# US 2026/0127474 A1 · Detectors, optical switches, and waveguides

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- Number: US 2026/0127474 A1
- Document ID: US20260127474A1
- Status: Published application
- Kind: A1
- Application number: 18/957,180
- Filed: 2024-11-22
- Published: 2026-05-07
- Earliest claimed: 2022-03-16
- Assignees: Quantum Source Labs Ltd.; Yeda Research and Development Co. Ltd.
- Applicants: Quantum Source Labs Ltd.; Yeda Research and Development Co. Ltd.
- Inventors: Gil SEMO; Ziv AQUA; Oded MELAMED; Dan CHARASH; Serge ROSENBLUM; Barak DAYAN
- Web page: https://patentgrep.com/patent/US20260127474A1

## CPC

- G06N 10/40: Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control
- G02F 1/3131: {in optical fibres}
- G21K 1/30: for confining neutral particles or handling confined neutral particles, e.g. atom traps
- H01S 3/042: for solid state lasers {(H01S3/0401 takes precedence)}
- G06N: COMPUTING ARRANGEMENTS BASED ON SPECIFIC COMPUTATIONAL MODELS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G21K: HANDLING OF PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- H01S: DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL

## Abstract

A quantum computing system, method and computer readable medium involve a vacuum enclosure for sustaining a vacuum below 10−3 millibar, an optical resonator tuned to a resonance of an atom, and a trapping laser for maintaining the atom within a mode of the optical resonator. An atom excitation laser induces emissions of photons, at least one of a plurality of waveguides couples the photons to or from the optical resonator, and a detector associated with at least one of the plurality of waveguides detects at least some of the emitted photons. A processor controls optical switches for switching between two or more of the plurality of waveguides.

## Claims

### Claim at position 1

1-60. (canceled)

### Claim 61

A quantum computing system, comprising:
a vacuum enclosure configured to sustain a vacuum below 10−3 millibar;
at least one optical resonator tuned to a resonance of an atom;
at least one trapping laser for maintaining the atom within a mode of the at least one optical resonator;
an atom excitation laser for inducing emissions of photons;
a plurality of waveguides, wherein at least one of the plurality of waveguides is configured to couple the photons to or from the at least one optical resonator;
at least one detector associated with at least one of the plurality of waveguides and configured to detect at least some of the emitted photons;
a plurality of optical switches for switching between at least two of the plurality of waveguides; and
at least one processor configured to:
control the plurality of optical switches to thereby select at least one of the plurality of waveguides for carrying at least one photon.

### Claim 62 (depends on 61)

The system of claim 61, wherein the at least one processor is configured to control the plurality of optical switches to selectively associate between at least two of the plurality of waveguides coupled to an atom-coupled optical resonator.

### Claim 63

(canceled)

### Claim 64 (depends on 61)

The system of claim 61, wherein the at least one optical resonator is implemented with a Photonic Integrated Circuit (PIC).

### Claim 65 (depends on 61)

The system of claim 61, wherein the plurality of waveguides is implemented with Silicon Nitride (SIN).

### Claim 66 (depends on 61)

The system of claim 61, wherein the plurality of waveguides includes a free space or an optical fiber.

### Claim 67

(canceled)

### Claim 68 (depends on 61)

The system of claim 61, wherein the atom includes a rubidium atom or a cesium atom.

### Claim 69

(canceled)

### Claim 70 (depends on 61)

The system of claim 61, wherein the plurality of optical switches is controlled to switch between the at least two of the plurality of waveguides at a time resolution of less than 1 microsecond.

### Claim 71 (depends on 61)

The system of claim 61, wherein at least one of the plurality of waveguides includes at least one photonic delay line configured to synchronize between photonic processing stages, the at least one photonic delay line located downstream of the at least one optical resonator.

### Claim 72 (depends on 71)

The system of claim 71, wherein the at least one processor is configured to control at least one of the plurality of optical switches to selectively associate between at least one of the plurality of waveguides coupled to an atom-coupled optical resonator and the at least one photonic delay line, thereby controlling passage of at least one photon through the at least one photonic delay line.

### Claim 73

A quantum computing method, comprising
sustaining a vacuum below 10−3 millibar;
tuning at least one optical resonator to a resonance of an atom;
maintaining the atom within a mode of the at least one optical resonator using at least one trapping laser;
inducing emissions of photons using an atom excitation laser;
detecting at least some of the emitted photons using at least one detector associated with at least one of a plurality of waveguides;
and
controlling a plurality of optical switches to thereby select at least one of the plurality of waveguides for carrying at least one photon.

### Claim 74 (depends on 73)

The method of claim 73, wherein the controlling a plurality of optical switches includes controlling to selectively associate between at least two waveguides coupled to an atom-coupled optical resonator.

### Claim 75

(canceled)

### Claim 76 (depends on 73)

The method of claim 73, wherein the atom includes a rubidium atom or a cesium atom.

### Claim 77 (depends on 73)

The method of claim 73, wherein the controlling of the plurality of optical switches includes controlling to switch between at least two of the plurality of waveguides at a time resolution of less than 1 microsecond.

### Claim 78 (depends on 73)

The method of claim 73, further comprising synchronizing between photonic processing stages using at least one photonic delay line located downstream of the at least one optical resonator.

### Claim 79 (depends on 78)

The method of claim 78, wherein the controlling a plurality of optical switches include controlling to selectively associate between at least one of the plurality of waveguides coupled to an atom-coupled optical resonator and the at least one photonic delay line, thereby controlling passage of at least one photon through the at least one photonic delay line.

### Claim 80

A non-transitory computer-readable storage medium including instructions that, when executed by at least one processor, cause the at least one processor to carry out a quantum computing method, the method comprising:
sustaining a vacuum below 10−3 millibar;
tuning at least one optical resonator to a resonance of an atom;
maintaining the atom within a mode of the at least one optical resonator using at least one trapping laser;
inducing emissions of photons using an atom excitation laser;
detecting at least some of the emitted photons using at least one detector associated with at least one of a plurality of waveguides;
and
controlling a plurality of optical switches to thereby select at least one of the plurality of waveguides for carrying at least one photon.

### Claim 81 (depends on 61)

The system of claim 61, wherein the at least one optical resonator includes a whispering gallery mode cavity or a Fabry-Pérot cavity.

### Claim 82 (depends on 61)

The system of claim 61, wherein the at least one trapping laser is configured to generate a magneto-optical trap.

### Claim 83 (depends on 61)

The system of claim 61, wherein the at least one trapping laser include at least one red detuned laser and at least one blue detuned laser.

### Claim 84 (depends on 61)

The system of claim 61, wherein the at least one processor is configured to perform a computation or an operation based at least in part on an output of the at least one detector.

### Claim 85 (depends on 73)

The method of claim 73, wherein the at least one trapping laser is configured to generate a magneto-optical trap.

### Claim 86 (depends on 73)

The method of claim 73, further comprising performing a computation or an operation based at least in part on an output of the at least one detector.