Devices and methods for estimating localization lengths in hybrid superconductor-semiconductor quantum (HSSQ) devices are described. A method for estimating localization lengths in an HSSQ device comprising a set of plunger gates formed in a first layer of the HSSQ device and a set of top gates formed, above the set of plunger gates, in a second layer of the HSSQ device, includes obtaining measurements of nonlocal conductance values associated with the HSSQ device. The at least one junction associated with the HSSQ device attenuates one or more of the measured nonlocal conductance values associated with the HSSQ device. The method further includes normalizing the measured nonlocal conductance values to remove an effect of the attenuation caused by the at least one junction and extracting localization lengths based on the normalized nonlocal conductance values. The method further includes, using a processor, estimating the localization lengths for the HSSQ device.

Devices and methods for estimating localization lengths in hybrid superconductor-semiconductor quantum (HSSQ) devices are described. A method for estimating localization lengths in an HSSQ device comprising a set of plunger gates formed in a first layer of the HSSQ device and a set of top gates formed, above the set of plunger gates, in a second layer of the HSSQ device, includes obtaining measurements of nonlocal conductance values associated with the HSSQ device. The at least one junction associated with the HSSQ device attenuates one or more of the measured nonlocal conductance values associated with the HSSQ device. The method further includes normalizing the measured nonlocal conductance values to remove an effect of the attenuation caused by the at least one junction and extracting localization lengths based on the normalized nonlocal conductance values. The method further includes, using a processor, estimating the localization lengths for the HSSQ device.

A light detection device having improved self-alignment precision using a hard mask, and a method for manufacturing the same is provided. A method of manufacturing a light detection device includes i) providing a substrate; ii) providing a light reflecting portion on the substrate; iii) providing a light detection portion on the light reflection portion; iv) providing an anti-reflection portion provided on the light reflection portion to cover the light detection portion; v) removing each of the first outer periphery of the light reflection portion and the second outer periphery of the anti-reflection portion, and vi) providing a hard mask formed to correspond to the removed first outer periphery, positioned on the substrate, and spaced apart from the light reflecting portion to surround the light reflecting portion.

A light detection device having improved self-alignment precision using a hard mask, and a method for manufacturing the same is provided. A method of manufacturing a light detection device includes i) providing a substrate; ii) providing a light reflecting portion on the substrate; iii) providing a light detection portion on the light reflection portion; iv) providing an anti-reflection portion provided on the light reflection portion to cover the light detection portion; v) removing each of the first outer periphery of the light reflection portion and the second outer periphery of the anti-reflection portion, and vi) providing a hard mask formed to correspond to the removed first outer periphery, positioned on the substrate, and spaced apart from the light reflecting portion to surround the light reflecting portion.

A pipe for a superconducting electrical connection, forming a unit intended to be connected at its ends for a formation of the superconducting electrical connection, includes a cryostat forming a pipe-in-pipe comprising an inner tube and an outer tube which are coaxial and a thermal insulator occupying the annular area between the outer tube and the inner tube; and a superconducting cable core housed inside the inner tube, the superconducting cable core having, at ambient temperature, an excess length with respect to the length of the cryostat such that, in its superconducting state, the length of the cable core is greater than or equal to the length of the cryostat.

A pipe for a superconducting electrical connection, forming a unit intended to be connected at its ends for a formation of the superconducting electrical connection, includes a cryostat forming a pipe-in-pipe comprising an inner tube and an outer tube which are coaxial and a thermal insulator occupying the annular area between the outer tube and the inner tube; and a superconducting cable core housed inside the inner tube, the superconducting cable core having, at ambient temperature, an excess length with respect to the length of the cryostat such that, in its superconducting state, the length of the cable core is greater than or equal to the length of the cryostat.

A Josephson junction (JJ) device is provided. The JJ device comprises an operating JJ, a first hydrogen-trapping JJ having a first end coupled to a first end of the operating JJ and a second end coupled to a first superconductor wire, and a second hydrogen-trapping JJ having a first end coupled to a second end of the operating JJ and a second end coupled to a second superconductor wire. The first hydrogen-trapping JJ and the second hydrogen-trapping JJ mitigates hydrogen diffusion into the operating JJ.

The invention relates to an electrically conducting wire, the wire (4) being formed as a flexible helix with constant or changing slope, with constant or changing diameter and with straight or curved extension, wherein the wire comprises a superconductor. In this way, a wire is provided that comprises a superconductor and that allows small bending radii, especially lower than 15 cm.

A Josephson junction (JJ) device is provided. The JJ device comprises an operating JJ, a first hydrogen-trapping JJ having a first end coupled to a first end of the operating JJ and a second end coupled to a first superconductor wire, and a second hydrogen-trapping JJ having a first end coupled to a second end of the operating JJ and a second end coupled to a second superconductor wire. The first hydrogen-trapping JJ and the second second hydrogen-trapping JJ mitigates hydrogen diffusion into the operating JJ.

A Josephson junction (JJ) device is provided. The JJ device comprises an operating JJ, a first hydrogen-trapping JJ having a first end coupled to a first end of the operating JJ and a second end coupled to a first superconductor wire, and a second hydrogen-trapping JJ having a first end coupled to a second end of the operating JJ and a second end coupled to a second superconductor wire. The first hydrogen-trapping JJ and the second hydrogen-trapping JJ mitigates hydrogen diffusion into the operating JJ.