Abstract: A sensor system is based on diamonds with a high density of NV centers. The description includes a) methods for producing the necessary diamonds of high NV center density, b) characteristics of such diamonds, c) sensing elements for utilizing the fluorescence radiation of such diamonds, d) sensing elements for utilizing the photocurrent of such diamonds, e) systems for evaluating these quantities, f) reduced noise systems for evaluating these systems, g) enclosures for using such systems in automatic placement equipment, h) methods for testing these systems, and i) a musical instrument as an example of an ultimate application of all these devices and methods.

Abstract: A sensor system includes a quantum dot including one or more paramagnetic centers. It comprises a control and evaluation device including a pump radiation source, a radiation receiver and which irradiates the quantum dot depending on a transmission signal. The quantum dot emits fluorescence radiation upon irradiation with the pump radiation, which depends on the magnetic flux density and/or on another physical parameter. The control and evaluation device generates an output signal including a measured value as a function of the fluorescence radiation. The control and evaluation device compensatingly readjusts the sensitivity of the quantum dot for the magnetic flux density and/or the other physical parameter by means of one or more compensation coils.

Abstract: A quantum technological, micro-optical, micro-electronic or photonic system, includes a planar substrate, a microelectronic circuit which is part of the substrate; at least one electrical component comprised within the microelectronic circuit, a micro-optical subdevice which is part of the planar substrate, one or more nanoparticles being diamonds; and a colloidal film, wherein the one or more nanoparticles are comprised within the first portion of the colloidal film. The colloidal film includes the one or more nanoparticles. The system further comprises at least one light-emitting electro-optical component. The light-emitting electro-optical component interacts with the electrical component via the micro-optical subdevice. The one or more nanoparticles include two NV centers. The at least two NV centers interact with one another in a physically observable manner. The interaction between the light-emitting component and the electrical component takes place with involvement of the at least two NV centers.

Abstract: A process embeds functional fibers in a workpiece during selective laser sintering. In a process variant, parts of a powder layer are sintered before the insertion process, for example using a laser beam. A heating device then subsequently re-melts the already melted workpiece parts. Through a channel in the heating device, the functional fiber is fed to the melt or melt-like mass by means of a feed device and inserted into the melt or melt-like mass at the insertion point. Due to the movement of the heating device, the completely or partially melted area moves away from the heating element and is heated less, causing it to cool and solidify comprising the already inserted functional fiber. This variant can also be used for inserting fibers into objects created, for example, by injection molding or extruder-based 3D printing or other additive manufacturing processes.

Abstract: A quantum computer system comprising a relocatable quantum computer and a power supply device for at least partially supplying the quantum computer with electrical energy is provided. The quantum computer system is characterized in that the energy supply device is designed to be relocatable, and in that the energy supply device has a first voltage regulation stage and a second voltage regulation stage and is set up to regulate an electrical energy provided by an energy source to a predetermined voltage value by means of a multi-stage voltage regulation by means of the first voltage regulation stage and the second voltage stage for at least partially supplying the quantum computer.

Abstract: A quantum-technological, micro-electro-optical or micro-electronic or photonic system includes a planar substrate of a direct or indirect semiconductor material. The system includes a microelectronic circuit including at least one transistor or diode. The system further includes a micro-optical subdevice and one or more nanoparticles, having one or more color centers. The surface of the of the planar substrate has a portion of a solidified colloidal film which is firmly bonded to the surface of the substrate. The portion of the solidified colloidal film includes the one or more nanoparticles. The system further includes a light-emitting electro-optical component. The light-emitting electro-optical component interacts optically with the micro-optical subdevice. The light-emitting electro-optical component interacts electrically and/or optically with the electrical component through the micro-optical subdevice.

Abstract: A device includes a substrate including a first layer and a second layer. The first and second layers are positioned adjacent to each other and comprise a common boundary region extending from the first layer to the second layer. The first layer comprises graphite with a Bernal-crystal structure. The second layer comprises graphite with a rhombohedral crystal structure. The boundary region includes a border region having superconducting properties, namely; at a current density of 0 Ampere/m2 and a magnetic flux density of 0 Tesla exhibiting a critical temperature (Tc) which is higher than ?195° C., and/or at a temperature below the critical temperature (Tc) and a current density of 0 Ampere/m2, exhibiting a critical magnetic flux density (Bk) that is higher than 1 Tesla. The border region is coupled to an electric and/or a magnetic and/or an electromagnetic signal with a frequency greater than or equal to 0 Hertz.

