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Total: 80 results found.

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1. Non-locality of non-Abelian anyons
(Uncategorized/Publication)
... does not depend on the distance between two particles, but rather on their exchange history. The information encoded in anyons is inherently non-local even in the single subsystem level making the treatment ...
2. Quantum tetrahedron and its classical limit
(Uncategorized/Publication)
Classical information that is retrieved from a quantum tetrahedron is intrinsically fuzzy. We present an asymptotically optimal generalized measurement for its extraction. For a single tetrahedron the ...
... circuits. Here, we present and demonstrate a general technique that harnesses multi-level information carriers to significantly reduce this number, enabling the construction of key quantum circuits with ...
Many proposals for quantum information processing are subject to detectable loss errors. In this Letter, we show that topological error correcting codes, which protect against computational errors, are ...
... of experimental parameters. Thanks to these properties the scheme is a promising candidate for transport of quantum information in quantum computing. We study the effects of spatially registered noise ...
We analyze decoherence-free (DF) quantum information in the presence of an arbitrary non-nearest-neighbor bath-induced system Hamiltonian using a Markovian master equation. We show that the most appropriate ...
Many promising schemes for quantum information processing (QIP) rely on few-photon interference effects. In these proposals, the photons are treated as being indistinguishable particles. However, single ...
8. Manipulating biphotonic qutrits
(Uncategorized/Publication)
Quantum information carriers with higher dimension than the canonical qubit offer significant advantages. However, manipulating such systems is extremely difficult. We show how measurement-induced nonlinearities ...
... on demand, so as to keep teleporting only logical information into a gap-protected ground state of the residual chains after the interactions with spins to be measured are turned off. We describe implementations ...
10. Quantum Cayley networks of the hypercube
(Uncategorized/Publication)
We develop the work of Christandl [Phys. Rev. A 71, 032312 (2005)], to show how a d-hypercube homogenous network can be dressed by additional links to perfectly route quantum information between any given ...
We use techniques of quantum information theory to analyze the quantum causal histories approach to quantum gravity. While it is consistent to introduce closed timelike curves (CTCs), they cannot generically ...
12. Quantum control of a single qubit
(Uncategorized/Publication)
... with an optimum measurement strength which achieves the best trade-off between gaining information about the system and disturbing it through measurement backaction. We study the performance of a quantum ...
... between the qubit eigenstates, which have a profound effect on the detector output current. Useful information about the qubit dynamics, such as dephasing and relaxation rates, and the Rabi frequency, ...
It is shown that complete information on the micromaser cavity field correlation function and hence the spectrum for the cavity field at absolute zero is encoded on the atomic beam exiting from the cavity. ...
We study multiplicative character sums taken on the values of a non-homogeneous Beatty sequence B-alpha,B-beta = \, where alpha,beta is an element of R, and alpha is irrational. In particular, our bounds ...
17. Quantum-information processing via a lossy bus
(Uncategorized/Publication)
We describe a method to perform two-qubit measurements and logic operations on pairs of qubits which each interact with a harmonic oscillator degree of freedom (the bus), but do not directly interact with ...
18. Short character sums with Beatty sequences
(Uncategorized/Publication)
We estimate multiplicative character sums taken on the values of a non-homogeneous Beatty sequence \, where alpha, beta is an element of R, and alpha is irrational. In particular, our bounds imply that ...
The ideas behind Quantum Information Processing (QIP) began to appear about twenty years ago and theoretical developments have been appearing ever since. Over the last decade quantum experiments have begun ...
Scalability of a quantum computation requires that the information be processed on multiple subsystems. However, it is unclear how the complexity of a quantum algorithm, quantified by the number of entangling ...
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