A hysteretic magnetic Josephson junction (HMJJ) device is provided that comprises a non-magnetic spacer disposed between a first ferromagnetic layer and a second ferromagnetic layer, a first ferrimagnetic layer having a first side disposed on a side of the first ferromagnetic layer opposite the non-magnetic spacer, and a second ferrimagnetic layer having a first side disposed on a side of the second ferromagnetic layer opposite the non-magnetic spacer. The first ferrimagnetic layer and the second ferrimagnetic layer are formed from a composition that provides orthogonally magnetic responses relative to the magnetic responses of the first ferromagnetic layer and the second ferromagnetic layer. The HMJJ further comprises a first superconducting material layer having a first side disposed on a second side of the first ferromagnetic layer and a second superconducting material layer having a first side disposed on a second side of the second ferromagnetic layer.

A hysteretic magnetic Josephson junction (HMJJ) device is provided that comprises a non-magnetic spacer disposed between a first ferromagnetic layer and a second ferromagnetic layer, a first ferrimagnetic layer having a first side disposed on a side of the first ferromagnetic layer opposite the non-magnetic spacer, and a second ferrimagnetic layer having a first side disposed on a side of the second ferromagnetic layer opposite the non-magnetic spacer. The first ferrimagnetic layer and the second ferrimagnetic layer are formed from a composition that provides orthogonally magnetic responses relative to the magnetic responses of the first ferromagnetic layer and the second ferromagnetic layer. The HMJJ further comprises a first superconducting material layer having a first side disposed on a second side of the first ferromagnetic layer and a second superconducting material layer having a first side disposed on a second side of the second ferromagnetic layer.

A hysteretic magnetic Josephson junction (HMJJ) device is provided that comprises a non-magnetic spacer disposed between a first ferromagnetic layer and a second ferromagnetic layer, a first ferrimagnetic layer having a first side disposed on a side of the first ferromagnetic layer opposite the non-magnetic spacer, and a second ferrimagnetic layer having a first side disposed on a side of the second ferromagnetic layer opposite the non-magnetic spacer. The first ferrimagnetic layer and the second ferrimagnetic layer are formed from a composition that provides orthogonally magnetic responses relative to the magnetic responses of the first ferromagnetic layer and the second ferromagnetic layer. The HMJJ further comprises a first superconducting material layer having a first side disposed on a second side of the first ferromagnetic layer and a second superconducting material layer having a first side disposed on a second side of the second ferromagnetic layer.

A hysteretic magnetic Josephson junction (HMJJ) device is provided that comprises a non-magnetic spacer disposed between a first ferromagnetic layer and a second ferromagnetic layer, a first ferrimagnetic layer having a first side disposed on a side of the first ferromagnetic layer opposite the non-magnetic spacer, and a second ferrimagnetic layer having a first side disposed on a side of the second ferromagnetic layer opposite the non-magnetic spacer. The first ferrimagnetic layer and the second ferrimagnetic layer are formed from a composition that provides orthogonally magnetic responses relative to the magnetic responses of the first ferromagnetic layer and the second ferromagnetic layer. The HMJJ further comprises a first superconducting material layer having a first side disposed on a second side of the first ferromagnetic layer and a second superconducting material layer having a first side disposed on a second side of the second ferromagnetic layer.

A novel and useful quantum computing machine architecture that includes a classic computing core as well as a quantum computing core. A programmable pattern generator executes sequences of instructions that control the quantum core. In accordance with the sequences, a pulse generator functions to generate the control signals that are input to the quantum core to perform quantum operations. A partial readout of the quantum state in the quantum core is generated that is subsequently re-injected back into the quantum core to extend decoherence time. Access gates control movement of quantum particles in the quantum core. Errors are corrected from the partial readout before being re-injected back into the quantum core. Internal and external calibration loops calculate error syndromes and calibrate the control pulses input to the quantum core. Control of the quantum core is provided from an external support unit via the pattern generator or can be retrieved from classic memory where sequences of commands for the quantum core are stored a priori in the memory. A cryostat unit functions to provide several temperatures to the quantum machine including a temperature to cool the quantum computing core to approximately 4 Kelvin.

Novel and useful quantum structures that provide various control functions. Particles are brought into close proximity to interact with one another and exchange information. After entanglement, the particles are moved away from each other but they still carry the information contained initially. Measurement and detection are performed on the particles from the entangled ensemble to determine whether the particle is present or not in a given qdot. A quantum interaction gate is a circuit or structure operating on a relatively small number of qubits. Quantum interaction gates implement several quantum functions including a controlled NOT gate, quantum annealing gate, controlled SWAP gate, a controlled Pauli rotation gate, and ancillary gate. These quantum interaction gates can have numerous shapes including double V shape, H shape, X shape, L shape, I shape, etc.

Novel and useful quantum structures having a continuous well with control gates that control a local depletion region to form quantum dots. Local depleted well tunneling is used to control quantum operations to implement quantum computing circuits. Qubits are realized by modulating gate potential to control tunneling through local depleted region between two or more sections of the well. Complex structures with a higher number of qdots per continuous well and a larger number of wells are fabricated. Both planar and 3D FinFET semiconductor processes are used to build well to gate and well to well tunneling quantum structures. Combining a number of elementary quantum structure, a quantum computing machine is realized. An interface device provides an interface between classic circuitry and quantum circuitry by permitting tunneling of a single quantum particle from the classic side to the quantum side of the device. Detection interface devices detect the presence or absence of a particle destructively or nondestructively.

Novel and useful electronic and magnetic control of several quantum structures that provide various control functions. An electric field provides control and is created by a voltage applied to a control terminal. Alternatively, an inductor or resonator provides control. An electric field functions as the main control and an auxiliary magnetic field provides additional control on the control gate. The magnetic field is used to control different aspects of the quantum structure. The magnetic field impacts the spin of the electron by tending to align to the magnetic field. The Bloch sphere is a geometrical representation of the state of a two-level quantum system and defined by a vector in x, y, z spherical coordinates. The representation includes two angles θ and φ whereby an appropriate electrostatic gate control voltage signal is generated to control the angle θ of the quantum state and an appropriate control voltage to an interface device generates a corresponding electrostatic field in the quantum structure to control the angle φ.

A novel and useful quantum computing machine architecture that includes a classic computing core as well as a quantum computing core. A programmable pattern generator executes sequences of instructions that control the quantum core. In accordance with the sequences, a pulse generator functions to generate the control signals that are input to the quantum core to perform quantum operations. A partial readout of the quantum state in the quantum core is generated that is subsequently re-injected back into the quantum core to extend decoherence time. Access gates control movement of quantum particles in the quantum core. Errors are corrected from the partial readout before being re-injected back into the quantum core. Internal and external calibration loops calculate error syndromes and calibrate the control pulses input to the quantum core. Control of the quantum core is provided from an external support unit via the pattern generator or can be retrieved from classic memory where sequences of commands for the quantum core are stored a priori in the memory. A cryostat unit functions to provide several temperatures to the quantum machine including a temperature to cool the quantum computing core to approximately 4 Kelvin.

Systems and methods related to scheduling of tasks for execution in parallel based on geometric reach are described. An example method includes using a processor, processing information pertaining to a type of task to generate a plurality of areas of reach, where each of the plurality of areas of reach corresponds to a portion of a shared space. The method further includes using the processor, generating a plurality of inflated areas of reach by inflating each of the plurality of areas of reach based on a task-specific factor pertinent to the type of task. The method further includes automatically scheduling parallel execution of tasks associated with any of the plurality of inflated areas of reach satisfying a spatial constraint.