8 citations · 8 across the 14 of their papers we have counts for
23 papers
Bosonic unstructured search: quantum enhancement without entanglement
Yu-Xin Wang, Erfan Abbasgholinejad, Supratik Sarkar +4
We consider unstructured search using multimode bosonic quantum systems under energy constraints. The task is to locate an unknown marked mode among possibilities using arbitra…
Ordering-Aware Theory of Trotter Error
Zhenning Liu, Zhi-Yuan Wei, Michael Foss-Feig +2
Product formulas are a basic tool for simulating quantum many-body dynamics, but a fundamental degree of freedom in their application---the ordering of Hamiltonian terms---has rema…
Pricing of graph-based quantum portfolios from first principles
Daniel J. Spencer, Bin Cheng, Dinh-Long Vu +3
A central topic in economics and finance is the valuation of strategic games and bets, of investments providing uncertain future cashflows, and of other asset-like structures and c…
Learning Many-Body Hamiltonians Using a Local Probe
Suying Liu, Zitai Xu, Alexey V. Gorshkov +3
Hamiltonian learning provides a systematic framework for reconstructing unknown quantum dynamics. However, existing protocols typically assume direct measurement access to the enti…
Function-like pseudorandom unitaries generate pseudorandom quantum processes
Zitai Xu, Rahul Arvind, Kishor Bharti +5
Haar-random unitaries provide a canonical model of generic random quantum evolution, but they typically have exponential description and circuit complexity. Although pseudorandom u…
Mixed-state phases induced by power-law quantum channels
Christopher Fechisin, Tsung-Cheng Lu, Zhi-Yuan Wei +4
Open quantum systems can exhibit inherently mixed quantum orders, such as strong-to-weak spontaneous symmetry breaking (SW-SSB), which have no analogue in pure states. It is genera…
Deciding the Attainability of the Multiparameter Quantum Fisher Information is NP-Hard
Lorcan O. Conlon, Laura Shou, V Vijendran +7
The quantum Fisher information (QFI) sets a fundamental bound on the attainable precision when estimating multiple parameters simultaneously. Incompatibility among the individually…
Optimal noisy sequential multiparameter quantum sensing
Andrew Tanggara, Lorcán O Conlon, Alexey V. Gorshkov +1
The most general strategy for estimating parameters of a quantum channel is to probe the channel many times sequentially with the help of coherent ancillary systems. However, findi…
A constructive violation of additivity of minimum output von Neumann entropy
Laura Shou, Alexey V. Gorshkov
We give an explicit non-random example of nonadditivity of minimum output von Neumann entropy. The proof uses a finite-dimensional construction which imitates free Haar unitary beh…
Log-depth entanglement transition in hypercube Gaussian boson sampling
Laura Shou, Alexey V. Gorshkov
We study an entanglement transition at logarithmic depth in random hypercube linear optical networks. Starting from an initial Gaussian state with all modes squeezed, we prove that…
Anticoncentration and entanglement in Gaussian boson sampling
Laura Shou, Adam Ehrenberg, Yu-Xin Wang +2
Anticoncentration and entanglement are two properties used to study classical hardness or easiness of Gaussian boson sampling in varying regimes. In this paper, we consider three d…
Fast GHZ encoding with fidelity
Laura Shou, T. C. Mooney, Twesh Upadhyaya +1
We prove that -fidelity -qubit Greenberger--Horne--Zeilinger (GHZ) encoding can be performed in time using all-to-all 2-local Hamiltonians with bounded 2…
Proof of the hiding conjecture for Gaussian boson sampling with an arbitrary number of squeezed input modes
Laura Shou, Alexey V. Gorshkov, Victor Galitski +1
Gaussian boson sampling (GBS) is a sampling task proposed to demonstrate quantum advantage. We consider Gaussian boson sampling on optical modes, with equally squeezed inpu…
Fock-state preparation based on amplitude amplification in cavity QED
Sharoon Austin, Zhi-Yuan Wei, Kartik Srinivasan +1
In this work, we develop a coherent control technique for cavity QED based on amplitude amplification. We consider two physical platforms. In the first setting, we study a three-le…
Differentially private quantum sensor networks
Daniel J. Spencer, Kaiyan Shi, Emil T. Khabiboulline +2
Quantum sensing is a promising technology capable of demonstrating clear advantage over comparable classical techniques for precise measurement. One application of quantum sensing…
An efficient Pauli decomposition algorithm for structured matrices
Daniel J. Spencer, Kishor Bharti, Alexey V. Gorshkov
Decomposing classical matrices into linear combinations of Pauli strings is a major bottleneck for end-to-end implementations of near-term quantum algorithms. In this work, we cons…
Multiparameter function estimation for general Hamiltonians
Erfan Abbasgholinejad, Sean R. Muleady, Jacob Bringewatt +2
Estimation of physical parameters encoded in a Hamiltonian is a central task in quantum sensing and learning. While the ultimate precision limit for estimating a single parameter c…
Precision Limits of Multiparameter Markovian-Noise Metrology
Anthony J. Brady, Yu-Xin Wang, Luis Pedro García-Pintos +1
Measuring stochastic signals ("noise metrology") constitutes a central task in quantum sensing and the characterization of open quantum systems. Here we establish ultimate precisio…
Depth dependence of entanglement and circuit complexity in random linear optical networks
Laura Shou, Joseph T. Iosue, Yu-Xin Wang +2
We study the growth of entanglement and circuit complexity in random passive linear optical networks as a function of the circuit depth. For entanglement dynamics, we start with an…
Noise-induced contraction of MPO truncation errors in noisy random circuits and Lindbladian dynamics
Zhi-Yuan Wei, Joel Rajakumar, Jon Nelson +3
We study how matrix-product-operator (MPO) truncation errors evolve when simulating two setups: (1) 1D Haar-random circuits under either depolarizing noise or amplitude-damping noi…
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…
Efficiently learning fermionic unitaries with few non-Gaussian gates
Sharoon Austin, Mauro E. S. Morales, Alexey Gorshkov
Fermionic Gaussian unitaries are known to be efficiently learnable and simulatable. In this paper, we present a learning algorithm that learns an -mode circuit containing pa…
Spectrum estimation of density operators with alkaline-earth atoms
Michael E. Beverland, Jeongwan Haah, Gorjan Alagic +3
We show that Ramsey spectroscopy of fermionic alkaline-earth atoms in a square-well trap provides an efficient and accurate estimate for the eigenspectrum of a density matrix whose…