Abstract: A controller of a quantum system causes a dressing field circuit to generate a dressing field at a target location where one or more target qubits are located. The dressing field modifies a set of initial states into a set of superposition states. A first (second) dressed state of the set of superposition states includes a non-zero contribution from a first (second) qubit state of the set of initial states. A dressed frequency difference between the first and second dressed states and a qubit frequency difference between the first and second qubit states are different. The dressing field is configured to generate first and second dressed states having a desired level of sensitivity (e.g., energy/frequency dependence) on the component of the external magnetic field that is in the quantization direction of the quantum system.

Abstract: A method for laser cooling an object crystal comprising at least two atomic objects and confined by a confinement apparatus is provided. A controller controls one or more manipulation sources to cause a first instance of manipulation signals to be incident on the object crystal at a target location defined at least in part by the confinement apparatus. The manipulation signals are configured to laser cool a first motional mode of the object crystal. The controller causes an adiabatic transfer of phonons from a second motional mode of the object crystal to the first motional mode of the object crystal. The controller controls the one or more manipulation sources to cause a second instance of the manipulation signals to be incident on the object crystal at the target location. The manipulation signals are configured to laser cool the first motional mode of the object crystal.

Abstract: An atomic object confinement apparatus comprising a plurality of electrodes and one or more quasi-direct-current (quasi-DC) circuits. The plurality of electrodes comprise a plurality of radio frequency (RF) rail electrodes arranged to define, at least in part, a periodic array of confinement segments. The plurality of RF rail electrodes are configured such that, when an oscillating voltage signal is applied thereto, the plurality of RF rail electrodes generate a pseudopotential in a form of an array of trapping regions configured to contain at least one atomic object within a respective trapping region of the array of trapping regions. The one or more quasi-direct-current (quasi-DC) circuits are arranged to generate a magnetic field having a selectable magnitude and a selectable direction, such that the generated magnetic field acts on at least one atomic object within the array of trapping regions.

Abstract: A controller of a quantum system causes a geometric phase gate to be performed on two or more qubits by causing two or more qubits of the quantum system to experience a (near field and/or non-radiating) magnetic field gradient; and, responsive to determining that a gate time period has elapsed since the two or more qubits of the quantum system started to experience the magnetic field gradient, causing the two or more qubits to no longer experience the magnetic field gradient. The entanglement of the two or more qubits corresponding to the performance of the gate is enacted, mediated, and/or caused by the magnetic field gradient.

Abstract: A trapped-ion quantum logic gate and a method of operating the trapped-ion quantum logic gate are provided. The trapped-ion quantum logic gate includes at least one ion having two internal states and forming a qubit having a qubit transition frequency ?0, a magnetic field gradient, and two microwave fields. Each of the two microwave fields has a respective frequency that is detuned from the qubit transition frequency ?0 by frequency difference ?. The at least one ion has a Rabi frequency ?? due to the two microwave fields and a Rabi frequency ?g due to the magnetic field gradient. The method includes applying the magnetic field gradient and the two microwave fields to the at least one ion such that a quantity ?g/? is in a range between zero and 5×10?2.

Abstract: A trapped-ion quantum logic gate and a method of operating the trapped-ion quantum logic gate are provided. The trapped-ion quantum logic gate includes at least one ion having two internal states and forming a qubit having a qubit transition frequency ?0, a magnetic field gradient, and two microwave fields. Each of the two microwave fields has a respective frequency that is detuned from the qubit transition frequency ?0 by frequency difference ?. The at least one ion has a Rabi frequency ?? due to the two microwave fields and a Rabi frequency ?g due to the magnetic field gradient. The method includes applying the magnetic field gradient and the two microwave fields to the at least one ion such that a quantity ?g/? is in a range between zero and 5×10?2.

Abstract: A stringer assembly for mounting to steps of a stairway, comprises first and second stringer members. The first stringer member are adapted to be secured to the steps with first fasteners that are driven through the first stringer member and then into the steps. The second stringer member is adapted to be positioned with respect to the first stringer member such as to conceal the first fastener and to be mounted thereto via second fasteners and glue, wherein the second fasteners are adapted to be driven through the first stringer member and then into the second stringer member. Decorative covers are provided for mounting onto exposed edges of the first and second stringer members. A method for assembling a stringer to steps of a stairway and a kit for producing a stringer assembly for use in stairways are also disclosed.

Abstract: A stringer assembly for mounting to steps of a stairway, comprises first and second stringer members. The first stringer member are adapted to be secured to the steps with first fasteners that are driven through the first stringer member and then into the steps. The second stringer member is adapted to be positioned with respect to the first stringer member such as to conceal the first fastener and to be mounted thereto via second fasteners and glue, wherein the second fasteners are adapted to be driven through the first stringer member and then into the second stringer member. Decorative covers are provided for mounting onto exposed edges of the first and second stringer members. A method for assembling a stringer to steps of a stairway and a kit for producing a stringer assembly for use in stairways are also disclosed.