Abstract: The invention relates to a single-photon transmission device for enabling secure authentication, said device comprising a plurality of single-photon sources, a control device which is configured to actuate each of the single-photon sources separately, and an optical subdevice which is configured to combine single-photon streams of photons emitted by the at least one single-photon source into a QKD coupling beam consisting of a common stream of single photons. The invention also relates to a single-photon receiving device for receiving a QKD coupling beam transmitted from a single-photon transmission device. The invention also relates to a method for generating a common quantum key for a single-photon transmission device and a single-photon receiving device. The invention also relates to an integrated QKD circuit. The invention also relates to a car key comprising a single-photon transmission device and/or a single-photon receiving device.

Abstract: A current sensor includes a magnetometer. The magnetometer includes a sensor element including at least one paramagnetic center that generates fluorescence radiation, a radiation receiver configured to receive the fluorescence radiation from the sensor element and generate a first electrical signal based on receiving the fluorescence radiation from the sensor element, and an electronic output circuit configured to generate and output a second electrical signal based on the first electrical signal. The value of the fluorescence radiation generated by the sensor element depends in part on a magnetic flux density at the location of the sensor element. The magnetometer is configured to be placed near or in direct contact to a wire carrying a current such that the current in the wire modifies the magnetic flux density at the location of the sensor element.

Abstract: A scalar magnetometer includes a sensor element, a circuit carrier, a pump radiation source, a radiation receiver and evaluation means. The pump radiation source emits pump radiation. The sensor element preferably includes one or more NV centers in diamond as paramagnetic centers. This paramagnetic center emits fluorescence radiation when irradiated with pump radiation. The radiation receiver converts a intensity signal of the fluorescence radiation into a receiver output signal. The evaluation means detects and/or stores and/or transmits the value of the receiver output signal. The material of the circuit carrier is preferably transparent for the pump radiation in the radiation path between pump radiation source and sensor element and transparent for the fluorescence radiation in the radiation path between sensor element and radiation receiver. The components sensor element, pump radiation source, radiation receiver and evaluation means are preferably mechanically attached to the circuit carrier.

Abstract: A quantum computer system includes a quantum computer and a quantum computer monitoring device. The quantum computer runs a quantum computer program with a quantum computer program flow. The quantum computer monitoring device monitors the correct quantum computer program flow of the quantum computer program of the quantum computer. The quantum computer monitoring device is arranged to detect hardware and/or software errors that occur during operation. A method includes monitoring the operation of the quantum computer by a quantum computer monitoring device to detect hardware and/or software errors that occur during operation.

Abstract: A sensor system is based on diamonds with a high density of NV centers. The description includes a) methods for producing the necessary diamonds of high NV center density, b) characteristics of such diamonds, c) sensing elements for utilizing the fluorescence radiation of such diamonds, d) sensing elements for utilizing the photocurrent of such diamonds, e) systems for evaluating these quantities, f) reduced noise systems for evaluating these systems, g) enclosures for using such systems in automatic placement equipment, h) methods for testing these systems, and i) a musical instrument as an example of an ultimate application of all these devices and methods.

Abstract: A quantum computer system includes a quantum computer and a quantum computer monitoring device. The quantum computer runs a quantum computer program with a quantum computer program flow. The quantum computer monitoring device monitors the correct quantum computer program flow of the quantum computer program of the quantum computer. The quantum computer monitoring device is arranged to detect hardware and/or software errors that occur during operation. A method includes monitoring the operation of the quantum computer by a quantum computer monitoring device to detect hardware and/or software errors that occur during operation.

