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Search Results: 1 - 10 of 951 matches for " Eran Arbel-Segev "
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Signal Amplification in NbN Superconducting Resonators via Stochastic Resonance
Baleegh Abdo,Eran Arbel-Segev,Oleg Shtempluck,Eyal Buks
Physics , 2006, DOI: 10.1016/j.physleta.2007.05.103
Abstract: We exploit nonlinearity in NbN superconducting stripline resonators, which is originated by local thermal instability, for studying stochastic resonance. As the resonators are driven into instability, small amplitude modulated (AM) microwave signals are amplified with the aid of injected white noise. The dependence of the signal amplification on the modulation amplitude and the modulation frequency is examined and compared with theory.
Extreme Nonlinear Phenomena in NbN Superconducting Stripline Resonators
Eran Arbel-Segev,Baleegh Abdo,Oleg Shtempluck,Eyal Buks
Physics , 2006,
Abstract: We study a microwave superconducting stripline resonator made of NbN on a Sapphire wafer. Novel, self-sustained modulation of the reflected power off the resonator, at frequencies of up to 60MHz, has been recently reported. Here we show experimentally that near the self modulation threshold, the device exhibits a giant nonlinearity, which manifests itself in an extremely high intermodulation gain, accompanied by a very strong noise squeezing and period doubling of various orders. Such a device is highly suitable for serving as a readout device in quantum data processing systems.
Thermal Instability and Self-Sustained Modulation in Superconducting NbN Stripline Resonators
Eran Arbel-Segev,Baleegh Abdo,Oleg Shtempluck,Eyal Buks
Physics , 2006,
Abstract: We study theoretically and experimentally the response of a microwave superconducting stripline resonator, integrated with a microbridge, to a monochromatic injected signal. We find that there is a certain range of driving parameters, in which a novel nonlinear phenomenon immerges, and self-sustained modulation of the reflected power off the resonator is generated by the resonator. A theoretical model which attributes the self modulation to a thermal instability yields a good agreement with the experimental results.
Escape rate of metastable states in a driven NbN superconducting microwave resonator
Baleegh Abdo,Eran Arbel-Segev,Oleg Shtempluck,Eyal Buks
Physics , 2006, DOI: 10.1063/1.2722241
Abstract: We study thermal instability and formation of local hot spots in a driven nonlinear NbN superconducting microwave resonator. White noise injected into the resonator results in transitions between the metastable states via a process consisting of two stages. In the first stage, the input noise entering the system induces fluctuations in the resonator mode. While, in the second one, these mode fluctuations result in phase transitions of the hot spot due to induced temperature fluctuations. The associated noise-activated escape rate is calculated theoretically, and also measured experimentally by means of driving the system into stochastic resonance. A comparison between theory and experiment yields a partial agreement.
Prospects of employing superconducting stripline resonators for studying the dynamical Casimir effect experimentally
Eran Arbel-Segev,Baleegh Abdo,Oleg Shtempluck,Eyal Buks,Bernard Yurke
Physics , 2006,
Abstract: We discuss the prospects of employing an NbN superconducting microwave stripline resonator for studying the dynamical Casimir effect experimentally. Preliminary experimental results, in which optical illumination is employed for modulating the resonance frequencies of the resonator, show that such a system is highly promising for this purpose. Moreover, we discuss the undesirable effect of heating which results from the optical illumination, and show that degradation in noise properties can be minimized by employing an appropriate design.
Quantum Nondemolition Measurement of Discrete Fock States of a Nanomechanical Resonator
Eyal Buks,Eran Arbel-Segev,Stav Zaitsev,Baleegh Abdo,M. P. Blencowe
Physics , 2006,
Abstract: We study theoretically a radio frequency superconducting interference device integrated with both a nanomechanical resonator and an LC one. By applying adiabatic and rotating wave approximations, we obtain an effective Hamiltonian that governs the dynamics of the mechanical and LC resonators. Nonlinear terms in this Hamiltonian can be exploited for performing a quantum nondemolition measurement of Fock states of the nanomechanical resonator. We address the feasibility of experimental implementation and show that the nonlinear coupling can be made sufficiently strong to allow the detection of discrete mechanical Fock states.
Self-oscillations in a superconducting stripline resonator integrated with a DC-SQUID
Eran Segev,Oren Suchoi,Oleg Shtempluck,Eyal Buks
Physics , 2009,
Abstract: We study self-sustained oscillations (SO) in a Nb superconducting stripline resonators (SSR) integrated with a DC superconducting quantum interface devices (SQUID). We find that both the power threshold where these oscillations start and the oscillations frequency are periodic in the applied magnetic flux threading the SQUID loop. A theoretical model which attributes the SO to a thermal instability in the DC-SQUID yields a good agreement with the experimental results. This flux dependant nonlinearity may be used for quantum state reading of a qubit-SSR integrated device.
Stochastic Resonance with a Single Metastable State
Eran Segev,Baleegh Abdo,Oleg Shtempluck,Eyal Buks
Physics , 2007, DOI: 10.1103/PhysRevB.77.012501
Abstract: We study thermal instability in NbN superconducting stripline resonators. The system exhibits extreme nonlinearity near a bifurcation, which separates a monostable zone and an astable one. The lifetime of the metastable state, which is locally stable in the monostable zone, is measure near the bifurcation and the results are compared with a theory. Near bifurcation, where the lifetime becomes relatively short, the system exhibits strong amplification of a weak input modulation signal. We find that the frequency bandwidth of this amplification mechanism is limited by the rate of thermal relaxation. When the frequency of the input modulation signal becomes comparable or larger than this rate the response of the system exhibits sub-harmonics of various orders.
Unexpected Nonlinear Dynamics in NbN Superconducting Microwave Resonators
Baleegh Abdo,Eran Segev,Oleg Shtempluck,Eyal Buks
Physics , 2005, DOI: 10.1103/PhysRevB.73.134513
Abstract: In this work we characterize the unusual nonlinear dynamics of the resonance response, exhibited by our NbN superconducting microwave resonators, using different operating conditions. The nonlinear dynamics, occurring at relatively low input powers (2-4 orders of magnitude lower than Nb), and which include among others, bifurcations in the resonance curve, hysteresis loops and resonance frequency shift, are measured herein using varying temperature, applied magnetic field, white noise and rapid frequency sweeps. Based on these measurement results, we consider a hypothesis according to which Josephson junctions forming weak links at the boundaries of the NbN grains are responsible for the observed behavior, and we show that most of the experimental results are qualitatively consistent with such hypothesis.
Novel Self-Sustained Modulation in Superconducting Stripline Resonators
Eran Segev,Baleegh Abdo,Oleg Shtempluck,Eyal Buks
Physics , 2006, DOI: 10.1209/0295-5075/78/57002
Abstract: We study thermal instability in a driven superconducting NbN resonator integrated with a microbridge. A monochromatic input drive is injected into the resonator and the response is measured as a function of the frequency and amplitude of the drive. Inside a certain zone in the frequency-amplitude plane the system has no steady state, and consequently self-sustained modulation of the reflected power off the resonator is generated. A theoretical model, according to which the instability originates by a hot spot forming in the microbridge, exhibits a good quantitative agreement with the experimental results.
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