Joint Quantum Institute

Hybrid qubit-oscillator module from motional states of two interacting atoms

Jaeyong Hwang, Tianrui Xu, Sean R. Muleady +5

We propose a qubit-oscillator platform based on the motional states of two interacting atoms in an optical tweezer. By stroboscopically modulating an engineered trap with tunable a…

The Pound-Drever-Hall Method for Superconducting-Qubit Readout

Ibukunoluwa Adisa, Won Chan Lee, Kevin C. Cox +1

Scaling quantum computers to large sizes requires the implementation of many parallel qubit readouts. Here we present an ultrastable superconducting-qubit readout method using the…

Measurement-induced entanglement in noisy 2D random circuits

Zhi-Yuan Wei, Jon Nelson, Joel Rajakumar +4

We study measurement-induced entanglement (MIE) generated by column-by-column sampling of noisy 2D random circuits of size $N$ and depth $T$ . Focusing primarily on Clifford circuit…

Qudit low-density parity-check codes

Daniel J. Spencer, Andrew Tanggara, Tobias Haug +2

Qudits offer significant advantages over qubit-based architectures, including more efficient gate compilation, reduced resource requirements, improved error-correction primitives,…

Utility-Scale Quantum State Preparation: Classical Training using Pauli Path Simulation

Cheng-Ju Lin, Hrant Gharibyan, Vincent P. Su

We use Pauli Path simulation to variationally obtain parametrized circuits for preparing ground states of various quantum many-body Hamiltonians. These include the quantum Ising mo…

A vapor-cavity-QED system for quantum computation and communication

Sharoon Austin, Dhruv Devulapalli, Khoi Hoang +3

In this work, we propose performing key operations in quantum computation and communication using room-temperature atoms moving across a grid of high-quality-factor, small-mode-vol…

Hamiltonian quantum gates -- energetic advantage from entangleability

Josey Stevens, Sebastian Deffner

Hamiltonian quantum gates controlled by classical electromagnetic fields form the basis of any realistic model of quantum computers. In this letter, we derive a lower bound on the…

Quantum Machine Learning for State Tomography Using Classical Data

Shabnam Jabeen, Dmytro Kurdydyk, Aadi Palnitkar +3

Reconstructing quantum states from measurement data represents a formidable challenge in quantum information science, especially as system sizes grow beyond the reach of traditiona…

Lieb-Mattis states for robust entangled differential phase sensing

Raphael Kaubruegger, Diego Fallas Padilla, Athreya Shankar +9

We explore a two-node, entanglement-enhanced sensor network for differential phase sensing that exploits decoherence-free subspaces to suppress common-mode noise, a primary limitat…

Quantum Routing and Entanglement Dynamics Through Bottlenecks

Dhruv Devulapalli, Chao Yin, Andrew Y. Guo +4

To implement arbitrary quantum circuits in architectures with restricted interactions, one may effectively simulate all-to-all connectivity by routing quantum information. We consi…

Hardware-Efficient Universal Linear Transformations for Optical Modes in the Synthetic Time Dimension

Jasvith Raj Basani, Chaohan Cui, Jack Postlewaite +2

Recent progress in photonic information processing has spurred strong demand in scalable and reconfigurable photonic circuitry. Conventional spatially-meshed multi-port interferome…

Simon's Period Finding on a Quantum Annealer

Reece Robertson, Emery Doucet, Zakaria Mzaouali +3

Dating to 1994, Simon's period-finding algorithm is among the earliest and most fragile of quantum algorithms. The algorithm's fragility arises from the requirement that, to solve…

quant-ph2025★ 33 cited

Roadmap on Quantum Thermodynamics

Steve Campbell, Irene D'Amico, Mario A. Ciampini +66

The last two decades has seen quantum thermodynamics become a well established field of research in its own right. In that time, it has demonstrated a remarkably broad applicabilit…

Simulation of a rapid qubit readout dependent on the transmission of a single fluxon

Waltraut Wustmann, Kevin D. Osborn

The readout speed of qubits is a major limitation for error correction in quantum information science. We show simulations of a proposed device that gives readout of a fluxonium qu…

Utilizing discrete variable representations for decoherence-accurate numerical simulation of superconducting circuits

Brittany Richman, C. J. Lobb, Jacob M. Taylor

Given the prevalence of superconducting platforms for uses in quantum computing and quantum sensing, the simulation of quantum superconducting circuits has become increasingly impo…

State preparation with parallel-sequential circuits

Zhi-Yuan Wei, Daniel Malz

We introduce parallel-sequential (PS) circuits, a family of quantum circuit layouts that interpolate between brickwall and sequential circuits, which introduces control parameters…

No-go theorem for environment-assisted invariance in non-unitary dynamics

Akira Sone, Akram Touil, Kenji Maeda +2

We elucidate the requirements for quantum operations that achieve environment-assisted invariance (envariance), a symmetry of entanglement. While envariance has traditionally been…

quant-ph2025★ 3 cited

Clifford circuit based heuristic optimization of fermion-to-qubit mappings

Jeffery Yu, Yuan Liu, Sho Sugiura +2

Simulation of interacting fermionic Hamiltonians is one of the most promising applications of quantum computers. However, the feasibility of analysing fermionic systems with a quan…

Dynamical complexity of non-Gaussian many-body systems with dissipation

Guillermo González-García, Alexey V. Gorshkov, J. Ignacio Cirac +1

We characterize the dynamical state of many-body bosonic and fermionic many-body models with inter-site Gaussian couplings, on-site non-Gaussian interactions and local dissipation…

Singlet-only Always-on Gapless Exchange Qubits with Baseband Control

Nathan L. Foulk, Silas Hoffman, Katharina Laubscher +1

We propose a singlet-only always-on gapless exchange (SAGE) spin qubit that encodes a single qubit in the spins of four electrons while allowing universal baseband control. While c…