Realization of a single-Cooper-pair Josephson laser

Chen, Fei; Li, Juliang; Armour, A. D.; Brahimi, Erind; Stettenheim, Joel; Sirois, Adam; Simmonds, Raymond W.; Blencowe, M. P.; Rimberg, A. J.

doi:10.1103/physrevb.90.020506

Cited by 70 publications

(149 citation statements)

References 39 publications

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“…Recent experiments on such systems, using conductors such as Josephson junction (JJ) devices [1][2][3], or quantum dots [4,5], have demonstrated that coherent interactions between a conductor and a cavity can generate large non-equilibrium photon populations. Parallels can be drawn between cavity-conductor hybrids and quantum optical devices such as the micromaser in which a stream of excited atoms flows through an optical cavity [6,7]; in both cases the photons in the cavity act back on the photon generation process leading to strongly nonlinear dynamics and dissipative phase transitions.…”

Section: Introductionmentioning

confidence: 99%

Noise switching at a dynamical critical point in a cavity-conductor hybrid

2017

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.ukNoise switching at a dynamical critical point in a cavity-conductor hybrid Coupling a mesoscopic conductor to a microwave cavity can lead to fascinating feedback effects which generate strong correlations between the dynamics of photons and charges. We explore the connection between cavity dynamics and charge transport in a model system consisting of a voltagebiased Josephson junction embedded in a high-Q cavity, focussing on the behavior as the system is tuned through a dynamical critical point. On one side of the critical point the noise is strongly suppressed, signalling the existence of a novel regime of highly coherent transport, but on the other side it switches abruptly to a much larger value. Using a semiclassical approach we show that this behavior arises because of the strongly nonlinear cavity drive generated by the Cooper pairs. We also uncover an equivalence between charge and photonic current noise in the system which opens up a route to detecting the critical behavior through straightforward microwave measurements.

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Section: Introductionmentioning

confidence: 99%

Noise switching at a dynamical critical point in a cavity-conductor hybrid

2017

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“…Following this discussion, we are confident that the classical, nonlinear dynamics analyzed in this work is indeed accessible in realistic circuits similar to those in reference [29] and opens the door to study the interplay of driving, dissipation and resonances under well controlled conditions.…”

Section: Conclusion and Discussionmentioning

confidence: 87%

“…Such spectra have been recently investigated experimentally in Ref. [29]. Resonances [i.e., stable steady-state solutions of (4) or (8) quencies ω = 1/n, 2/n, 3/n, .…”

Section: Higher Order Resonancesmentioning

confidence: 99%

“…While quantum properties of the system, in particular of the emitted microwave radiation have been investigated widely, both theoretically [35][36][37][38][39][40][41][42][43][44][45] and within new experiments 46 , due to the complexity and richness of nonlinear effects a deeper understanding of the purely classical dynamics of the system is instructive, but also of relevance for current experimental activities 29 , as we will discuss below. This is especially the case, as the nonlinearity enters the system in a peculiar way.…”

Section: Introductionmentioning

confidence: 99%

“…A recent addition to the field of driven nonlinear JJs [24][25][26] are experiments on a dc-biased JJ connected to a resonator [27][28][29] . In this sort of setup, charge transfer through the JJ leads to excitations in the resonator, and therefore allows to convert energy carried by charge quanta into quantum microwave photons.…”

Section: Introductionmentioning

confidence: 99%

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Resonators coupled to voltage-biased Josephson junctions: From linear response to strongly driven nonlinear oscillations

et al. 2015

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Motivated by recent experiments, where a voltage biased Josephson junction is placed in series with a resonator, the classical dynamics of the circuit is studied in various domains of parameter space. This problem can be mapped onto the dissipative motion of a single degree of freedom in a nonlinear time-dependent potential, where in contrast to conventional settings the nonlinearity appears in the driving while the static potential is purely harmonic. For long times the system approaches steady states which are analyzed in the underdamped regime over the full range of driving parameters including the fundamental resonance as well as higher and sub-harmonics. Observables such as the dc-Josephson current and the radiated microwave power give direct information about the underlying dynamics covering phenomena as bifurcations, irregular motion, up-and down conversion. Due to their tunability, present and future set-ups provide versatile platforms to explore the changeover from linear response to strongly nonlinear behavior in driven dissipative systems under well defined conditions. I. INTRODUCTIONThe nonlinear properties of Josephson junctions (JJs) have made such devices a key circuit element for classical and quantum electronics. Accordingly, there has been a long tradition of studying non-linear phenomena in driven superconducting circuits, starting as early as the 1960s with the discovery of Shapiro steps 1 . While Shapiro-steps have remained a tool in exploring new directions in Josephson physics, for instance in atomic point contacts 2-6 , other nonlinear phenomena, like synchronization, have been investigated in arrays of JJs: as a test-bed for generic theory models to capture synchronization phenomena 7,8 , but as importantly with the prospect of applications as sources of more intense coherent radiation 9 , cf. also new developments using intrinsic arrays 10-12 .More recently, the nonlinearity of the JJ was exploited as the crucial factor in enabling the high sensitivity of Josephson bifurcation amplifiers, achieving substantial improvements towards reaching quantum-limited measurement processes [13][14][15][16] . Most of the features of Josephson bifurcation amplifiers, in fact, only rely on (and can consequently be described by) any type of nonlinearity 17-22 , e.g., Duffing-type models, so that only recently the full nonlinear potential of the JJ has become of interest in this field 23 .A recent addition to the field of driven nonlinear JJs 24-26 are experiments on a dc-biased JJ connected to a resonator 27-29 . In this sort of setup, charge transfer through the JJ leads to excitations in the resonator, and therefore allows to convert energy carried by charge quanta into quantum microwave photons. In these devices measurement of both the Josephson current and the emitted microwave radiation is possible, a distinct advantage in comparison to other recently proposed transport setups 30,31 , which show similar nonlinear features like bifurcations, period multiplication and up-and downconversion 32-34 . S...

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Time‐resolved statistics of photon pairs in two‐cavity Josephson photonics

Dambach

Kubala

Ankerhold

2016

Fortschritte der Physik

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We analyze the creation and emission of pairs of highly nonclassical microwave photons in a setup where a voltage‐biased Josephson junction is connected in series to two electromagnetic oscillators. Tuning the external voltage such that the Josephson frequency equals the sum of the two mode frequencies, each tunneling Cooper pair creates one additional photon in both of the two oscillators. The time‐resolved statistics of photon emission events from the two oscillators is investigated by means of single‐ and cross‐oscillator variants of the second‐order correlation function g(2)false(τfalse) and the waiting‐time distribution w(τ). They provide insight into the strongly correlated quantum dynamics of the two oscillator subsystems and reveal a rich variety of quantum features of light including strong antibunching and the presence of negative values in the Wigner function.

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Realization of a single-Cooper-pair Josephson laser

Abstract: MAIN BODY

Cited by 70 publications

References 39 publications

Noise switching at a dynamical critical point in a cavity-conductor hybrid

Noise switching at a dynamical critical point in a cavity-conductor hybrid

Resonators coupled to voltage-biased Josephson junctions: From linear response to strongly driven nonlinear oscillations

Time‐resolved statistics of photon pairs in two‐cavity Josephson photonics

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