A low-noise series-array Josephson junction parametric amplifier

Yurke, Bernard; Roukes, M. L.; Movshovich, R.; Pargellis, A. N.

doi:10.1063/1.116845

Cited by 56 publications

(66 citation statements)

References 14 publications

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“…In the past JTWPAs have had difficulty reaching the quantum limit of added noise due to loss in the transmission line [29]. To characterize the loss and transmission line performance in our device, we measured the amplitude of S 21 and S 11 through both the TWPA and a copper cable of equivalent length.…”

Section: (E)mentioning

confidence: 99%

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Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

White

Mutus

Hoi

et al. 2015

Applied Physics Letters

167

174

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Josephson parametric amplifiers have become a critical tool in superconducting device physics due to their high gain and quantum-limited noise. Traveling wave parametric amplifiers (TWPAs) promise similar noise performance while allowing for significant increases in both bandwidth and dynamic range. We present a TWPA device based on an LC-ladder transmission line of Josephson junctions and parallel plate capacitors using low-loss amorphous silicon dielectric. Crucially, we have inserted λ/4 resonators at regular intervals along the transmission line in order to maintain the phase matching condition between pump, signal, and idler and increase gain. We achieve an average gain of 12 dB across a 4 GHz span, along with an average saturation power of -92 dBm with noise approaching the quantum limit.The Josephson parametric amplifier [1][2][3][4][5][6][7] (JPA) is a critical tool for high fidelity state measurement in superconducting qubits [8][9][10] as it allows parametric amplification with near quantum-limited noise [11]. Despite its success, the JPA has typically been used only for single frequency measurements due to lower bandwidth and saturation power. A promising approach to scaling superconducting qubit experiments is frequency multiplexing [12][13][14], which requires additional bandwidth and dynamic range for each measurement tone. Simultaneous amplification of up to five multiplexed tones has been achieved with a JPA [15-17] but was only possible with the Impedance-transformed parametric amplifier [18] (IMPA). This highly engineered JPA provides much larger bandwidth and saturation power but pushes the resonant design to its low Q limit.To extend this frequency multiplexed approach for future experiments, we have adopted the distributed design of the traveling wave parametric amplifier (TWPA) [19]. Fiber-optic TWPAs have already demonstrated high gain, dynamic range, and bandwidth while reaching the quantum-limit of added noise [20,21]. In this letter we present a microwave frequency TWPA with 4 GHz of bandwidth and an order of magnitude more saturation power than the best JPA. This device is compatible with scaling to much larger qubit systems through multiplexed measurement, and may find applications outside quantum information such as astrophysics detectors [12,22] At microwave frequencies the TWPA can be thought of as a transmission line where the propagation velocity is controlled by varying the individual circuit parameters of inductance or capacitance per unit length [24,25]. This is typically achieved by constructing a signal line with a current dependent (nonlinear) inductance. Like the JPA, a large enough pump tone will modulate this inductance, coupling the pump (ω p ) to a signal (ω s ) and idler (ω i ) tone via frequency mixing such that ω s + ω i = 2ω p . Unlike the JPA however, the TWPA has no resonant structure so gain, bandwidth, and dynamic range are determined by the coupled mode equations of a nonlinear transmission line [23]. In addition to allowing more bandwidth and saturation power...

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Section: (E)mentioning

confidence: 99%

“…A promising approach is to build a TWPA based on the non-linear inductance of the Josephson junction (JJ) [27][28][29][30][31]. This junction TWPA (JTWPA) circuit, shown in Fig.…”

mentioning

confidence: 99%

Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

White

Mutus

Hoi

et al. 2015

Applied Physics Letters

167

174

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“…For this purpose, one can either use broadband traveling wave parametric amplifiers [1,2] or band tunable narrow-band JPAs [3][4][5][6]. The latter are nowadays routinely used to provide amplification with a noise performance close to the standard quantum limit [7][8][9][10][11][12]. Moreover, if operated in the phase sensitive regime, JPAs can even achieve noise temperatures below the standard quantum limit [11,13,14].…”

Section: Introductionmentioning

confidence: 99%

Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers

et al. 2017

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Josephson parametric amplifiers (JPA) have become key devices in quantum science and technology with superconducting circuits. In particular, they can be utilized as quantum-limited amplifiers or as a source of squeezed microwave fields. Here, we report on the detailed measurements of five flux-driven JPAs, three of them exhibiting a hysteretic dependence of the resonant frequency versus the applied magnetic flux. We model the measured characteristics by numerical simulations based on the two-dimensional potential landscape of the dc superconducting quantum interference devices (dc-SQUID), which provide the JPA nonlinearity, for a finite screening parameter βL > 0 and demonstrate excellent agreement between the numerical results and the experimental data. Furthermore, we study the nondegenerate response of different JPAs and accurately describe the experimental results with our theory.

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“…While much of the early work in this field concerns 2d-JJAs, the quantum behavior of 1d-JJAs has also been investigated [11][12][13][14] , and 1d-JJAs have also been described in the context of quantum metamaterials built from integrated qubit chains 4 and the transfer of quantum information with on-chip transmission lines 15 . Other studies treat 1d-JJAs classically, where the nonlinear Josephson inductance is used to amplify signals at the quantum limit 16,17 . The large linear inductance of the 1d-JJA has recently been used to realize a charge qubit immune to low-frequency charge noise 18,19 .…”

Section: Introductionmentioning

confidence: 99%

“…A resonator made from a finite-length transmission line with such an array could find use in circuit cavity QED 23,24 for strongly coupling to the Josephson plasma modes. Nonlinear corrections, briefly discussed in the Appendix, can be used to realize parametric amplification 16,17,[27][28][29][30] and quantum noise squeezing 17,29,33 .…”

Section: Introductionmentioning

confidence: 99%

Josephson junction transmission lines as tunable artificial crystals

et al. 2011

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We investigate one-dimensional Josephson junction arrays with generalized unit cells as a circuit approach to engineer microwave band gaps. An array described by a lattice with a basis can be designed to have a gap in the electromagnetic spectrum, in full analogy to electronic band gaps in diatomic or many-atomic crystals. We derive the dependence of this gap on the array parameters in the linear regime, and suggest experimentally feasible designs to bring the gap below the single junction plasma frequency. The gap can be tuned in a wide frequency range by applying external flux, and it persists in the presence of small imperfections.

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A low-noise series-array Josephson junction parametric amplifier

Cited by 56 publications

References 14 publications

Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

Traveling wave parametric amplifier with Josephson junctions using minimal resonator phase matching

Hysteretic Flux Response and Nondegenerate Gain of Flux-Driven Josephson Parametric Amplifiers

Josephson junction transmission lines as tunable artificial crystals

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