Systems, devices, articles, methods, and techniques for advancing quantum computing by removing unwanted interactions in one or more quantum processor. One approach includes creating an updated plurality of programmable parameters based at least in part on a received value for the characteristic magnetic susceptibility of the qubit in the at least one quantum processor, and returning the updated plurality of programmable parameters. Examples programmable parameters include local biases, and coupling values characterizing the problem Hamilton. Also, for example, a quantum processor may be summarized as including a first loop of superconducting material, a first compound Josephson junction interrupting the first loop of superconducting material, a first coupler inductively coupled to the first loop of superconducting material, a second coupler inductively coupled to the first loop of superconducting material, and a second loop of superconducting material proximally placed to the first loop of superconducting material inductively coupled to the first coupler and the second coupler.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A computational system comprising: at least one quantum processor comprising: a plurality of qubits; a plurality of couplers, wherein each coupler provides controllable communicative coupling between a respective pair qubits of the plurality of qubits; and a plurality of magnetic susceptibility compensators, wherein each magnetic susceptibility compensator is proximate to a respective qubit of the plurality of qubits; at least one processor-based device communicatively coupled to the at least one quantum processor; and at least one non-transitory computer-readable storage medium communicatively coupled to the at least one processor-based device and which stores processor-executable instructions, which when executed causes at least one processor-based device to: initialize the quantum processor to an initial state; cause the quantum processor to evolve from the initial state toward a final state; and cause the quantum processor to add a flux bias to the plurality of magnetic susceptibility compensators. 2. The system of claim 1 further comprising: a global signal line, wherein the global signal line communicably couples to the plurality of magnetic susceptibility compensators. 3. The system of claim 2 wherein the processor-executable instructions when executed further cause the at least one processor to: cause the quantum processor to add a signal on the global signal line. 4. The system of claim 1 further comprising: a plurality of inductance tuners, wherein each inductance tuner interrupts a circuit in each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators. 5. The system of claim 4 wherein the processor-executable instructions when executed further cause the at least one processor to: cause the quantum processor to tune each of the plurality of inductance tuners to a respective value such that each circuit in each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators has a respective magnetic susceptibility opposite to the magnetic susceptibility of each qubit associated with each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators. 6. A computational method for operating a hybrid computer that comprises both a quantum processor and at least one processor-based device communicatively coupled to one another, the quantum processor comprising a plurality of qubits, a plurality of coupling devices, wherein each coupling device provides controllable communicative coupling between two of the plurality of qubits, and a plurality of magnetic susceptibility compensators, wherein each magnetic susceptibility compensator is proximate to a respective qubit of the plurality of qubits, the method comprising: initializing the quantum processor to an initial state; causing the quantum processor to evolve from the initial state toward a final state; and causing the quantum processor to add a flux bias to the plurality of magnetic susceptibility compensators. 7. The method of claim 6 further comprising: reading out states for the qubits in plurality of qubits of the quantum processor. 8. The method of claim 6 wherein the hybrid computer further comprises a global signal line, wherein the global signal line communicably couples to the plurality of magnetic susceptibility compensators; and the method further comprising: adding a signal on the global signal line. 9. The method of claim 6 wherein the hybrid computer further comprises a plurality of inductance tuners, wherein each inductance tuner interrupts a circuit in each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators; and the method further comprising: tuning each of the plurality of inductance tuners to a respective value such that each circuit in each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators has a respective magnetic susceptibility opposite to the magnetic susceptibility of each qubit associated with each magnetic susceptibility compensator in the plurality of magnetic susceptibility compensators. 10. A system for use in quantum processing, comprising: at least one non-transitory processor-readable medium that stores at least one of processor executable instructions or data; and at least one processor communicatively coupled to the at least one non-transitory processor-readable medium, and which, in response to execution of the at least one of processor executable instructions or data: receive a plurality of programmable parameters for at least one quantum processor, the programmable parameters which characterize a problem Hamilton; receive a value for a characteristic mutual inductance of antiferromagnetic coupling for the at least one quantum processor receive a value for a characteristic magnetic susceptibility of a qubit in the at least one quantum processor; create an updated plurality of programmable parameters based at least in part on the received value for the characteristic magnetic susceptibility of the qubit in the at least one quantum processor; and return the updated plurality of programmable parameters. 11. The system of claim 10 wherein the plurality of programmable parameters for the at least one quantum processor comprises: a plurality of local biases and a plurality of coupling values characterizing the problem Hamilton. 12. The system of claim 10 wherein the plurality of programmable parameters for the at least quantum processor comprises: a plurality of local biases; and wherein the processor-executable instructions when executed further cause the at least one processor to: construct a correction matrix; solve a linear system including a first vector, corresponding to a plurality of local biases, equal to the correction matrix right multiplied by a second vector, corresponding to a plurality of updated local biases, for the second vector; and return the plurality of updated local biases. 