Compact RF driver for Paul traps used in quantum computers and methods of making and using same

Patent metadata

Field	Value
Publication number	US-10496932-B2
Application number	US-201816039186-A
Country	US
Kind code	B2
Filing date	Jul 18, 2018
Priority date	Jul 18, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

Aspects of the present disclosure describe a compact RF driver circuit for Paul traps in trapped ion quantum computers and methods, and structures including same.

First claim

The invention claimed is:

1. A compact RF driver circuit for a Paul trap in a trapped ion quantum computer system comprising:
the trapped ion quantum computer system including
the compact RF driver circuit having

an inductive-capacitive tank circuit;
an unmatched, low-output-impedance amplifier (<4 Ω) that electrically drives the tank circuit; and
the Paul trap electrically connected to an output of the tank circuit.

2. The driver circuit for the quantum computer Paul trap of claim 1 wherein the amplifier exhibits an output impedance of 1 ohm or less.

3. The driver circuit for the quantum computer Paul trap of claim 1 wherein the circuit is operated under cryogenic conditions.

4. The driver circuit for the quantum computer Paul trap of claim 3 wherein the tank circuit includes a superconducting inductor and the Paul trap is driven at a trap frequency >10 MHz.

5. The driver circuit for the quantum computer Paul trap of claim 1 configured such that it does not include a tuning circuit.

6. The driver circuit for the quantum computer Paul trap of claim 1 configured such that it does not include a helical resonator.

7. A method of operating a Paul trap in a trapped ion quantum computer, said method comprising:
providing a quantum computer system including:
a compact RF driver circuit having
an inductive-capacitive tank circuit;
an unmatched, low-output-impedance amplifier (<4 ohm) electrically connected to the tank circuit;

providing a load to the driver circuit, said load comprising the Paul trap; and
operating the driver circuit such that the Paul trap is operational to trap sample ions.

8. The method of claim 7 wherein the unmatched, low-output-impedance amplifier exhibits an output impedance of 1 ohm or less.

9. The method of claim 7 further comprising providing cryogenic conditions for the Paul trap and the driver circuit.

10. The method of claim 7 wherein the tank circuit includes a superconducting inductor.

11. The method of claim 10 wherein the Paul trap is driven at a frequency >10 MHz.

12. The method of claim 10 wherein the Paul trap is driven at a frequency from 30 MHz to 500 MHz.

13. The method of claim 7 wherein the quantum computer system does not include a helical resonator.

14. The method of claim 7 wherein the driver circuit does not include a tuning circuit.

Assignees

• Univ Duke

Inventors

• Kim Jungsang
• Vrijsen Geert
• Spivey Robert

Classifications

• H01J49/4225

  Multipole linear ion traps, e.g. quadrupoles, hexapoles · CPC title

• H03H7/38

  Impedance-matching networks · CPC title

• H03K3/38 Primary

  by the use, as active elements, of superconductive devices · CPC title

• G06N10/00 Primary

  Quantum computing, i.e. information processing based on quantum-mechanical phenomena · CPC title