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New Amplifier Design Promises Less Noise, More Gain for Quantum Computers

RIKEN researchers have unveiled a new Josephson traveling‑wave parametric amplifier (JTWPA) that cuts added noise to 0.68 quanta, just 0.18 above the quantum limit, while delivering high gain. The device replaces lossy dielectric with a spiraled, fish‑bone‑like tapered waveguide, simplifying fabrication for labs already producing superconducting qubits. Demonstrated experimentally, the amplifier supports fast, single‑shot readout across multiple frequencies, a key requirement for scaling superconducting processors toward the 100‑qubit regime. The findings appear in Physical Review Applied.

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Phys.org (Quantum Physics News)

Recent Posts

New Amplifier Design Promises Less Noise, More Gain for Quantum Computers

Silicon Quantum Processor Detects Single-Qubit Errors While Preserving Entanglement

Optical Switch Protocol Verifies Entangled Quantum States in Real Time without Destroying Them

Using Light to Probe Fractional Charges in a Fractional Chern Insulator

Quantum Research in Two Ways: From Proving Someone's Location to Simulating Financial Markets

Time Crystals Could Become Accurate and Efficient Timekeepers

Cutting Down on Quantum-Dot Crosstalk: Precise Measurements Expose a New Challenge

Physicists Develop New Protocol for Building Photonic Graph States

Rolling Out the Carpet for Spin Qubits with New Chip Architecture

Majorana Qubits Become Readable as Quantum Capacitance Detects Even-Odd States

Current Flows without Heat Loss in Newly Engineered Fractional Quantum Material

Machine Learning Reveals Hidden Landscape of Robust Information Storage

Laser‑written Glass Chip Pushes Quantum Communication Toward Practical Deployment

Quantum Encryption Method Demonstrated at City-Sized Distances for the First Time

Three-Way Quantum Correlations Fade Exponentially with Distance at Any Temperature, Study Shows

Study Reveals Microscopic Origins of Surface Noise Limiting Diamond Quantum Sensors

Tuning Topological Superconductors Into Existence by Adjusting the Ratio of Two Elements

Electron-Phonon 'Surfing' Could Help Stabilize Quantum Hardware, Nanowire Tests Suggest

Ultra-Thin Metasurface Can Generate and Direct Quantum Entanglement

Niobium's Superconducting Switch Cuts Near-Field Radiative Heat Transfer 20-Fold

Using Duality to Construct and Classify New Quantum Phases

91-Qubit Processor Accurately Simulates Many-Body Quantum Chaos

Collaboration of Elementary Particles: How Teamwork Among Photon Pairs Overcomes Quantum Errors

AI Makes Quantum Field Theories Computable

Superconducting Nanowire Memory Array Achieves Significantly Lower Error Rate

Particle Permutation Task Can Be Tackled by Quantum but Not Classical Computers, Study Finds

Entangled Atomic Clouds Enable More Precise Quantum Measurements

3D-Printed Surfaces Help Atoms Play Ball to Improve Quantum Sensors

Magnetic 'Sweet Spots' Enable Optimal Operation of Hole Spin Qubits

Technology Pulse

Phys.org (Quantum Physics News)

Recent Posts

New Amplifier Design Promises Less Noise, More Gain for Quantum Computers

Silicon Quantum Processor Detects Single-Qubit Errors While Preserving Entanglement

Optical Switch Protocol Verifies Entangled Quantum States in Real Time without Destroying Them

Using Light to Probe Fractional Charges in a Fractional Chern Insulator

Quantum Research in Two Ways: From Proving Someone's Location to Simulating Financial Markets

Time Crystals Could Become Accurate and Efficient Timekeepers

Cutting Down on Quantum-Dot Crosstalk: Precise Measurements Expose a New Challenge

Physicists Develop New Protocol for Building Photonic Graph States

Rolling Out the Carpet for Spin Qubits with New Chip Architecture

Majorana Qubits Become Readable as Quantum Capacitance Detects Even-Odd States

Current Flows without Heat Loss in Newly Engineered Fractional Quantum Material

Machine Learning Reveals Hidden Landscape of Robust Information Storage

Laser‑written Glass Chip Pushes Quantum Communication Toward Practical Deployment

Quantum Encryption Method Demonstrated at City-Sized Distances for the First Time

Three-Way Quantum Correlations Fade Exponentially with Distance at Any Temperature, Study Shows

Study Reveals Microscopic Origins of Surface Noise Limiting Diamond Quantum Sensors

Tuning Topological Superconductors Into Existence by Adjusting the Ratio of Two Elements

Electron-Phonon 'Surfing' Could Help Stabilize Quantum Hardware, Nanowire Tests Suggest

Ultra-Thin Metasurface Can Generate and Direct Quantum Entanglement

Niobium's Superconducting Switch Cuts Near-Field Radiative Heat Transfer 20-Fold

Using Duality to Construct and Classify New Quantum Phases

91-Qubit Processor Accurately Simulates Many-Body Quantum Chaos

Collaboration of Elementary Particles: How Teamwork Among Photon Pairs Overcomes Quantum Errors

AI Makes Quantum Field Theories Computable

Superconducting Nanowire Memory Array Achieves Significantly Lower Error Rate

Particle Permutation Task Can Be Tackled by Quantum but Not Classical Computers, Study Finds

Entangled Atomic Clouds Enable More Precise Quantum Measurements

3D-Printed Surfaces Help Atoms Play Ball to Improve Quantum Sensors

Magnetic 'Sweet Spots' Enable Optimal Operation of Hole Spin Qubits