13. The system of claim 12 wherein: the correction matrix is symmetric; the correction matrix includes a plurality of diagonal entries and the diagonal entries are one; and the correction matrix includes a plurality of off-diagonal entries and each off-diagonal entry corresponds to a respective coupling in the problem Hamiltonian and is a product of: a respective coupling value of a plurality of coupling values, the value for the characteristic mutual inductance of antiferromagnetic coupling, and the value for the characteristic magnetic susceptibility of a qubit. 14. The system of claim 10 wherein the plurality of programmable parameters for the at least quantum processor comprises: a plurality of coupling values; and wherein the processor-executable instructions when executed further cause the at least one processor to: receive a mapping of a plurality of logical qubits defined on the at least quantum processor, wherein each logical qubit in the plurality of logical qubits includes a plurality of physical qubits, and a plurality of intra-logical qubit coupler; update a coupling value for an extra-logical qubit coupler to a logical qubit in the plurality of logical qubits; and return the updated coupling value for the extra-logical qubit coupler. 15. The system of claim 10 further comprising: at least one quantum processor comprising: a plurality of qubits; a plurality of couplers, wherein each coupler provides controllable communicative coupling between a respective pair of the plurality of qubits; a programming sub-system; and an evolution sub-system. 16. The system of claim 15 wherein the processor-executable instructions when executed further cause the at least one processor to: initialize the quantum processor, via the programming sub-system, to an initial state; and cause, via the evolution sub-system, the quantum processor to evolve from the initial state toward a final state characterized by the problem Hamiltonian. 17. A computational method comprising: receiving a plurality of programmable parameters for at least one quantum processor, the programmable parameters which characterize a problem Hamilton; receiving a value for a characteristic mutual inductance of antiferromagnetic coupling for the at least one quantum processor receiving a value for a characteristic magnetic susceptibility of a qubit in the at least one quantum processor; creating an updated plurality of programmable parameters based at least in part on the received value for the characteristic magnetic susceptibility of the qubit in the at least one quantum processor; and returning the updated plurality of programmable parameters. 18. The method of claim 17 wherein the plurality of programmable parameters for the at least quantum processor comprises a plurality of local biases; and the method further comprising: constructing a correction matrix; solving a linear system where the linear system includes a first vector, corresponding to a plurality of local biases, equal to the correction matrix right multiplied by a second vector, corresponding to a plurality of updated local biases, for the second vector; and returning the plurality of updated local biases. 19. The method of claim 18 wherein: the correction matrix is symmetric; the correction matrix includes a plurality of diagonal entries and the diagonal entries are one; and the correction matrix includes a plurality of off-diagonal entries and each off-diagonal entry corresponds to a respective coupling in the problem Hamiltonian and is a product of: a respective coupling value of a plurality of coupling values, the value for the characteristic mutual inductance of antiferromagnetic coupling, and the value for the characteristic magnetic susceptibility of a qubit. 20. The method of claim 17 wherein the plurality of programmable parameters for the at least quantum processor comprises a plurality of coupling values, and the method further comprising: receiving a mapping of a plurality of logical qubits defined on the at least quantum processor, wherein each logical qubit in the plurality of logical qubits includes a plurality of physical qubits, and a plurality of intra-logical qubit coupler; updating a coupling value for an extra-logical qubit coupler to a logical qubit in the plurality of logical qubits; and returning the updated coupling value for the extra-logical qubit coupler. 21. The method of claim 20 further comprising forming the updated coupling value for the extra-logical qubit coupler from the coupling value minus a correction term, and forming the correction term from a product, wherein the product includes: the value for the characteristic mutual inductance of antiferromagnetic coupling, the value for the characteristic magnetic susceptibility of a qubit, and a sum over the product of the coupling value for the extra-logical qubit coupler, and a plurality of inter-logical qubit coupling values. 22. A quantum processor, comprising: a first loop of superconducting material, that superconducts below a critical temperature; a first compound Josephson junction interrupting the first loop of superconducting material; a first coupler inductively coupled to the first loop of superconducting material; a second coupler inductively coupled to the first loop of superconducting material; and a second loop of superconducting material, that superconducts below a critical temperature, proximally placed to the first loop of superconducting material inductively coupled to the first coupler, and inductively coupled to the second coupler. 23. The quantum processor of claim 22 further comprising: a tunable inductance interrupting the second loop of superconducting material. 24. The quantum processor of claim 22 further comprising: a global signal line inductively coupled to the second loop of superconducting material. 25. The quantum processor of claim 22 wherein the global signal line inductively coupled to the first loop of superconducting material. 26. The quantum processor of claim 25 wherein: the global signal line inductively coupled to the second loop of superconducting material has a first mutual inductance value; the global signal line inductively coupled to the second loop of superconducting material has a second mutual inductance value associated with; the second loop of superconducting material inductively coupled to the first coupler has a third mutual inductance value; the first coupler inductively coupled to the first loop of superconducting material has a fourth mutual inductance value; and wherein a first ratio of the first mutual inductance value to the second mutual inductance value equals a second ratio of the third mutual inductance value to the fourth mutual inductance value.