Driving the common-mode of a josephson parametric converter using a three-port power divider

a common-mode, three-port technology, applied in parametric amplifiers, modulation transference by superconductive devices, pulse techniques, etc., can solve problems such as reducing the dynamic range of the jpc, limiting the scalability of hardware, and adding complexity to the design and fabrication process

Active Publication Date: 2016-12-29
IBM CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of this bulky hardware limits scalability.
To solve this problem, one can design and implement broadband hybrids on-chip but this would add complexity to the design and fabrication processes.
Feeding the pump and the signal (or idler) tones to the JPC through the same coupling capacitors poses a tradeoff between the device bandwidth and dynamic range.
This softens the pump drive (makes it less “stiff”) and consequently decreases the dynamic range of the JPC.

Method used

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  • Driving the common-mode of a josephson parametric converter using a three-port power divider
  • Driving the common-mode of a josephson parametric converter using a three-port power divider
  • Driving the common-mode of a josephson parametric converter using a three-port power divider

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Embodiment Construction

[0017]The present principles are directed to driving the common-mode of a Josephson Parametric Converter (JPC) using a three-port power divider.

[0018]In the JPC, the incoming and outgoing signals to (in) and from (out) of the device travel on the same transmission lines and feedlines.

[0019]In an embodiment, we couple the pump drive and the signal (or idler) tones to the JPC using separate feedlines and coupling capacitors. The signal and idler tones would continue to be fed through the coupling capacitors of the JPC resonators, but the pump drive would be fed to the JPC through a lossless on-chip three-port power divider capacitively coupled to the Josephson ring modulator (JRM) of the JPC. The power divider would split the input signal equally between the two output ports and the split signals would have equal phase (in order to excite the common mode).

[0020]The present principles provide many attendant advantages over the prior art. Some of these many attendant advantages will now...

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Abstract

An on-chip Josephson parametric converter is provided. The on-chip Josephson parametric converter includes a Josephson ring modulator. The on-chip Josephson parametric converter further includes a lossless power divider, coupled to the Josephson ring modulator, having a single input port and two output ports for receiving a pump drive signal via the single input port, splitting the pump drive signal symmetrically into two signals that are equal in amplitude and phase, and outputting each of the two signals from a respective one of the two output ports. The pump drive signal excites a common mode of the on-chip Josephson parametric converter.

Description

BACKGROUND[0001]Technical Field[0002]The present invention relates generally to electronic devices and, in particular, to driving the common-mode of a Josephson parametric converter using a three-port power divider.[0003]Description of the Related Art[0004]A Josephson ring modulator (JRM) is a nonlinear dispersive element based on Josephson tunnel junctions that can perform three-wave mixing of microwave signals at the quantum limit. The JRM consists of Josephson Junctions (JJs). In order to construct a non-degenerate parametric device that is the Josephson parametric converter (JPC), which is capable of amplifying and / or mixing microwave signals at the quantum limit, the JRM is coupled to two different microwave resonators.[0005]In microstrip JPCs, as well as compact and shunted JPCs, the pump drive which provides the energy for the amplification process is fed through the sum port (Σ) of a 180 degree hybrid coupler. The difference port (Δ) of the same hybrid is used to feed the di...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H03K19/195
CPCH03K3/38H03K19/1954H01P5/12H01P5/103H01P5/16H03F19/00H10N60/805H10N60/0912H01P5/19H01P11/001H03D7/005H03F7/00
Inventor ABDO, BALEEGH
Owner IBM CORP
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