Periodic Reporting for period 2 - DARTWARS (Detector Array Readout with Traveling Wave AmplifieRS)
Période du rapport: 2023-10-01 au 2024-09-30
In the realm of quantum computing, where the potential of qubits holds immense promise, a critical challenge lies in efficiently handling their status with precision while minimizing added noise during the transmission and processing of quantum information.
During the project we have dedicated our efforts to the development of traveling wave parametric amplifiers (TWPAs)—a transformative technology poised to revolutionize the field of quantum information science.
The Challenge:
As quantum computers harness the potential of qubits for unparalleled processing capabilities, the need for effectively amplifying quantum signals becomes paramount.
Traditional amplification methods fall short when dealing with the delicate nature of quantum information, requiring a novel approach.
Breakthrough Achievement:
In the project, we demonstrated the use of a broadband TWPA amplifier for qubit readout.
This achievement led to a substantial improvement in the signal-to-noise ratio and an increase in readout fidelity.
Such progress is pivotal for reliable qubit measurements, addressing a fundamental requirement for scaling up quantum computing systems.
Significance for Society:
Imagine a future where quantum computation and communication are not merely theoretical concepts but tangible realities, enabling secure and ultra-fast computation and transmission of information.
The successful demonstration of high-fidelity qubit readout in the third year of the project holds profound implications for society (e.g. Enhanced Cybersecurity, Scientific Breakthroughs, Economic Growth, etc)
Objectives Aligned with Quantum Advancements:
The project has been driven by a visionary set of goals:
Optimize Quantum Signal Quality: Develop traveling wave parametric amplifiers specifically tailored for qubit signals, ensuring minimal added noise and interference while preserving delicate quantum states.
Enhance Quantum Bandwidth Efficiency: Address the unique demands of quantum information transmission by maximizing bandwidth, allowing seamless exchange of quantum states.
Facilitate Quantum Accessibility: Work towards democratizing quantum technologies, making advanced quantum communication accessible to a broader audience and fostering collaboration in the quantum computing community.
A Quantum-Connected Future:
The first two years of the project laid the groundwork for these advancements, culminating in the third year with the successful demonstration of TWPAs in qubit readout applications.
This milestone not only validates the effectiveness of TWPAs but also accelerates the timeline for practical quantum computing systems.
As this work continues to push technological boundaries, it brings us closer to a quantum-connected future where the transformative power of qubits shapes a more secure, innovative, and intelligent society.
During the project we have dedicated our efforts to the development of traveling wave parametric amplifiers (TWPAs)—a transformative technology poised to revolutionize the field of quantum information science.
The Challenge:
As quantum computers harness the potential of qubits for unparalleled processing capabilities, the need for effectively amplifying quantum signals becomes paramount.
Traditional amplification methods fall short when dealing with the delicate nature of quantum information, requiring a novel approach.
Breakthrough Achievement:
In the project, we demonstrated the use of a broadband TWPA amplifier for qubit readout.
This achievement led to a substantial improvement in the signal-to-noise ratio and an increase in readout fidelity.
Such progress is pivotal for reliable qubit measurements, addressing a fundamental requirement for scaling up quantum computing systems.
Significance for Society:
Imagine a future where quantum computation and communication are not merely theoretical concepts but tangible realities, enabling secure and ultra-fast computation and transmission of information.
The successful demonstration of high-fidelity qubit readout in the third year of the project holds profound implications for society (e.g. Enhanced Cybersecurity, Scientific Breakthroughs, Economic Growth, etc)
Objectives Aligned with Quantum Advancements:
The project has been driven by a visionary set of goals:
Optimize Quantum Signal Quality: Develop traveling wave parametric amplifiers specifically tailored for qubit signals, ensuring minimal added noise and interference while preserving delicate quantum states.
Enhance Quantum Bandwidth Efficiency: Address the unique demands of quantum information transmission by maximizing bandwidth, allowing seamless exchange of quantum states.
Facilitate Quantum Accessibility: Work towards democratizing quantum technologies, making advanced quantum communication accessible to a broader audience and fostering collaboration in the quantum computing community.
A Quantum-Connected Future:
The first two years of the project laid the groundwork for these advancements, culminating in the third year with the successful demonstration of TWPAs in qubit readout applications.
This milestone not only validates the effectiveness of TWPAs but also accelerates the timeline for practical quantum computing systems.
As this work continues to push technological boundaries, it brings us closer to a quantum-connected future where the transformative power of qubits shapes a more secure, innovative, and intelligent society.
Ultra-sensitive detection schemes at microwave frequencies play a central role in quantum computing and quantum sensing.
In many applications, the need to read a large array of devices (e.g. qubits, detectors, and cavities) calls for large-bandwidth amplifiers with the lowest possible noise.
A leading proposal for achieving broadband bandwidth and noise at the standard quantum limit is through the use of a traveling wave parametric amplifier (TWPA) such as the Josephson JTWPA or a kinetic inductance KI-TWPA.
KI-TWPAs, the focus of this project, offer several key advantages, including high dynamic range, resilience to high magnetic fields, the possibility of operation over a broad temperature range (from millikelvin to 4 K), and simple microfabrication, requiring only a few lithography and etching steps, without overlapping structures.
KI-TWPAs achieve amplification through wave-mixing processes induced by the film’s intrinsic nonlinear superconducting kinetic inductance.
When a strong pump current propagates with a weak signal current along a line, energy is transferred from the pump to the signal, achieving parametric amplification.
Despite these promising results, the developed device still requires a relatively high pump power to reach maximum gain.
