1,721,007 research outputs found
Dissipative effects on a scheme of generation of a W state in an array of coupled Josephson junctions
No full textThe dynamics of an open quantum system, consisting of three superconducting qubits
interacting with independent reservoirs, is investigated to elucidate the effects of the
environment on a unitary generation scheme of W states (Migliore R et al 2006 Phys. Rev. B
74 104503). To this end a microscopic master equation is constructed and its exact resolution
predicts the generation of a Werner-like state instead of the W state. A comparison between
our model and a more intuitive phenomenological model is also considered, in order to find the
limits of the latter approach in the case of structured reservoirs
Freezing the dynamics of a rf SQUID qubit via its strong-coupling to a quantized microwave field
No full textIn this paper we show the results concerning the study of the dynamics of a rf SQUID qubit exposed to a quantized monochromatic microwave source in the strong coupling limit. We bring out more details of the possibility both of controlling and hindering the oscillations between the two qubit flux states when we consider opportunely prepared initial field states. The importance of conceiving of such kinds of theoretical schemes in view of possible applications in the context of quantum computing is briefly discussed
Generation of entangled states of two distant cavity modes via Josephson junction based devices
No full textWe present a simple scheme for the preparation of entangled states of the e.m. modes of
two spatially separated microwave cavities exploiting their interaction with two superconducting
SQUID rings embedded within them. The scheme requires that the two
SQUID qubits are initially prepared in an entangled state and the possibility of controlling
both the coupling strengths and the interaction times. We also briefly discuss the
importance of such a theoretical scheme in view of possible applications in the context
of quantum computing and its experimental feasibility
Controlling the dynamics of a flux qubit strongly coupled to a quantized electromagnetic field
No full textEntangling two uncoupled flux qubits via their sequential interaction with a quantized electromagnetic field
No full text
Dissipation and entanglement dynamics for two interacting qubits coupled to independent reservoirs
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Single and two-qubit dynamics in circuit QED architectures
No full textIn this paper we overview our researches on the generation and the
control of entangled states in the framework of circuit quantum
electrodynamics. Applications in the context of quantum computing
and quantum information theory are discussed
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