Practical Compilation of Quantum Programs

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The faithful bidirectional quantum coherent conversion of microwave (5 GHz) and optical (193.5 THz) quantum states will become essential for future quantum networks. Due to their low transition frequency, qubit states are quickly destroyed at room temperat ...

Quantum metrology, a cornerstone of quantum technologies, exploits entanglement and superposition to achieve higher precision than classical protocols in parameter-estimation tasks. When combined with critical phenomena such as phase transitions, the diver ...

This article presents a cryogenic mode-switching class-F voltage-controlled oscillator (VCO) aimed at addressing the demand for wideband, low phase noise (PN) local oscillator signals in cryo-CMOS quantum controllers. First, to resolve the issues of manual ...

In this work, we study online submodular maximization and how the requirement of maintaining a stable solution impacts the approximation. In particular, we seek bounds on the best-possible approximation ratio that is attainable when the algorithm is allowe ...

Quantum computing not only holds the potential to solve long-standing problems in quantum physics, but also to offer speed-ups across a broad spectrum of other fields. Access to a computational space that incorporates quantum effects, such as superposition ...

Quantum computers have the potential to surpass conventional computing, but they are hindered by noise which induces errors that ultimately lead to the loss of quantum information. This necessitates the development of quantum error correction strategies fo ...

In this thesis, we give new protocols that offer a quantum advantage for problems in ML, Physics, and Finance. Quantum mechanics gives predictions that are inconsistent with local realism. The experiment proving this fact (Bell, 1964) gives a quantum proto ...

Advancing quantum technologies depends on the precise control of individual quantum systems, the so-called qubits, and the exploitation of their quantum properties. Nowadays, expanding the number of qubits to be entangled is at the core of the developments ...

Mechanical oscillators can exhibit modes with ultra-low energy dissipation and compact form factors due to the slow velocity of acoustic waves, and are already used in applications ranging from timing to wireless filters. Over the past decade, novel ways i ...

We propose an adaptive quantum algorithm to prepare accurate variational time evolved wave functions. The method is based on the projected variational quantum dynamics (pVQD) algorithm, that performs a global optimization with linear scaling in the number ...

We introduce a model-independent method for the efficient simulation of low-entropy systems, whose dynamics can be accurately described with a limited number of states. Our method leverages the time-dependent variational principle to efficiently integrate ...

Quantum state reconstruction using Neural Quantum States has been proposed as a viable tool to reduce quantum shot complexity in practical applications, and its advantage over competing techniques has been shown in numerical experiments focusing mainly on ...

We explore applications of quantum computing for radio interferometry and astronomy using recent developments in quantum image processing. We evaluate the suitability of different quantum image representations using a toy quantum computing image reconstruc ...

Parametric amplifiers play a crucial role in modern quantum technology by enabling the enhancement of weak signals with minimal added noise. Traditionally, Josephson junctions have been the primary choice for constructing parametric amplifiers. Nevertheles ...

Since the advent of internet and mass communication, two public-key cryptographic algorithms have shared the monopoly of data encryption and authentication: Diffie-Hellman and RSA. However, in the last few years, progress made in quantum physics -- and mo ...

Current cryptographic solutions will become obsolete with the arrival of large-scale universal quantum computers. As a result, the National Institute of Standards and Technology supervises a post-quantum standardization process which involves evaluating ca ...

Quantum sensors and qubits are usually two-level systems (TLS), the quantum analogues of classical bits assuming binary values 0 or 1. They are useful to the extent to which superpositions of 0 and 1 persist despite a noisy environment. The standard prescr ...

Quantum support vector machines employ quantum circuits to define the kernel function. It has been shown that this approach offers a provable exponential speedup compared to any known classical algorithm for certain data sets. The training of such models c ...

Entanglement forging based variational algorithms leverage the bipartition of quantum systems for addressing ground-state problems. The primary limitation of these approaches lies in the exponential summation required over the numerous potential basis stat ...

The continued development of computational approaches to many-body ground-state problems in physics and chemistry calls for a consistent way to assess its overall progress. In this work, we introduce a metric of variational accuracy, the V-score, obtained ...

Practical Compilation of Quantum Programs

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Towards microwave-to-optical quantum transduction with barium titanate/strontium titanate integrated photonics

Criticality-Enhanced Quantum Sensing with a Parametric Superconducting Resonator

A Cryo-CMOS Wideband Mode-Switching Class-F VCO With Harmonic-Resonance Self-Alignment

The Cost of Consistency: Submodular Maximization with Constant Recourse

Scalable Quantum Algorithms for Noisy Quantum Computers

Quantum Error Correction and Simulation in Open Bosonic Systems

Quantum Protocols for ML, Physics, and Finance

Electron-beam based nanoscale quantum controls

Ultra-high quantum coherent and scalable superconducting circuit optomechanics, from topological lattices to quantum storage

Adaptive projected variational quantum dynamics

Adaptive variational low-rank dynamics for open quantum systems

Empirical Sample Complexity of Neural Network Mixed State Reconstruction

Quantum radio astronomy: Data encodings and quantum image processing

Three-wave-mixing quantum-limited kinetic inductance parametric amplifier operating at 6 T near 1 K

Secure and Efficient Cryptographic Algorithms in a Quantum World

Side-channel analysis of isogeny-based key encapsulation mechanisms and hash-based digital signatures

Emergence of highly coherent two-level systems in a noisy and dense quantum network

The complexity of quantum support vector machines

Hybrid ground-state quantum algorithms based on neural Schrödinger forging

Variational benchmarks for quantum many-body problems