The pump must be isolated from the device under test by components that unavoidably insert loss, thereby degrading the noise performance of the chain.
An amplifier functioning with lower pump power may necessitate fewer of these isolating components and may improve read-out performance.
One solution to overcome this problem is to use thinner superconducting films. In fact, decreasing the thickness of the film increases both the kinetic inductance and the inductive non-linearity.
In the first two years of the project, we developed the KI-TWPA amplifier, utilizing high kinetic inductance and featuring an innovative geometry based on an inverted microstrip transmission line.
In the final year of the project we refined the KI-TWPA amplifier design developed in the firt two years. The amplifier exhibited performance improvements over the amplifiers developed during the first two years, achieving higher gain, broader bandwidth, and noise levels at the Standard Quantum Limit (SQL).
The developed amplifier was utilized to read out an array of eight qubits, created under a separate project, achieving a maximum improvement in the qubit state measurement signal-to-noise ratio (SNR) and in readout fidelity.
Such advancements are crucial for the development of reliable quantum computing systems, which have the potential to revolutionize society by enabling breakthroughs in fields like cryptography, material science, drug discovery, and complex system optimization.
In many applications, the need to read a large array of devices (e.g. qubits, detectors, and cavities) calls for large-bandwidth amplifiers with the lowest possible noise.
A leading proposal for achieving broadband bandwidth and noise at the standard quantum limit is through the use of a traveling wave parametric amplifier (TWPA) such as the Josephson JTWPA or a kinetic inductance KI-TWPA.
KI-TWPAs, the focus of this project, offer several key advantages, including high dynamic range, resilience to high magnetic fields, the possibility of operation over a broad temperature range (from millikelvin to 4 K), and simple microfabrication, requiring only a few lithography and etching steps, without overlapping structures.
KI-TWPAs achieve amplification through wave-mixing processes induced by the film’s intrinsic nonlinear superconducting kinetic inductance.
When a strong pump current propagates with a weak signal current along a line, energy is transferred from the pump to the signal, achieving parametric amplification.
Despite these promising results, the developed device still requires a relatively high pump power to reach maximum gain.
The pump must be isolated from the device under test by components that unavoidably insert loss, thereby degrading the noise performance of the chain.
An amplifier functioning with lower pump power may necessitate fewer of these isolating components and may improve read-out performance.
One solution to overcome this problem is to use thinner superconducting films. In fact, decreasing the thickness of the film increases both the kinetic inductance and the inductive non-linearity.
In the first two years of the project, we developed the KI-TWPA amplifier, utilizing high kinetic inductance and featuring an innovative geometry based on an inverted microstrip transmission line.
In the final year of the project we refined the KI-TWPA amplifier design developed in the firt two years. The amplifier exhibited performance improvements over the amplifiers developed during the first two years, achieving higher gain, broader bandwidth, and noise levels at the Standard Quantum Limit (SQL).
The developed amplifier was utilized to read out an array of eight qubits, created under a separate project, achieving a maximum improvement in the qubit state measurement signal-to-noise ratio (SNR) and in readout fidelity.
Such advancements are crucial for the development of reliable quantum computing systems, which have the potential to revolutionize society by enabling breakthroughs in fields like cryptography, material science, drug discovery, and complex system optimization.
One of the primary objectives of European policy is to promote scientific and technological progress.
During this initial phase, the DARTWARS project contributed to this mission by advancing the fields in which superconducting circuits are utilized, with potential impacts on practical applications.
These impacts extend beyond fundamental physics research to areas such as quantum computing and quantum communications.
The increasing demand for quantum computing hardware stands to greatly benefit from the performance of the developed TWPA amplifiers developed within the DARTWARS project.
The amplifier's capabilities also promise unprecedented precision and sensitivity in Quantum Sensing and Metrology and Information.
The advancements in TWPA amplifiers and related technologies can contribute to the growth and success of companies and startups by enabling them to stay at the forefront of innovation and meet the evolving demands of the market.
Startups involved in quantum computing, communication, sensing, and metrology can leverage the improved technologies to develop more efficient and reliable solutions for their applications.
Furthermore, collaborations with academic institutions and researchers involved in this activity can provide startups with valuable insights, expertise, and resources to accelerate their product development and commercialization efforts.
The social impact of advancements in quantum technology extends far beyond the realm of science and technology, potentially shaping the future of society by addressing critical challenges and unlocking new opportunities for progress and prosperity.
During this initial phase, the DARTWARS project contributed to this mission by advancing the fields in which superconducting circuits are utilized, with potential impacts on practical applications.
These impacts extend beyond fundamental physics research to areas such as quantum computing and quantum communications.
The increasing demand for quantum computing hardware stands to greatly benefit from the performance of the developed TWPA amplifiers developed within the DARTWARS project.
The amplifier's capabilities also promise unprecedented precision and sensitivity in Quantum Sensing and Metrology and Information.
The advancements in TWPA amplifiers and related technologies can contribute to the growth and success of companies and startups by enabling them to stay at the forefront of innovation and meet the evolving demands of the market.
Startups involved in quantum computing, communication, sensing, and metrology can leverage the improved technologies to develop more efficient and reliable solutions for their applications.
Furthermore, collaborations with academic institutions and researchers involved in this activity can provide startups with valuable insights, expertise, and resources to accelerate their product development and commercialization efforts.
The social impact of advancements in quantum technology extends far beyond the realm of science and technology, potentially shaping the future of society by addressing critical challenges and unlocking new opportunities for progress and prosperity.