A scalable readout system for a superconducting adiabatic quantum optimization system
نویسندگان
چکیده
We have designed, fabricated and tested an XYaddressable readout architecture for superconducting flux qubits in an integrated circuit designed to enable adiabatic quantum optimization algorithms. The readout architecture for an N-qubit system comprises N hysteretic dc SQUIDs and N rf SQUID latches controlled with 2 √ N +2 wires. The latching elements are coupled to the qubits and provide exceptional readout fidelity. The dc SQUIDs are then coupled to the latches to provide coarse readout. A key advantage of this architecture is that the latches are unaffected by the ac currents generated in the dc SQUIDs during switching. We place a lower bound on the readout fidelity of 99.9999% in an 8 qubit test system.
منابع مشابه
A scalable control system for a superconducting adiabatic quantum optimization processor
We have designed, fabricated and operated a scalable system for applying independently programmable timeindependent, and limited time-dependent flux biases to control superconducting devices in an integrated circuit. Here we report on the operation of a system designed to supply 64 flux biases to devices in a circuit designed to be a unit cell for a superconducting adiabatic quantum optimizatio...
متن کاملMaster ’ s Thesis Readout and Control of Semiconductor - Nanowire - Based Superconducting Qubits
Superconducting quantum bits (qubits) are promising candidates for scalable, fault-tolerant quantum computation. Being able to determine a quantum state with a single measurement is essential for using any quantum system for computation. In this thesis single shot readout is implemented for hybrid semiconductor based superconducting qubits by integrating a near quantum limited parametric amplif...
متن کاملExperimental signature of programmable quantum annealing.
Quantum annealing is a general strategy for solving difficult optimization problems with the aid of quantum adiabatic evolution. Both analytical and numerical evidence suggests that under idealized, closed system conditions, quantum annealing can outperform classical thermalization-based algorithms such as simulated annealing. Current engineered quantum annealing devices have a decoherence time...
متن کاملDigitized adiabatic quantum computing with a superconducting circuit.
Quantum mechanics can help to solve complex problems in physics and chemistry, provided they can be programmed in a physical device. In adiabatic quantum computing, a system is slowly evolved from the ground state of a simple initial Hamiltonian to a final Hamiltonian that encodes a computational problem. The appeal of this approach lies in the combination of simplicity and generality; in princ...
متن کاملMeasurement of the ground - state flux diagram of three coupled qubits as a first step towards the demonstration of adiabatic quantum computation
– The ground state susceptibility of a system consisting of three flux-qubits was measured in the complete three dimensional flux space around the common degeneracy point of the qubits. The system’s Hamiltonian could be completely reconstructed from measurements made far away from the common degeneracy point. The subsequent measurements made around this point show complete agreement with the th...
متن کامل