Abstract: A control device includes a data bus interface, which can be a CAN bus data bus interface, a computer core (microcontroller) and a number nLED of a plurality of driver circuits, wherein nLED is a positive integer greater than 1. Each driver circuit is designed to be able to supply at least one lamp group with electrical power. The nLED driver circuits are thus designed to be able to supply at least nLED lamp groups with electrical power. Each lamp group comprises one or more lamps, which can comprise one or more light-emitting diodes. The data bus interface and the computer core (microcontroller) and the nLED driver circuits are accommodated on a common semiconductor substrate.

Abstract: A sensor system is based on diamonds with a high density of NV centers. The description includes a) methods for producing the necessary diamonds of high NV center density, b) characteristics of such diamonds, c) sensing elements for utilizing the fluorescence radiation of such diamonds, d) sensing elements for utilizing the photocurrent of such diamonds, e) systems for evaluating these quantities, f) reduced noise systems for evaluating these systems, g) enclosures for using such systems in automatic placement equipment, g) methods for testing these systems, and h) a musical instrument as an example of an ultimate application of all these devices and methods.

Abstract: A control device includes a data bus interface, which can be a CAN bus data bus interface, a computer core (microcontroller) and a number nLED of a plurality of driver circuits, wherein nLED is a positive integer greater than 1. Each driver circuit is designed to be able to supply at least one lamp group with electrical power. The nLED driver circuits are thus designed to be able to supply at least nLED lamp groups with electrical power. Each lamp group comprises one or more lamps, which can comprise one or more light-emitting diodes. The data bus interface and the computer core (microcontroller) and the nLED driver circuits are accommodated on a common semiconductor substrate.

Abstract: A scalar magnetometer includes a sensor element, a circuit carrier, a pump radiation source, a radiation receiver and evaluation means. The pump radiation source emits pump radiation. The sensor element preferably includes one or more NV centers in diamond as paramagnetic centers. This paramagnetic center emits fluorescence radiation when irradiated with pump radiation. The radiation receiver converts a intensity signal of the fluorescence radiation into a receiver output signal. The evaluation means detects and/or stores and/or transmits the value of the receiver output signal. The material of the circuit carrier is preferably transparent for the pump radiation in the radiation path between pump radiation source and sensor element and transparent for the fluorescence radiation in the radiation path between sensor element and radiation receiver. The components sensor element, pump radiation source, radiation receiver and evaluation means are preferably mechanically attached to the circuit carrier .

Abstract: A process embeds functional fibers in a workpiece during selective laser sintering. In a process variant, parts of a powder layer are sintered before the insertion process, for example using a laser beam. A heating device then subsequently re-melts the already melted workpiece parts. Through a channel in the heating device, the functional fiber is fed to the melt or melt-like mass by means of a feed device and inserted into the melt or melt-like mass at the insertion point. Due to the movement of the heating device, the completely or partially melted area moves away from the heating element and is heated less, causing it to cool and solidify comprising the already inserted functional fiber. This variant can also be used for inserting fibers into objects created, for example, by injection molding or extruder-based 3D printing or other additive manufacturing processes.

Abstract: A quantum bit including a quantum dot may in particular include an NV center. A nuclear quantum bit includes at least one nuclear quantum dot, which is typically a nuclear spin afflicted isotope. The quantum dot and nuclear quantum dot include a device for controlling the quantum dot and nuclear quantum dot. Compounded therefrom, a quantum register includes at least two quantum bits, and a nuclear quantum register includes at least two nuclear quantum bits. A nucleus-electron quantum register includes one quantum bit and one nuclear quantum bit, and a nucleus-electron-nucleus-electron quantum register includes at least one quantum register and at least two nucleus-electron registers. A higher-level structure, a quantum bus, for transporting a quantum information and a quantum computer composed thereof are part of the disclosure. Also included are methods necessary to fabricate and operate the device.

Abstract: A sensor system includes a quantum dot including one or more paramagnetic centers. It comprises a control and evaluation device including a pump radiation source, a radiation receiver and which irradiates the quantum dot depending on a transmission signal. The quantum dot emits fluorescence radiation upon irradiation with the pump radiation, which depends on the magnetic flux density and/or on another physical parameter. The control and evaluation device generates an output signal including a measured value as a function of the fluorescence radiation. The control and evaluation device compensatingly readjusts the sensitivity of the quantum dot for the magnetic flux density and/or the other physical parameter by means of one or more compensation coils.