A5011933398- Quantum Information and Cryptography
- Quantum Computing Algorithms and Architecture
- Quantum and electron transport phenomena
- Photopolymerization techniques and applications
- Synthesis and properties of polymers
- Physics of Superconductivity and Magnetism
- Advancements in Photolithography Techniques
- Silicone and Siloxane Chemistry
- Advanced MEMS and NEMS Technologies
- Nanofabrication and Lithography Techniques
- Geophysics and Sensor Technology
- Photonic and Optical Devices
- Semiconductor Quantum Structures and Devices
- Corrosion Behavior and Inhibition
- 3D IC and TSV technologies
- Hydrogen embrittlement and corrosion behaviors in metals
- Quantum-Dot Cellular Automata
- Copper Interconnects and Reliability
- Microstructure and Mechanical Properties of Steels
- Semiconductor Lasers and Optical Devices
- Advanced Semiconductor Detectors and Materials
- Advanced Welding Techniques Analysis
- Surface Modification and Superhydrophobicity
- Additive Manufacturing and 3D Printing Technologies
- Color Science and Applications
Yale University
2022-2025
University of Oxford
2017-2022
Akebono (Japan)
2009-2018
Gunma University
2014-2016
Chiba University
1971-2004
Screen
1991
Anna Needs Neuroblastoma Answers
1981
A SNAIL-based coupler is used to devise a programmable beam splitter interaction between two bosonic modes with over an octave separation in frequency; the method further applied as primitive for constructing two-qubit gates.
Quantum error mitigation (QEM) is vital for noisy intermediate-scale quantum (NISQ) devices. While most conventional QEM schemes assume discrete gate-based circuits with noise appearing either before or after each gate, the assumptions are inappropriate describing realistic that may have strong gate-dependence and complicated nonlocal effects, general computing models such as analog simulators. To address these challenges, we first extend scenario, where computation process, being digital...
Quantum computation requires the precise control of evolution a quantum system, typically through application discrete logic gates on set qubits. Here, we use cross-resonance interaction to implement gate between two superconducting transmon qubits with direct static dispersive coupling. We demonstrate practical calibration procedure for optimization gate, combining continuous and repeated-gate Hamiltonian tomography step-wise reduction dominant two-qubit coherent errors mapping microwave...
The design of quantum hardware that reduces and mitigates errors is essential for practical error correction (QEC) useful computation. To this end, we introduce the circuit-Quantum Electrodynamics (QED) dual-rail qubit in which our physical encoded single-photon subspace, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:mrow> <mml:mo stretchy="false">{</mml:mo> <mml:mo>|</mml:mo> <mml:mn>01</mml:mn> <mml:mo>〉</mml:mo> <mml:mo>,</mml:mo>...
We report high qubit coherence as well low cross-talk and single-qubit gate errors in a superconducting circuit architecture that promises to be tileable two-dimensional (2D) lattices of qubits. The integrates an inductively shunted cavity enclosure into design featuring nongalvanic out-of-plane control wiring qubits resonators fabricated on opposing sides substrate. proof-of-principle device features four uncoupled transmon exhibits average energy relaxation times T1 = 149(38) μs, pure...
Bosonic quantum error correction has proven to be a successful approach for extending the coherence of memories, but execute deep circuits, high-fidelity gates between encoded qubits are needed. To that end, we present family error-detectable two-qubit variety bosonic encodings. From new geometric framework based on "Bloch sphere" operators, construct ZZL(θ) and exponential-swap(θ) binomial, four-legged cat, dual-rail, several other codes. The gate Hamiltonian is simple engineer, requiring...
Quantum control of a linear oscillator using static dispersive coupling to nonlinear ancilla underpins wide variety experiments in circuit QED. Extending this more than one while minimizing the required connectivity would enable hardware-efficient multi-mode entanglement and measurements. We show that spectrum an statically coupled single mode can be made depend on joint photon number two modes by applying strong parametric beamsplitter between them. This 'joint-photon number-splitting'...
Superconducting circuits are well established as a strong candidate platform for the development of quantum computing. In order to advance practically useful level, architectures needed which combine arrays many qubits with selective qubit control and readout, without compromising on coherence. Here, we present coaxial circuit electrodynamics architecture in resonator fabricated opposing sides single chip, readout wiring provided by running perpendicular chip plane. We characterization...
A critical challenge in developing scalable error-corrected quantum systems is the accumulation of errors while performing operations and measurements. One promising approach to design a system where can be detected converted into erasures. Such utilizing erasure qubits are known have relaxed requirements for error correction. recent proposal aims do this using dual-rail encoding with superconducting cavities. However, experimental characterization demonstration cavity qubit has not yet been...
Quantum computing with discrete variable (DV, qubit) hardware is approaching the large scales necessary for computations beyond reach of classical computers. However, important use cases such as quantum simulations physical models containing bosonic modes, and error correction are challenging DV-only systems. Separately, native continuous-variable (CV, oscillator) systems has received attention an alternative approach, yet universal control non-trivial. In this work, we show that hybrid...
