Papers

Arvind S. Menon, Nikaash Puri·Dec 11, 2021

This paper proposes a hybrid quantum-classical algorithm that learns a suitable quantum feature map that separates unlabelled data that is originally non linearly separable in the classical space using a Variational quantum feature map and q-means as...

Eyal Rozenberg, Aviv Karnieli, O. Yesharim +5 more·Dec 11, 2021

Spontaneous parametric down-conversion in quantum optics is an invaluable resource for the realization of high-dimensional qudits with spatial modes of light. One of the main open challenges is how to directly generate a desirable qudit state in the ...

I. Novikau, E. Startsev, I. Dodin·Dec 11, 2021

Numerical modeling of radio-frequency waves in plasma with sufficiently high spatial and temporal resolution remains challenging even with modern computers. However, such simulations can be sped up using quantum computers in the future. Here, we propo...

Trevor Keen, E. Dumitrescu, Yan Wang·Dec 10, 2021

We propose quantum algorithms for projective ground-state preparation and calculations of the many-body Green's functions directly in frequency domain. The algorithms are based on the linear combination of unitary (LCU) operations and essentially onl...

Esther Ye, Samuel Yen-Chi Chen·Dec 10, 2021

Quantum computing has promised significant improvement in solving difficult computational tasks over classical computers. Designing quantum circuits for practical use, however, is not a trivial objective and requires expert-level knowledge. To aid th...

L. Abdurakhimov, I. Mahboob, H. Toida +3 more·Dec 10, 2021

Parasitic two-level-system (TLS) defects are one of the major factors limiting the coherence times of superconducting qubits. Although there has been significant progress in characterizing basic parameters of TLS defects, exact mechanisms of interacti...

Y. Futamura, Xiucai Ye, T. Sakurai·Dec 10, 2021

The eigenvalue density of a matrix plays an important role in various types of scientific computing such as electronic-structure calculations. In this paper, we propose a quantum algorithm for computing the eigenvalue density in a given interval. Our...

R. Gautier, A. Sarlette, M. Mirrahimi·Dec 10, 2021

Quantum error correction with biased-noise qubits can drastically reduce the hardware overhead for universal and fault-tolerant quantum computation. Cat qubits are a promising realization of biased-noise qubits as they feature an exponential error bi...

Gokul Subramanian Ravi, Kaitlin N. Smith, P. Gokhale +4 more·Dec 10, 2021

Variational Quantum Algorithms (VQA) are one of the most promising candidates for near-term quantum advantage. Traditionally, these algorithms are parameterized by rotational gate angles whose values are tuned over iterative execution on quantum mach...

S. Ram'irez-Uribe·Dec 10, 2021

A general outlook is presented on the study of multiloop topologies appearing for the first time at four loops. A unified description and representation of this family is provided, the so-called N$^4$MLT universal topology. Based on the Loop-Tree Dua...

E. Rinaldi, R. D. Candia, S. Felicetti +1 more·Dec 10, 2021

Open quantum systems can undergo dissipative phase transitions, and their critical behavior can be exploited in sensing applications. For example, it can be used to enhance the fidelity of superconducting qubit readout measurements, a central problem...

Thomas Steckmann, Trevor Keen, Efekan Kökcü +3 more·Dec 10, 2021

Dynamical mean-field theory (DMFT) maps the local Green's function of the Hubbard model to that of the Anderson impurity model and thus gives an approximate solution of the Hubbard model from the solution of simpler quantum impurity model. Quantum an...

N. Paterakis·Dec 10, 2021

Leveraging the current generation of quantum devices to solve optimization problems of practical interest necessitates the development of hybrid quantum-classical (HQC) solution approaches. In this paper, a multi-cut Benders decomposition (BD) approa...

Arshag Danageozian, M. Wilde, F. Buscemi·Dec 9, 2021

Quantum error correction (QEC) is a procedure by which the quantum state of a system is protected against a known type of noise, by preemptively adding redundancy to that state. Such a procedure is commonly used in quantum computing when thermal nois...

Yuta Tsuchimoto, M. Kroner·Dec 9, 2021

Quantum transducers between microwave and optical photons are essential for long-distance quantum networks based on superconducting qubits. An optically active self-assembled quantum dot molecule (QDM) is an attractive platform for the implementati...

D. Zhu, Gregory D. Kahanamoku-Meyer, L. Lewis +15 more·Dec 9, 2021

Achieving quantum computational advantage requires solving a classically intractable problem on a quantum device. Natural proposals rely upon the intrinsic hardness of classically simulating quantum mechanics; however, verifying the output is itself ...

Raphael Brieger, I. Roth, M. Kliesch·Dec 9, 2021

Flexible characterization techniques that identify and quantify experimental imperfections under realistic assumptions are crucial for the development of quantum computers. Gate set tomography is a characterization approach that simultaneously and se...

Hao Song, Janik Schönmeier-Kromer, Ke Liu +3 more·Dec 9, 2021

Fracton models provide examples of novel gapped quantum phases of matter that host intrinsically immobile excitations and therefore lie beyond the conventional notion of topological order. Here, we calculate optimal error thresholds for quantum error...

G. Khan, Hudaiba Soomro, M. U. Baig +2 more·Dec 9, 2021

It is well known that repeated projective measurements can either speed up (the Zeno effect) or slow down (the anti-Zeno effect) quantum evolution. Until now, however, studies of these effects for a two-level system interacting strongly with its envi...

A. Rajput, A. Roggero, N. Wiebe·Dec 9, 2021

Quantum simulations of lattice gauge theories (LGTs) are often formulated on an enlarged Hilbert space containing both physical and unphysical sectors in order to retain a local Hamiltonian. We provide simple fault-tolerant procedures that exploit su...