K. M. Sundqvist

Thermal effects on the resistive superconducting transition in step-edge YBCO squid arrays

Marcio C. de Andrade, Nicholas B. Ferrante, M. Z. Maialle, K. M. Sundqvist et autres

Abstract The effect of thermal fluctuations in yttrium barium copper oxide SQUID filters (SQIFs), containing arrays of 258, 2304, and 4080 superconducting quantum interference devices (SQUIDs), were investigated using the electrical resistivity and applied magnetic field up to 9 T. Our study …

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Thermal effects on the resistive superconducting transition in step-edge YBCO squid arrays

Marcio C. de Andrade, M. Z. Maialle, Nicholas B. Ferrante, K. M. Sundqvist et autres

Abstract The effect of thermal fluctuations in Yttrium Barium Copper Oxide (YBCO) SQUID filters (SQIFs), containing arrays of 258, 2304, and 4080 SQUIDs, were investigated using the electrical resistivity and applied magnetic field up to 9 tesla. Our study reveals that the …

Memristor Equations: Incomplete Physics and Undefined Passivity/Activity

K. M. Sundqvist, David K. Ferry, László B. Kish

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Developing SLH Theory for Use with Microwave Circuits

Antonio Cobarrubia, K. M. Sundqvist

Circuit modeling and simulation techniques are necessary to the development of advanced microwave architectures. In particular, microwave circuits used in the quantum regime can produce a variety of single-photon phenomena related to qubits such as unitary gate operations, quantum illumination, and quantum …

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An Engineer’s Brief Introduction to Microwave Quantum Optics

Malida O. Hecht, Antonio Cobarrubia, K. M. Sundqvist

Classical microwave circuit theory is incomplete in that it is incapable of fully modeling some phenomena at the quantum level. Various theoretical frameworks can be employed to incorporate single-photon statistical effects in the treatment of microwave networks. Such methods include quantum input-output …

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Multi-Qubit Size-Hopping Deutsch-Jozsa Algorithm with Qubit Reordering for Secure Quantum Key Distribution

Rohit De, Raymond Moberly, Colton Beery, Jeremy Juybari et autres

As a classic quantum computing implementation, the Deustch-Jozsa (DJ) algorithm is taught in many courses pertaining to quantum information science and technology (QIST). We exploit the DJ framework as an educational testbed, illustrating fundamental qubit concepts while identifying associated algorithmic challenges. In …

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An Engineer's Brief Introduction to Microwave Quantum Optics and a Single-Port State-Space Representation

Malida O. Hecht, Antonio Cobarrubia, K. M. Sundqvist

Classical microwave circuit theory is incapable of representing some phenomena at the quantum level. To include quantum statistical effects, various theoretical treatments can be employed. Quantum input-output network (QION) theory is one such treatment. Another formalism, called SLH theory, incorporates scattering matrices …

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An Engineer's Brief Introduction to Microwave Quantum Optics and a Single-Port State-Space Representation

Malida O. Hecht, Antonio Cobarrubia, K. M. Sundqvist

Classical microwave circuit theory is incapable of representing some phenomena at the quantum level. To include quantum statistical effects, various theoretical treatments can be employed. Quantum input-output network (QION) theory is one such treatment. Another formalism, called SLH theory, incorporates scattering matrices …

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Exploring Analog Emulation of Quantum Computation Using Quadrature Modulation

K. M. Sundqvist, Isaac Grubb, Kristopher McBrian, Rohit De et autres

An engineer's brief introduction to microwave quantum optics and a\n single-port state-space representation

Malida O. Hecht, Antonio Cobarrubia, K. M. Sundqvist

Classical microwave circuit theory is incapable of representing some\nphenomena at the quantum level. To include quantum statistical effects when\ntreating microwave networks, various theoretical treatments can be employed\nsuch as quantum input-output network (QION) theory and SLH theory. However,\nthese require a reformulation of classical …

High-field spatial imaging of charge transport in silicon at low temperature

C. Stanford, R. A. Moffatt, Noah Kurinsky, Paul L. Brink et autres

We present direct imaging measurements of charge transport across a 1 cm × 1 cm × 4 mm-thick crystal of high purity silicon (∼15 kΩ-cm) at temperatures of 5 K and 500 mK. We use these data to measure lateral diffusion of …

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Spatial imaging of charge transport in silicon at low temperature

R. A. Moffatt, Noah Kurinsky, C. Stanford, John Allen et autres

We present direct imaging measurements of charge transport across a 1 cm × 1 cm × 4 mm crystal of high purity silicon (∼20 kΩ cm) at temperatures between 500 mK and 5 K. We use these data to determine the intervalley …

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