It has been reported that some diazonium compounds make polyvinyl alcohol insoluble to water under ultraviolet irradiation. We found tetrazonium salts have even stronger light-hardening effects on than salts. studied by means of infrared spectra sensitive films consisting and o-dianisidinetetrazonium chloride-zinc chloride double After exposure the film rays, new absorption appeared at 1250 1030 cm.-1 bands; these absorptions were considered be asymmetric ν(COC) symmetric ν(COC),...
Abstract A new photoresist composed of cyclized cis‐1, 4‐polybutadiene has been developed. The resist much higher sensitivity on exposure to ultraviolet light than the conventional from polyisoprene. This no resist‐flow even at 250°C, and provides high resolution baking 200°C. Thermogravimetric analysis showed that polybutadiene decomposes temperature
The design of quantum hardware that reduces and mitigates errors is essential for practical error correction (QEC) useful computation. To this end, we introduce the circuit-Quantum Electrodynamics (QED) dual-rail qubit in which our physical encoded single-photon subspace two superconducting microwave cavities. dominant photon loss can be detected converted into erasure errors, are general much easier to correct. In contrast linear optics, a circuit-QED implementation code offers unique...
フェニルアジドの置換基と感光性との関係を見る目的で一置換フェニルアジドを系統的に20種類合成した。電子スペクトルを測定した結果,フェニルアジドではメタノール溶液中で285.7,277.5,249.5,208.Omμ に吸収ピークを持ち,他のアジド化合物ではニトロ基とP位にジメチル基とジエチル基を導入したものを除いてほとんどフェニルアジドと同様のスペクトルを示す。これら化合物のメタノール希薄溶液中での光分解量子収率を真空熱電対と各吸収ピークに対応する単色光を用いて測定した。量子収率の値は0.2～1.0の範囲にあり,フェニルアジドでは286,278,250mμ でそれぞれ0.76,0.73,1.0であり,長波長側二つのピークでの値の方が短波長側での値より小さいことがわかった。同様の結果が他のアジド化合物についても得られる。これらの結果から置換基が感光性に与える影響は小さいことが考えられる。また溶媒が電子スペクトルに与える影響とHucke1近似の分子軌道法から各吸収ピークに対応する電子遷移の性質についても検討した。
Abstract v ( N ) band of the diazo or tetrazonium salt, derived from p ‐methoxyaniline, ‐hydroxyaniline, benzidine, o ‐dianisidine shows perpendicular dicroism in stretched poly(vinyl alcohol) film. This means that these salts are directing their longer axes perpendicularly to direction stretching. However, diazonium salt ‐aminodiphenyl ‐anisidine no dichroism. From above facts, it is concluded interactions between polar groups and those on both ends such as diazo, methoxy, hydroxy group...
We consider the problem of selectively controlling couplings in a practical quantum processor with always-on interactions that are diagonal computational basis, using sequences local not gates. This methodology is well known nuclear magnetic resonance implementations, but previous approaches do scale efficiently for general fully connected Hamiltonian, where complexity finding time-optimal solutions makes them only up to few tens qubits. Given rapid growth number qubits cutting-edge...
A powerful control method in experimental quantum computing is the use of spin echoes, employed to select a desired term system's internal Hamiltonian, while refocusing others. Here, we address more general problem, describing not only turn on and off particular interactions but also rescale their strengths so that can generate any effective Hamiltonian. We propose an algorithm based linear programming for achieving time-optimal rescaling solutions fully coupled systems tens qubits, which be...
Josephson parametric amplification is a tool of paramount importance in circuit-QED especially for the quantum-noise-limited single-shot read-out superconducting qubits. We developed amplifier (JPA) based on lumped-element LC resonator, which inductance L composed by geometric and an array 4 quantum interference devices (SQUIDs). characterized main figures merit device, obtaining −3 dB bandwidth BW = 15 MHz gain G 21 1 compression point P 1dB −115 dBm. The obtained results are promising...
Two kinds of new Fe-Cr system brazing filler metal, Fe-20Cr-43Ni-10P and Fe-20Cr-20Ni-8.0P-5.0Si-2.0Mo, were developed as a substitute for an expensive Ni-based metal in SUS304 stainless steel. Corrosion resistance the joints brazed with metals investigated compared joint conventional metal. Microstructures fillet areas Fe-20Cr-20Ni-8.0P-5.0Si-2.0Mo are made up primary crystal final solidified region. The dark gray phase bright found region on basis back-scattered electron image observation....
Superconducting quantum circuits are typically housed in conducting enclosures order to control their electromagnetic environment. As devices grow physical size, the modes of enclosure come down frequency and can introduce unwanted long-range cross-talk between distant elements enclosed circuit. Incorporating arrays inductive shunts such as through-substrate vias or machined pillars suppress these effects by raising mode frequencies. Here, we derive simple, accurate models for that...
We developed a new high-sensitive MEMS acceleration sensor for seismic exploration applying automotive control technology of sensor. Using the sensors, we build 100 pieces prototype that detects 3-axial direction (x, y and z axes) system. The is an electronic capacitance type using movable overhung silicon plate electrode has gained achievements application. This detection system excellent in detecting temperature DC characteristic detection. Under theme this study based on sensor, pursued...