Abstract: The is provided a computer-implemented method for generating a quantum circuit from a Unitary Coupled Cluster (UCC) Ansatz, wherein the Ansatz represents an excitation of a reference state by a parameterised operator including excitation operators, and wherein the Ansatz includes multi-qubit Pauli operators that are determined from each excitation operator. The method comprises: partitioning the Pauli operators into mutually commuting sets and sequencing the Pauli operators by set; generating Pauli gadgets from the Pauli operators by Trotterization, wherein the Pauli gadgets have a same sequencing by set as the Pauli operators; diagonalising each set of Pauli gadgets to convert the Pauli gadgets into phase gadgets; and transforming the phase gadgets into one- and two-qubit native gates to generate the quantum circuit. Moreover, there is also provided a system that is configured to implement the method.

Abstract: Concepts, systems and methods are described for generating a quantum circuit from a Unitary Coupled Cluster (UCC) ansatz which represents the excitation of a reference state by a parameterised operator including excitation operators. The UCC ansatz includes multi-qubit Pauli operators, referred to as Pauli strings, determined from each excitation operator. The method comprises partitioning the Pauli strings into mutually commuting sets and sequencing the Pauli strings by set. Pauli gadgets are then generated from the Pauli strings by Trotterization, the Pauli gadgets having the same sequencing by set as the Pauli strings. Each set of Pauli gadgets is diagonalised to convert the Pauli gadgets into phase gadgets which are then transformed into one- and two-qubit native gates to generate the quantum circuit.

Abstract: Concepts, systems and methods are described for generating a quantum circuit from a Unitary Coupled Cluster (UCC) ansatz which represents the excitation of a reference state by a parameterised operator including excitation operators. The UCC ansatz includes multi-qubit Pauli operators, referred to as Pauli strings, determined from each excitation operator. The method comprises partitioning the Pauli strings into mutually commuting sets and sequencing the Pauli strings by set. Pauli gadgets are then generated from the Pauli strings by Trotterization, the Pauli gadgets having the same sequencing by set as the Pauli strings. Each set of Pauli gadgets is diagonalised to convert the Pauli gadgets into phase gadgets which are then transformed into one- and two-qubit native gates to generate the quantum circuit.

Abstract: A steerable catheter includes a brake mechanism with a knob mounted to a catheter handle body. The knob is rotatable around a knob axis, and the catheter handle body includes at least one steering control spool rotatable around a spool axis that is orthogonal to the knob axis. The knob contacts and rotates in a limited arc along a recessed handle body surface between stop surfaces. A frictional braking element in mechanical communication, along the knob axis, with the knob is disposed adjacent the at least one steering control spool and actuatable into and out of contact with a contact surface of the at least one spool upon rotation of the knob around the knob axis.

Abstract: This disclosure discloses various vehicle-to-everything (V2X) wireless communication processes that use switching diversity to improve coverage over that of a single transmit antenna. Switching diversity may be implemented by alternating the transmit antennas according to a certain switching pattern. A V2X device determines a pattern for alternating a plurality of antennas for transmitting data packets. The V2X device selects, based on the pattern, a first antenna of the plurality of antennas, and transmit a first packet of the data packets using the first antenna. The V2X device further select, based on the pattern, a second antenna of the plurality of antennas, and transmit a second packet of the data packets using the second antenna.

Abstract: A spool and gear mechanism for tensioning and manipulating the steering/deflection control wires of a steerable catheter device provides for a desired level of tension that will allow operation of the device without too little or too much tension in those wires. In a wire-tensioning mechanism for a steerable catheter, the mechanism includes at least a first and second steering/deflection control wire each attached to the spool by winding around its own detent-engaged rotatable gear in the spool and extending out through a radial wall of the spool to engage into a steerable catheter body. In a multi-spool system, the wire-tensioning/winding gears of each spool preferably are accessible for adjustment via apertures of an adjacent spool.

Abstract: A steerable catheter includes a brake mechanism with a knob mounted to a catheter handle body. The knob is rotatable around a knob axis, and the catheter handle body includes at least one steering control spool rotatable around a spool axis that is orthogonal to the knob axis. The knob contacts and rotates in a limited arc along a recessed handle body surface between stop surfaces. A frictional braking element in mechanical communication, along the knob axis, with the knob is disposed adjacent the at least one steering control spool and actuatable into and out of contact with a contact surface of the at least one spool upon rotation of the knob around the knob axis.

Abstract: A spool and gear mechanism for tensioning and manipulating the steering/deflection control wires of a steerable catheter device provides for a desired level of tension that will allow operation of the device without too little or too much tension in those wires. In a wire-tensioning mechanism for a steerable catheter, the mechanism includes at least a first and second steering/deflection control wire each attached to the spool by winding around its own detent-engaged rotatable gear in the spool and extending out through a radial wall of the spool to engage into a steerable catheter body. In a multi-spool system, the wire-tensioning/winding gears of each spool preferably are accessible for adjustment via apertures of an adjacent spool.