Enhancement of thermal entanglement in two-qubit XY models
TL;DR: In this paper, conditions leading to thermal entanglement enhancement in two-qubit XY models were analyzed and the effect of including cross-product terms, besides the standard XY exchange interactions, in the presence of an external magnetic field was investigated.
Journal ArticleDOI
Enhancement of thermal entanglement in two-qubit XY models
TL;DR: In this paper, conditions leading to enhancement of thermal entanglement in two-qubit XY models were analyzed and the effect of including cross-product terms, besides the standard XY exchange interactions, in the presence of an external magnetic field was investigated.
Journal ArticleDOI
Local reversibility and entanglement structure of many-body ground states
TL;DR: Local reversibility as mentioned in this paper characterizes the type of operations that are needed to reverse the action of a general disturbance on the state, and identifies new fundamental features of many-body ground states, which cannot be derived from the aforementioned properties.
Journal ArticleDOI
2D Multipartite Valence Bond States in Quantum Antiferromagnets
Enrique Rico,Hans J. Briegel +1 more
TL;DR: In this article, a quantum anti-ferromagnetic spin-1 model is characterised on a 2D lattice with the following requirements: i) the Hamiltonian is made out of nearest neighbor interactions.
Journal ArticleDOI
Preparing Multipartite Entangled Spin Qubits via Pauli Spin Blockade
TL;DR: A setup based on Pauli spin blockade for the preparation of large-scale W states of electrons in a double quantum dot (DQD) that can directly contribute to the advances in quantum technologies and, in particular in solid state systems is proposed.
References
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Journal ArticleDOI
Elementary gates for quantum computation.
Adriano Barenco,Charles H. Bennett,Richard Cleve,David P. DiVincenzo,Norman Margolus,Peter W. Shor,Tycho Sleator,John A. Smolin,Harald Weinfurter +8 more
TL;DR: U(2) gates are derived, which derive upper and lower bounds on the exact number of elementary gates required to build up a variety of two- and three-bit quantum gates, the asymptotic number required for n-bit Deutsch-Toffoli gates, and make some observations about the number of unitary operations on arbitrarily many bits.
Journal ArticleDOI
Quantum information and computation
TL;DR: In information processing, as in physics, the classical world view provides an incomplete approximation to an underlying quantum reality that can be harnessed to break codes, create unbreakable codes, and speed up otherwise intractable computations.
Journal ArticleDOI
Good quantum error-correcting codes exist
A. R. Calderbank,Peter W. Shor +1 more
TL;DR: The techniques investigated in this paper can be extended so as to reduce the accuracy required for factorization of numbers large enough to be difficult on conventional computers appears to be closer to one part in billions.
Journal ArticleDOI
Error Correcting Codes in Quantum Theory.
TL;DR: It is shown that a pair of states which are, in a certain sense, “macroscopically different,” can form a superposition in which the interference phase between the two parts is measurable, providing a highly stabilized “Schrodinger cat” state.
Journal ArticleDOI
Demonstrating the viability of universal quantum computation using teleportation and single-qubit operations
TL;DR: It is shown that single quantum bit operations, Bell-basis measurements and certain entangled quantum states such as Greenberger–Horne–Zeilinger (GHZ) states are sufficient to construct a universal quantum computer.