Abstract: There is described a device and method for utilizing an integrated multiplexer to perform additional functionalities other than signal routing using one or more interleaved input signals. Each interleaved signal includes a data signal interleaved with a proxy signal. In between routing operations of the data signal, the proxy signal from each interleaved signal can be routed to perform phase locking and/or switch bias locking. The routed proxy signal can be interfered with a global reference signal to produce a beat signal, the phase of which can be used to generate a feedback signal to maintain a desired phase relation between the data signal and the global reference signal. The signal strength of the routed proxy signal can also be detected so that a dithering technique may be used to adjust a bias voltage to the MUX switch to maintain an optimal operating state.

Abstract: There is described an optical apparatus having an optical fiber link propagating an optical signal; a first device coupled with a first fiber portion of the link and configured for imparting a phase changing contribution thereto; and a second device coupled with a second fiber portion of the link and configured for imparting a phase changing contribution thereto, the second device operating within a second response frequency range having a maximum value greater than a maximum value of a first response frequency range of the first device; wherein, upon the optical signal experiencing a phase change including a frequency value greater than the first response frequency range, the first device imparts a first phase change at a first response frequency value within the first response frequency range, and the second device imparts a second phase change at a second response frequency value greater than the first response frequency range.

Abstract: An apparatus for facilitating electromagnetic wave resonator tuning is disclosed, including first, second, and third spaced apart resonator portions, the second portion disposed between the first and third to form an electromagnetic wave resonator having a resonant frequency, wherein the first and second portions define a first volume therebetween and the second and third define a second volume therebetween, a first actuator coupled to the first portion, the second, or both, the first actuator configured to adjust a width of the first volume, and a second actuator coupled to the second portion, the third, or both, the second actuator configured to adjust a width of the second volume, wherein the actuators are configured to decrease the widths of the first and second volumes or increase the widths of the first and second volumes to adjust the resonant frequency of the resonator. Other apparatuses, methods, and systems are also disclosed.

Abstract: An architecture for fault-tolerant universal quantum computation is suited for matter qubits, such as donor qubits in silicon, coupled by a network of photonic interconnects. The basic operational building blocks are local measurements and unitaries, plus an entangling measurement of non-local Pauli operators. 3D graph states created by applying deterministic entangling measurements to pairs of qubits in knitting and fusion processes to yield resource states for one way computing. The deterministic entangling measurements are facilitated by configuring the network with active switches to allow single photons to interact with pairs of matter qubits.

Abstract: A system and method are provided to enable non-quantum experts to schematically represent, simulate and quantify the performance of physically realistic photonic quantum circuits. The framework offers the flexibility for users—not necessarily familiar with the fundamentals of quantum mechanics—to create circuits and work with simple inputs and outputs, while the complexities of manipulating high dimensionality quantum Hilbert spaces supporting photonic and physical quantum object states are handled with the use of purpose-built tools. The tools include a user-friendly method for defining classical photonic circuits which may be coupled to physical objects such as qubits, quantum input states, as well as classical and quantum measurement devices. The tools feature classical-to-quantum S-matrix conversion, quantum S-matrix extraction, as well as capabilities for defining and extracting quantum error parameters.

Abstract: An apparatus for facilitating electromagnetic wave resonator tuning is disclosed, including first, second, and third spaced apart resonator portions, the second portion disposed between the first and third to form an electromagnetic wave resonator having a resonant frequency, wherein the first and second portions define a first volume therebetween and the second and third define a second volume therebetween, a first actuator coupled to the first portion, the second, or both, the first actuator configured to adjust a width of the first volume, and a second actuator coupled to the second portion, the third, or both, the second actuator configured to adjust a width of the second volume, wherein the actuators are configured to decrease the widths of the first and second volumes or increase the widths of the first and second volumes to adjust the resonant frequency of the resonator. Other apparatuses, methods, and systems are also disclosed.

Abstract: A system and method are provided to enable non-quantum experts to schematically represent, simulate and quantify the performance of physically realistic photonic quantum circuits. The framework offers the flexibility for users—not necessarily familiar with the fundamentals of quantum mechanics—to create circuits and work with simple inputs and outputs, while the complexities of manipulating high dimensionality quantum Hilbert spaces supporting photonic and physical quantum object states are handled with the use of purpose-built tools. The tools include a user-friendly method for defining classical photonic circuits which may be coupled to physical objects such as qubits, quantum input states, as well as classical and quantum measurement devices. The tools feature classical-to-quantum S-matrix conversion, quantum S-matrix extraction, as well as capabilities for defining and extracting quantum error parameters.