Controlled phase gate for solid-state charge-qubit architectures

Schirmer, S. G.; Oi, Daniel K. L.; Greentree, Andrew D.

doi:10.1103/physreva.71.012325

Cited by 11 publications

(11 citation statements)

References 34 publications

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“…Paper applied on the nuclear spin (see also [11]). This phase gate, whilst applied to the nuclear spin, is on the time scale of the electron spin rotation.…”

Section: Originalmentioning

confidence: 99%

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

Morton

Tyryshkin

Ardavan

et al. 2006

Physica Status Solidi (b)

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Nuclear spins have been proposed for the embodiment of quantum information and yielded the most complex demonstrations of quantum algorithms to date. However, the weak thermal polarisation of nuclear spins in experimentally accessible conditions has presented a barrier to further scaling. Here, we discuss the benefits of a coupled electron spin to the nuclear spin qubit and demonstrate the ideas using the 14 N nuclear spin in the N@C 60 molecule. In addition to providing a resource for nuclear spin polarisation and detection, the electron spin can be exploited to perform ultrafast nuclear spin phase gates, which can in turn be used to dynamically bang-bang decouple the nuclear spin from unwanted interactions.

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“…Paper applied on the nuclear spin (see also [11]). This phase gate, whilst applied to the nuclear spin, is on the time scale of the electron spin rotation.…”

Section: Originalmentioning

confidence: 99%

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

Morton

Tyryshkin

Ardavan

et al. 2006

Physica Status Solidi (b)

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“…and the quantum computing with a single molecular ensemble. On the other hand theses charged pairs have been used to realize a controlled phase gate [13]. All these applications have encouraged different authors to study the entangled properties of these systems.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Bloch vectors and channel capacity of two non-identical charge qubits

Metwally¹,

Abdel‐Aty²,

Obada³

2009

Physics Letters A

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We have considered a system of two superconducting charge qubits capacitively coupled to a microwave resonator. The dynamics of the Bloch vectors are investigated for different regimes. By means of the Bloch vectors and cross dyadic we quantify the degree of entanglement contained in the generated entangled state.We consider different values of the system parameters to discuss the dynamics of the channel capacity between the qubits. We show that there is an important role played by initial state settings, coupling constant and the mean photon number on generating entangled state with high degree of entanglement and high capacity

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“…[12][13][14][15][16] Depending on the topology, it has been possible to investigate the two stage Kondo and Dicke effects, and the properties derived from a non-Fermi-liquid behavior in a triangular configuration. 17 However, the interplay between the Kondo effect and the various exchange interactions among the spins was disregarded.…”

mentioning

confidence: 99%

Kondo regimes in a three-dots quantum gate

et al. 2010

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The transport properties of a linear structure of three quantum dots, with the central one connected to leads, are studied using the logarithmic discretization embedded cluster approximation. It is shown that the side dot spins can be ferromagnetically ͑F͒ or antiferromagnetically ͑AF͒ correlated between them, depending on the charge at the central dot. The system possesses a regime of coexistence of a two stage Kondo effect and the F phase. Ferromagnetism destroys the Kondo ground state when the system is driven to the molecular regime by increasing the interdot interaction above the largest Kondo temperature. Instead, an AF ground state does not compete with the Kondo regime. This remarkable behavior indicates that the measurement of the conductance can be an efficient readout procedure when the system operates as a quantum gate.

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Controlled phase gate for solid-state charge-qubit architectures

Cited by 11 publications

References 34 publications

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

Dynamics of Bloch vectors and channel capacity of two non-identical charge qubits

Kondo regimes in a three-dots quantum gate

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Controlled phase gate for solid-state charge-qubit architectures

Cited by 11 publications

References 34 publications

The N@C60 nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

The N@C60 nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

Dynamics of Bloch vectors and channel capacity of two non-identical charge qubits

Kondo regimes in a three-dots quantum gate

Contact Info

Product

Resources

About

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates

The N@C₆₀ nuclear spin qubit: Bang‐bang decoupling and ultrafast phase gates