Intermode dephasing in a superconducting stripline resonator

Suchoi, Oren; Abdo, Baleegh; Segev, Eran; Shtempluck, Oleg; Blencowe, M. P.; Buks, Eyal

doi:10.1103/physrevb.81.174525

Cited by 15 publications

(21 citation statements)

References 49 publications

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“…MHz, which has already exceeded the observed Kerr strength obtained by exploiting a large Josephson junction connected with the TLR in the recent papers [44][45][46].…”

Section: Coupling Between the Tlrs And The Moleculementioning

confidence: 76%

Cross-Kerr-effect induced by coupled Josephson qubits in circuit quantum electrodynamics

Chen

et al. 2011

Phys. Rev. A

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We propose a scheme for implementing cross Kerr nonlinearity between two superconducting transmission line resonators (TLR) via their interaction with a coupler which is constructed by two superconducting charge qubits connected to each other via a superconducting quantum interference device. When suitably driven, the coupler can induce very strong cross phase modulation (XPM) between the two TLRs due to its N-type level structure and the consequent electromagnetically induced transparency in its lowest states. The flexibility of our design can lead to various inter-TLR coupling configurations. The obtained cross Kerr coefficient is large enough to allow many important quantum operations in which only few photons are involved. We further show that this scheme is very robust against the fluctuations in solid state circuits. Our numerical calculations imply that the absorption and dispersion resulted from the decoherence of the coupler are very small compared with the strength of the proposed XPM.

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“…MHz, which has already exceeded the observed Kerr strength obtained by exploiting a large Josephson junction connected with the TLR in the recent papers [44][45][46].…”

Section: Coupling Between the Tlrs And The Moleculementioning

confidence: 76%

Cross-Kerr-effect induced by coupled Josephson qubits in circuit quantum electrodynamics

Chen

et al. 2011

Phys. Rev. A

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“…We introduce a novel method for achieving strong and tunable optomechanical coupling, which is based on positioning a metallically coated optical fiber near the mechanical resonator. The microwave cavity, which is made of a superconducting aluminum microstrip, exhibits Kerr type nonlinearity [11,22,74,85], which significantly affects the dynamics of the entire op-tomechanical system [56]. We study the dependence of the self-excited oscillations on the driving parameters of the cavity and found that a good agreement with theory can be obtained provided that cavity nonlinearity is taken into account [56].…”

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confidence: 99%

Intermittency in an optomechanical cavity near a subcritical Hopf bifurcation

et al. 2014

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We experimentally study an optomechanical cavity consisting of an oscillating mechanical resonator embedded in a superconducting microwave transmission line cavity. Tunable optomechanical coupling between the mechanical resonator and the microwave cavity is introduced by positioning a niobium-coated single mode optical fiber above the mechanical resonator. The capacitance between the mechanical resonator and the coated fiber gives rise to optomechanical coupling, which can be controlled by varying the fiber-resonator distance. We study radiation pressure induced self-excited oscillations as a function of microwave driving parameters (frequency and power). Intermittency between limit cycle and steady state behaviors is observed with blue-detuned driving frequency. The experimental results are accounted for by a model that takes into account the Duffing-like nonlinearity of the microwave cavity. A stability analysis reveals a subcritical Hopf bifurcation near the region where intermittency is observed.

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“…On the other hand, many theories and experiments involved cross-Kerr effect have been discussed in circuit QED [48][49][50][51][52][53][54][55][56][57]. Experimentally, based on the cross-Kerr nonlinearity, the observation of quantum state collapse and revival [52], the investigation of the feasibility of microwave photon counting [53], and the realization of the giant cross-Kerr effect for propagating microwaves [54] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Circuit QED: cross-Kerr effect induced by a superconducting qutrit without classical pulses

Liu

Zhang

Guo

et al. 2017

Quantum Inf Process

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The realization of cross-Kerr nonlinearity is an important task for many applications in quantum information processing. In this work, we propose a method for realizing cross-Kerr nonlinearity interaction between two superconducting coplanar waveguide resonators coupled by a three-level superconducting flux qutrit (coupler). By employing the qutrit-resonator dispersive interaction, we derive an effective Hamiltonian involving two-photon number operators and a coupler operator. This Hamiltonian can be used to describe a cross-Kerr nonlinearity interaction between two resonators when the coupler is in the ground state. Because the coupler is unexcited during the entire process, the effect of coupler decoherence can be greatly minimized. More importantly, compared with the previous proposals, our proposal does not require classical pulses. Furthermore, due to use of only a three-level qutrit, the experimental setup is much simplified when compared with previous proposals requiring a four-level artificial atomic systems. Based on our Hamiltonian, we implement a two-resonator qubits controlled-phase gate and generate a two-resonator entangled coherent state. Numerical simulation shows that the high-fidelity implementation of the phase gate and creation of the entangled coherent state are feasible with current circuit QED technology.

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Intermode dephasing in a superconducting stripline resonator

Cited by 15 publications

References 49 publications

Cross-Kerr-effect induced by coupled Josephson qubits in circuit quantum electrodynamics

Cross-Kerr-effect induced by coupled Josephson qubits in circuit quantum electrodynamics

Intermittency in an optomechanical cavity near a subcritical Hopf bifurcation

Circuit QED: cross-Kerr effect induced by a superconducting qutrit without classical pulses

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