Publisher's Note: Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation [Phys. Rev. A<b>69</b>, 062320 (2004)]

Blais, Alexandre; Huang, Ren-Shou; Wallraff, Andreas; Girvin, S. M.; Scheolkopf, R. J.

doi:10.1103/physreva.70.019901

Cited by 183 publications

(374 citation statements)

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“…Their work stimulated substantial theoretical [3][4][5][6][7][8][9] and experimental activities [10][11][12][13][14][15][16] devoted to the study of further quantum electrodynamic effects in electric circuits. In these "circuit QED" setups a superconducting qubit plays the role of an artificial atom, while the radiation field is replaced by the modes of an electric resonator.…”

Section: Introductionmentioning

confidence: 99%

Single-qubit lasing in the strong-coupling regime

et al. 2010

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Motivated by recent "circuit QED" experiments we study the lasing transition and spectral properties of single-qubit lasers. In the strong coupling, low-temperature regime quantum fluctuations dominate over thermal noise and strongly influence the linewidth of the laser. When the qubit and the resonator are detuned, amplitude and phase fluctuations of the radiation field are coupled, and the phase diffusion model, commonly used to describe conventional lasers, fails. We predict pronounced effects near the lasing transition, with an enhanced linewidth and non-exponential decay of the correlation functions. We cover a wide range of parameters by using two complementary approaches, one based on the Liouville equation in a Fock state basis, covering arbitrarily strong coupling but limited to low photon numbers, the other based on the coherent-state representation, covering large photon numbers but restricted to weak or intermediate coupling.

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Section: Introductionmentioning

confidence: 99%

Single-qubit lasing in the strong-coupling regime

et al. 2010

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“…These facts have proved cavity-QED to be a very useful platform for processing quantum information [1][2][3][4][5][6][7]. An alternative to the cavity-QED scenario is provided by its solid-state analog, termed as circuit-QED, where superconducting qubits are coupled to stripline resonators [8][9][10]. When compared to cavity-QED, the solid state platform has the advantages of strong coupling, a well-determined number of standing-still qubits, and more promises for scalability.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of interacting Dicke model in a coupled-cavity array

2014

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We consider the dynamics of an array of mutually interacting cavities, each containing an ensemble of N two-level atoms. By exploring the possibilities offered by ensembles of various dimensions and a range of atom-light and photon-hopping values, we investigate the generation of multi-site entanglement, as well as the performance of excitation transfer across the array resulting from the competition between on-site non-linearities of the matter-light interaction and inter-site photon hopping. In particular, for a three cavities interacting system it is observed that the initial excitation in the first cavity completely transfers to the ensemble in the third cavity through the hopping of photons between the adjacent cavities. Probabilities of the transfer of excitation of the cavity modes and ensembles exhibit characteristics of fast and slow oscillations governed by coupling and hopping parameters respectively. In the large hopping case, by seeding an initial excitation in the cavity at the center of the array, a tripartite W state, as well as a bipartite maximally entangled state is obtained, depending on the interaction time. Population of the ensemble in a cavity has a positive impact on the rate of excitation-transfer between the ensembles and their local cavity modes. In particular, for ensembles of 5 to 7 atoms, tripartite W states can be produced even when the hopping rate is comparable to the cavity-atom one. A similar behavior of the transfer of excitation is observed for a four coupled-cavity system with two initial excitations.

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“…By repeating the experiment for different t D s one can scan the whole phase space and thus fully reconstruct the quantum state. Table I displays a comparison between the parameters reported in [7] and the optimal parameters that we propose. The performance of the protocol for these two sets of parameters were tested by a numerical simulation, where each step of the protocol was carried out evolving the system with the exact JC-model plus the driving Hamiltonian.…”

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confidence: 99%

“…On the other hand, recent demonstrations of JaynesCummings-like dynamics between a CPB-qubit and the quantized mode of a superconducting transmission line resonator (which acts as a quasi-1D cavity) [2,7] have shown that many of the tools originally developed within the context of quantum optics can now be extended to solid state physics. Once coherent control and complete characterization of quantum states have been achieved at the qubit level, it is natural to attempt such levels of control for the electromagnetic field generated by the transmission line.…”

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confidence: 99%

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Direct measurement of the quantum state of the electromagnetic field in a superconducting transmission line

2006

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We propose an experimental procedure to directly measure the state of an electromagnetic field inside a resonator, corresponding to a superconducting transmission line, coupled to a Cooper-pair box (CPB). The measurement protocol is based on the use of a dispersive interaction between the field and the CPB, and the coupling to an external classical field that is tuned to resonance with either the field or the CPB. We present a numerical simulation that demonstrates the feasibility of this protocol, which is within reach of present technology

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Publisher's Note: Cavity quantum electrodynamics for superconducting electrical circuits: An architecture for quantum computation [Phys. Rev. A69, 062320 (2004)]

Cited by 183 publications

References 0 publications

Single-qubit lasing in the strong-coupling regime

Single-qubit lasing in the strong-coupling regime

Dynamics of interacting Dicke model in a coupled-cavity array

Direct measurement of the quantum state of the electromagnetic field in a superconducting transmission line

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