Showing 2020 · quant-phShow all

15 papers · 2 filters

quant-ph2020★ 7 cited

Dissipative failure of adiabatic quantum transport as a dynamical phase transition

Fergus Barratt, Aleix Bou Comas, Philip J. D. Crowley +3

Entanglement is the central resource in adiabatic quantum transport. Dephasing affects the availability of that resource by biasing trajectories, driving transitions between succes…

quant-ph2020★ 12 cited

Higher-dimensional Hong-Ou-Mandel effect and state redistribution with linear-optical multiports

Shuto Osawa, David S. Simon, Alexander V. Sergienko

We expand the two-photon Hong-Ou-Mandel (HOM) effect onto a higher-dimensional set of spatial modes and introduce an effect that allows controllable redistribution of quantum state…

quant-ph2020★ 28 cited

Shortcuts to Dynamic Polarization

Tamiro Villazon, Pieter W. Claeys, Anatoli Polkovnikov +1

Dynamic polarization protocols aim to hyperpolarize a spin bath by transferring spin polarization from a well-controlled qubit such as a quantum dot or a color defect. Building on…

quant-ph2020★ 212 cited

Dynamical obstruction to localization in a disordered spin chain

Dries Sels, Anatoli Polkovnikov

We analyze a one-dimensional XXZ spin chain in a disordered magnetic field. As the main probes of the system's behavior we use the sensitivity of eigenstates to adiabatic transform…

quant-ph2020★ 25 cited

Ferromagnetic Gyroscopes for Tests of Fundamental Physics

Pavel Fadeev, Chris Timberlake, Tao Wang +6

A ferromagnetic gyroscope (FG) is a ferromagnet whose angular momentum is dominated by electron spin polarization and that will precess under the action of an external torque, such…

quant-ph2020★ 8 cited

Quantum eigenstates from classical Gibbs distributions

Pieter W. Claeys, Anatoli Polkovnikov

We discuss how the language of wave functions (state vectors) and associated non-commuting Hermitian operators naturally emerges from classical mechanics by applying the inverse Wi…

quant-ph2020★ 8 cited

A superconducting circuit realization of combinatorial gauge symmetry

Claudio Chamon, Dmitry Green, Andrew J. Kerman

We propose a superconducting quantum circuit based on a general symmetry principle -- combinatorial gauge symmetry -- designed to emulate topologically-ordered quantum liquids and…

quant-ph2020★ 1 cited

Tight Quantum Time-Space Tradeoffs for Function Inversion

Kai-Min Chung, Siyao Guo, Qipeng Liu +1

In function inversion, we are given a function , and want to prepare some advice of size , such that we can efficiently invert any image in time . This is…

quant-ph2020★ 21 cited

Adiabatic landscape and optimal paths in ergodic systems

Sho Sugiura, Pieter W. Claeys, Anatoly Dymarsky +1

Whether one is interested in quantum state preparation or in the design of efficient heat engines, adiabatic (reversible) transformations play a pivotal role in minimizing computat…

quant-ph2020★ 13 cited

Succinct Blind Quantum Computation Using a Random Oracle

Jiayu Zhang

In the universal blind quantum computation problem, a client wants to make use of a single quantum server to evaluate where is an arbitrary quantum circuit while k…

quant-ph2020★ 148 cited

Adiabatic eigenstate deformations as a sensitive probe for quantum chaos

Mohit Pandey, Pieter W. Claeys, David K. Campbell +2

In the past decades, it was recognized that quantum chaos, which is essential for the emergence of statistical mechanics and thermodynamics, manifests itself in the effective descr…

quant-ph2020★ 20 cited

Quantum-Clustered Two-Photon Walks

David S. Simon, Shuto Osawa, Alexander V. Sergienko

We demonstrate a previously unknown two-photon effect in a discrete-time quantum walk. Two identical bosons with no mutual interactions nonetheless can remain clustered together as…

quant-ph2020★ 22 cited

Predicting excited states from ground state wavefunction by supervised quantum machine learning

Hiroki Kawai, Yuya O. Nakagawa

Excited states of molecules lie in the heart of photochemistry and chemical reactions. The recent development in quantum computational chemistry leads to inventions of a variety of…

quant-ph2020★ 187 cited

Hyper-optimized tensor network contraction

Johnnie Gray, Stefanos Kourtis

Tensor networks represent the state-of-the-art in computational methods across many disciplines, including the classical simulation of quantum many-body systems and quantum circuit…

quant-ph2020★ 13 cited

Probing XY phase transitions in a Josephson junction array with tunable frustration

R. Cosmic, K. Kawabata, Y. Ashida +5

The seminal theoretical works of Berezinskii, Kosterlitz, and Thouless presented a new paradigm for phase transitions in condensed matter that are driven by topological excitations…