Scalable Quantum Computing with Josephson Charge Qubits

You, J. Q.; Tsai, Jaw-Shen; Nori, Franco

doi:10.1103/physrevlett.89.197902

Cited by 202 publications

(244 citation statements)

References 15 publications

Supporting

Mentioning

242

Contrasting

Unclassified

Order By: Relevance

“…All of the devices in the scheme are well within the current technology. It is the efficient scheme for the generation of the cluster states based on the Josephson charge qubit.Since the earliest Josephson charge qubit scheme [18] was proposed, a series of improved schemes [19,28] have been explored. Here, we concern the architecture of Josephson charge qubit in Ref.…”

mentioning

confidence: 99%

“…Here, we concern the architecture of Josephson charge qubit in Ref. [28], which is the first efficient scalable quantum computing (QC) architecture. The Josephson charge qubits structure is shown in Fig.(1).…”

mentioning

confidence: 99%

“…Since the earliest Josephson charge qubit scheme [18] was proposed, a series of improved schemes [19,28] have been explored. Here, we concern the architecture of Josephson charge qubit in Ref.…”

mentioning

confidence: 99%

“…2(a). In the spin-1 2 representation, based on charge states |0 = |n i and |1 = |n i+1 , the reduced Hamiltonian of the system becomes [28] …”

mentioning

confidence: 99%

“…In the case, the inductance L is only shared by the cooper-pair boxes i and j to form superconducting loops, as shown in Fig. 2(b), the Hamiltonian of the system can be reduced to [28,29] …”

mentioning

confidence: 99%

See 4 more Smart Citations

Generation of cluster states with Josephson charge qubits

Zheng¹,

Dong²,

Xue³

et al. 2007

Physics Letters A

View full text Add to dashboard Cite

A scheme for the generation of the cluster states based on the Josephson charge qubit is proposed. The twoqubit generating case is first introduced, and then generalized to multi-qubit case. The scheme is simple and easily manipulated, because any two charge qubits can be selectively and effectively coupled by a common inductance. More manipulations can be realized before decoherence sets in. All the devices in the scheme are well within the current technology.PACS numbers: 03.65. Ud, 85.25.Cp, 42.50.Dv Quantum entanglement plays one of the most important roles in the quantum information processing. Many ingenious applications of entanglement have been proposed, such as quantum dense coding [1], quantum teleportation [2], quantum cryptography [3], etc. In achieving the task of quantum communication, entangled states are used as a medium for transferring quantum information. Meanwhile, entangled states are also used for speeding up quantum computation. Therefore, the preparation of entangled states becomes a key step towards quantum computation. Though bipartite entanglement is well understood, the extensive researches of multipartite case are still difficultly proceeding. For a tripartiteentangled quantum system, there are two irreducible classes of entangled states [4]. Recently, Briegel and Raussendorf [5] introduced a new class of N-qubit entangled states, i.e., the cluster states, which have some special properties. In addition to the properties of both Greenberger-Horne-Zeilinger (GHZ) and W-class entangled states, they especially hold a large persistence of entanglement, that is, they (in the case of N > 4) are harder to be destroyed by local operations than GHZ-class states. It has been shown that a new Bell inequality is maximally violated by the four-qubit cluster states, and isn't violated by the four-qubit GHZ states [6]. More significantly, the cluster states are regarded as a resource of multiqubit entangled states, thus cluster states become an important resource in the physics, especially in quantum information.Recently, much attention has been attracted to the quantum computer, which works on the fundamental quantum mechanical principle. The quantum computers can solve some problems exponentially faster than the classical computers. For realizing quantum computing, some physical systems, such as nuclear magnetic resonance [7], trapped irons [8], cavity quantum electrodynamics (QED) [9], and optical systems [10] have been proposed. These systems have the advantage of high quantum coherence, but can't be integrated easily to form large-scale circuits. As is well known, the cluster states are mainly applied to quantum computing. In Ref.[11], Raussendorf and Briegel described the so-called oneway quantum computer, in which information is written onto the cluster and read out from the cluster by one-qubit measure- * Electronic address: xhzheng@ahu.edu.cn † Electronic address: zlcao@ahu.edu.cn (Corresponding Author) ments. A number of applications using cluster states in quantum computation have ...

show abstract

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…2(a). In the spin-1 2 representation, based on charge states |0 = |n i and |1 = |n i+1 , the reduced Hamiltonian of the system becomes [28] …”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Generation of cluster states with Josephson charge qubits

Zheng¹,

Dong²,

Xue³

et al. 2007

Physics Letters A

View full text Add to dashboard Cite

show abstract

Rapid State Transfer via All‐Microwave Scheme in Transmon Qutrit

Chen,

Ma,

et al. 2024

Physica Status Solidi (b)

View full text Add to dashboard Cite

As a crucial component of superconducting quantum computing, the three‐energy‐level quantum system, known as qutrit, along with qutrit gates, has garnered significant attention over the past decades, which highlights the significance of accomplishing state transfers between levels in multiqutrit systems as a critical task. Herein, the coupling is constructed via the all‐microwave approach. Both the coupling strength and Alternating Current stark shift are calibrated, based on which a fast (70 ns) state transfer from to is investigated and achieved through the stimulated Raman shortcut‐to‐adiabatic passage.

show abstract