Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 1/f noise: implications for solid-state quantum information   The efficiency of the future devices for quantum information processing will
be limited mostly by the finite decoherence rates of the individual qubits and
quantum gates. Recently, substantial progress was achieved in enhancing the
time within which a solid-state qubit demonstrates coherent dynamics. This
progress is based mostly on a successful isolation of the qubits from external
decoherence sources obtained by clever engineering. Under these conditions, the
material-inherent sources of noise start to play a crucial role. In most cases,
quantum devices are affected by noise decreasing with frequency, f,
approximately as 1/f. According to the present point of view, such noise is due
to material- and device-specific microscopic degrees of freedom interacting
with quantum variables of the nanodevice. The simplest picture is that the
environment that destroys the phase coherence of the device can be thought of
as a system of two-state fluctuators, which experience random hops between
their states. If the hopping times are distributed in a exponentially broad
domain, the resulting fluctuations have a spectrum close to 1/f in a large
frequency range. In this paper we review the current state of the theory of
decoherence due to degrees of freedom producing 1/f noise. We discuss basic
mechanisms of such noises in various nanodevices and then review several models
describing the interaction of the noise sources with quantum devices. The main
focus of the review is to analyze how the 1/f noise destroys their coherent
operation. We start from individual qubits concentrating mostly on the devices
based on superconductor circuits, and then discuss some special issues related
to more complicated architectures. Finally, we consider several strategies for
minimizing the noise-induced decoherence.

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The categories of this paper are: cs
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The categories of this paper are: math-ph
18
The categories of this paper are: econ
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th