Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
All optical metropolitan quantum key distribution network with post-quantum cryptography authentication.
Yong-Hua Yang, Peiya Li, Shi-Zhao Ma +10 more·Jun 4, 2021
Quantum key distribution (QKD) provides information theoretically secure key exchange requiring authentication of the classic data processing channel via pre-sharing of symmetric private keys to kick-start the process. In previous studies, the lattic...
Quasiparticle tunneling and 1/f charge noise in ultrastrongly coupled superconducting qubit and resonator
A. Tomonaga, H. Mukai, F. Yoshihara +1 more·Jun 3, 2021
A. Tomonaga, 2, ∗ H. Mukai, 2 F. Yoshihara, and J. S. Tsai 2, † Department of Physics, Tokyo University of Science, 1–3 Kagurazaka, Shinjuku, Tokyo 162–0825, Japan RIKEN Center for Quantum Computing (RQC), 2–1 Hirosawa, Wako, Saitama 351–0198, Japan ...
Quantum error correction and holographic information from bilocal holography
R. de Mello Koch, Eunice Gandote, N. H. Tahiridimbisoa +1 more·Jun 1, 2021
Bilocal holography is a constructive approach to the higher spin theory holographically dual to O(N ) vector models. In contrast to other approaches to bulk reconstruction, bilocal holography does not take input from the dual gravitational theory. Th...
Quantum-resistance in blockchain networks
Marcos Allende, D. Le'on, Sergio Cer'on +10 more·Jun 1, 2021
The advent of quantum computing threatens blockchain protocols and networks because they utilize non-quantum resistant cryptographic algorithms. When quantum computers become robust enough to run Shor’s algorithm on a large scale, the most used asymm...
State transfer with separable optical beams and variational quantum algorithms with classical light
Sooryansh Asthana, V. Ravishankar·Jun 1, 2021
Classical electromagnetic fields and quantum mechanics– both obey the principle of superposition alike. This opens up many avenues for simulation of a large variety of phenomena and algorithms, which have hitherto been considered quantum mechanical. ...
Rotational Coherence Times of Polar Molecules in Optical Tweezers.
Sean Burchesky, L. Anderegg, Yicheng Bao +5 more·May 31, 2021
Qubit coherence times are critical to the performance of any robust quantum computing platform. For quantum information processing using arrays of polar molecules, a key performance parameter is the molecular rotational coherence time. We report a 93...
An efficient hybrid hash based privacy amplification algorithm for quantum key distribution
Bingze Yan, Qiong Li, Haokun Mao +1 more·May 28, 2021
Privacy amplification (PA) is an essential part in a quantum key distribution (QKD) system, distilling a highly secure key from a partially secure string by public negotiation between two parties. The optimization objectives of privacy amplification ...
Towards a NISQ Algorithm to Simulate Hermitian Matrix Exponentiation
Keren Li·May 28, 2021
A practical fault-tolerant quantum computer is worth looking forward to as it provides applications that outperform their known classical counterparts. However, millions of interacting qubits with stringent criteria are required, which is intractable...
Optimizing quantum codes with an application to the loss channel with partial erasure information
Benjamin Desef, M. Plenio·May 27, 2021
Quantum error correcting codes (QECCs) are the means of choice whenever quantum systems suffer errors, e.g., due to imperfect devices, environments, or faulty channels. By now, a plethora of families of codes is known, but there is no universal appro...
Perspective - On the thermodynamics of perfect unconditional security
Christiana Chamon, L. Kish·May 26, 2021
A secure key distribution (exchange) scheme is unconditionally secure if it is unbreakable against arbitrary technological improvements of computing power and/or any development of new algorithms. There are only two families of experimentally realize...
Testing symmetry on quantum computers
Margarite L. LaBorde, M. Wilde·May 26, 2021
Symmetry is a unifying concept in physics. In quantum information and beyond, it is known that quantum states possessing symmetry are not useful for certain information-processing tasks. For example, states that commute with a Hamiltonian realizing a...
High-speed programmable photonic circuits in a cryogenically compatible, visible–near-infrared 200 mm CMOS architecture
M. Dong, Genevieve Clark, A. Leenheer +7 more·May 26, 2021
Recent advances in photonic integrated circuits have enabled a new generation of programmable Mach–Zehnder meshes (MZMs) realized by using cascaded Mach–Zehnder interferometers capable of universal linear-optical transformations on N input/output opt...
Efficient Quantum Public-Key Encryption From Learning With Errors
Javad Doliskani·May 26, 2021
Our main result is a quantum public-key encryption scheme based on the Extrapolated Dihedral Coset problem (EDCP) which is equivalent, under quantum polynomial-time reductions, to the Learning With Errors (LWE) problem. For limited number of public k...
Quantum Approximate Optimization Algorithm with Adaptive Bias Fields
Yunlong Yu, Chenfeng Cao, C. Dewey +3 more·May 25, 2021
The quantum approximate optimization algorithm (QAOA) transforms a simple many-qubit wavefunction into one which encodes a solution to a difficult classical optimization problem. It does this by optimizing the schedule according to which two unitary ...
Deterministic coupling of quantum emitter to surface plasmon polaritons, Purcell enhanced generation of indistinguishable single photons and quantum information processing
Lakshminarayan Sharma, L. Tripathi·May 24, 2021
Abstract Integrated photonic circuits are an integral part of all-optical and on-chip quantum information processing and quantum computer. Deterministically integrated single-photon sources in nanoplasmonic circuits lead to densely packed scalable qu...
Time-evolution of local information: thermalization dynamics of local observables
T. Kvorning, L. Herviou, J. Bardarson·May 24, 2021
Quantum many-body dynamics generically result in increasing entanglement that eventually leads to thermalization of local observables. This makes the exact description of the dynamics complex despite the apparent simplicity of (high-temperature) ther...
Fast Preparation and Detection of a Rydberg Qubit Using Atomic Ensembles.
Wenchao Xu, Aditya V. Venkatramani, Sergio H. Cantu +4 more·May 24, 2021
We demonstrate a new approach for fast preparation, manipulation, and collective readout of an atomic Rydberg-state qubit. By making use of Rydberg blockade inside a small atomic ensemble, we prepare a single qubit within 3 μs with a success probabi...
Collapse-in and collapse-out in partial measurement in quantum mechanics and its wise interpretation
G. Long·May 23, 2021
One central issue in quantum mechanics is the relation between the wavefunction and the quantum system it describes. As quantum mechanics is understood in different ways, the wavefunction is given various explanations. Some regard the wavefunction as...
Variational quantum classifiers through the lens of the Hessian
Pinaki Sen, A. Bhatia·May 21, 2021
In quantum computing, the variational quantum algorithms (VQAs) are well suited for finding optimal combinations of things in specific applications ranging from chemistry all the way to finance. The training of VQAs with gradient descent optimization...
Hamiltonian Model for Fault Tolerant Singlet-Like Excitation: First Principles Approach
Donghyun Jin, Grihith Manchanda, D. Davidovic·May 20, 2021
Deriving quantum error correction and quantum control from the Schrodinger equation for a unified qubit-environment Hamiltonian will give insights into how microscopic degrees of freedom affect the capability to control and correct quantum informatio...