BACKGROUND OF THE DISCLOSURE

Aspects of the present disclosure generally relate to quantum information processing systems, and more specifically, cryogenic trapped-ion system for large scale quantum operations, including large scale quantum simulation.

Trapped atomic ions is one of the quantum information processing (QIP) approaches that has delivered universal and fully programmable machines. Trapped atomic ions are also a leading platform for quantum information networks (QINs), in which long-lived identical qubit memories can be locally entangled through their Coulomb interaction and remotely entangled through photonic channels. Systems based on trapped atomic ions that operate at room temperature can face collisions between residual background molecules or atoms and the trapped atomic ions, and these collision can result in the crystal or lattice with the trapped atomic ions melting, which may require constant and/or fast recoveries to continue operation, if such recoveries are possible.

Accordingly, systems based on trapped atomic ions that can reduce the pressure caused by residual background molecules or atoms are desirable to improve the overall performance of such systems.

SUMMARY OF THE DISCLOSURE

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In an aspect of the present disclosure, a method for operating a trapped-ion system is described that includes bringing a chain of ions in a trap at a cryogenic temperature, the trap being a micro-fabricated trap, and performing quantum computations, simulations, or both using the chain of ions in the trap at the cryogenic temperature. The trap can include at least 30 ions, for example.

In another aspect of the present disclosure, a method for performing a pressure measurement in a cryogenic trapped-ion system is described that includes establishing a zig-zag ion chain in the cryogenic trapped-ion system, detecting a change in a configuration of the zig-zag ion chain, and determining a measurement of the pressure based on the detection in the change in configuration.

In another aspect of the present disclosure, a method to compensate for low frequency vibrations in a quantum information processing (QIP) system is described that includes measuring a low frequency vibration, generating a control signal based on the measurement to adjust one or more optical components, and controlling the one or more optical components using the control signal.

In another aspect of this disclosure, a quantum information processing (QIP) system for operating a trapped-ion system is described that includes means for bringing a chain of ions in a trap at a cryogenic temperature, the trap being a micro-fabricated trap and the chain of ions having at least 30 ions, and means performing one or both of a quantum computation or a quantum simulation using the chain of ions in the trap at the cryogenic temperature.

In another aspect of this disclosure, a QIP system for performing a pressure measurement in a cryogenic trapped-ion system is described that includes means for establishing a zig-zag ion chain in the cryogenic trapped-ion system, means for detecting a change in a configuration of the zig-zag ion chain, and means for determining a measurement of the pressure based on the detection in the change in configuration.

In another aspect of this disclosure, a QIP system to compensate for low frequency vibrations in the QIP system is described that includes means for measuring a low frequency vibration, means for generating a control signal based on the measurement to adjust one or more optical components, and means for controlling an operation of the one or more optical components using the control signal.

In another aspect of this disclosure, a computer-readable medium storing code with instructions executable by a processor for operating a trapped-ion system is described that includes code for bringing a chain of ions in a trap at a cryogenic temperature, the trap being a micro-fabricated trap and the chain of ions having at least 30 ions, and code for performing one or both of a quantum computation or a quantum simulation using the chain of ions in the trap at the cryogenic temperature.

In another aspect of this disclosure, a computer-readable medium storing code with instructions executable by a processor for performing a pressure measurement in a cryogenic trapped-ion system is described that includes code for establishing a zig-zag ion chain in the cryogenic trapped-ion system, code for detecting a change in a configuration of the zig-zag ion chain, and code for determining a measurement of the pressure based on the detection in the change in configuration.

In another aspect of this disclosure, a computer-readable medium storing code with instructions executable by a processor to compensate for low frequency vibrations in a QIP system is described that includes code for measuring a low frequency vibration; code for generating a control signal based on the measurement to adjust one or more optical components, and code for controlling an operation of the one or more optical components using the control signal.

