Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Periodic Fourier representation of Boolean functions
R. Mori·Mar 27, 2018
In this work, we consider a new type of Fourier-like representation of Boolean function f\colon\{+1,-1\}^n\to\{+1,-1\}: f(x) = \cos(\pi\sum_{S\subseteq[n]}\phi_S \prod_{i\in S} x_i). This representation, which we call the periodic Fourier representat...
Quantum machine learning for electronic structure calculations
Rongxin Xia, S. Kais·Mar 27, 2018
Considering recent advancements and successes in the development of efficient quantum algorithms for electronic structure calculations—alongside impressive results using machine learning techniques for computation—hybridizing quantum computing with m...
Quantum speedup in stoquastic adiabatic quantum computation
K. Fujii·Mar 27, 2018
Quantum computation provides exponential speedup for solving certain mathematical problems against classical computers. Motivated by current rapid experimental progress on quantum computing devices, various models of quantum computation have been inv...
Tunable Coupling Scheme for Implementing High-Fidelity Two-Qubit Gates
F. Yan, P. Krantz, Youngkyu Sung +6 more·Mar 26, 2018
The prospect of computational hardware with quantum advantage relies critically on the quality of quantum gate operations. Imperfect two-qubit gates is a major bottleneck for achieving scalable quantum information processors. Here, we propose a gener...
Flag fault-tolerant error correction, measurement, and quantum computation for cyclic Calderbank-Shor-Steane codes
Theerapat Tansuwannont, C. Chamberland, D. Leung·Mar 26, 2018
Flag qubits have recently been proposed in syndrome extraction circuits to detect high-weight errors arising from fewer faults. The use of flag qubits allows the construction of fault-tolerant protocols with the fewest number of ancillas known to-dat...
Entanglement-Based Feature Extraction by Tensor Network Machine Learning
Yuhan Liu, Xiao Zhang, M. Lewenstein +1 more·Mar 24, 2018
It is a hot topic how entanglement, a quantity from quantum information theory, can assist machine learning. In this work, we implement numerical experiments to classify patterns/images by representing the classifiers as matrix product states (MPS). ...
Joint Quantum-State and Measurement Tomography with Incomplete Measurements.
Adam C. Keith, Adam C. Keith, C. Baldwin +3 more·Mar 22, 2018
Estimation of quantum states and measurements is crucial for the implementation of quantum information protocols. The standard method for each is quantum tomography. However, quantum tomography suffers from systematic errors caused by imperfect knowl...
A quantum algorithm for simulating non-sparse Hamiltonians
C. Wang, Leonard Wossnig·Mar 22, 2018
We present a quantum algorithm for simulating the dynamics of Hamiltonians that are not necessarily sparse. Our algorithm is based on the input model where the entries of the Hamiltonian are stored in a data structure in a quantum random access memor...
Quantum repeated interactions and the chaos game
T. Platini, R. J. Low·Mar 22, 2018
Inspired by the algorithm of Barnsley’s chaos game, we construct an open quantum system model based on the repeated interaction process. We show that the quantum dynamics of the appropriate fermionic/bosonic system (in interaction with an environment...
Towards a Particle-Number Conserving Theory of Majorana Zero Modes in p+ip Superfluids
Yiruo Lin, A. Leggett·Mar 21, 2018
Majorana zero modes are predicted to exist in p+ip (either inherent or effective due to proximity effect) superfluids and are proposed to be used for constructing topological qubits for topologically protected quantum computing. Existing theories on ...
"Thinking Quantum": Lectures on Quantum Theory
Barak Shoshany·Mar 19, 2018
We present a conceptually clear introduction to quantum theory, deriving the theory from scratch from the point of view of quantum information. Different subsets of these lectures were taught to a wide variety of audiences, including exceptional high...
Comparing and Integrating Constraint Programming and Temporal Planning for Quantum Circuit Compilation
Kyle E. C. Booth, M. Do, J. Christopher Beck +3 more·Mar 19, 2018
Recently, the makespan-minimization problem of compiling a general class of quantum algorithms into near-term quantum processors has been introduced to the AI community. The research demonstrated that temporal planning is a strong approach for a ...
Synthesis of Logical Clifford Operators via Symplectic Geometry
Narayanan Rengaswamy, R. Calderbank, H. Pfister +1 more·Mar 19, 2018
Quantum error-correcting codes can be used to protect qubits involved in quantum computation. This requires that logical operators acting on protected qubits be translated to physical operators (circuits) acting on physical quantum states. We propose...
Efficient algorithm to compute the second Chern number in four dimensional systems
M. Mochol-Grzelak, A. Dauphin, A. Celi +1 more·Mar 19, 2018
Topological insulators are exotic material that possess conducting surface states protected by the topology of the system. They can be classified in terms of their properties under discrete symmetries and are characterized by topological invariants. ...
Quantum Machine Learning in Feature Hilbert Spaces.
M. Schuld, N. Killoran·Mar 19, 2018
A basic idea of quantum computing is surprisingly similar to that of kernel methods in machine learning, namely, to efficiently perform computations in an intractably large Hilbert space. In this Letter we explore some theoretical foundations of this...
Blind quantum computing can always be made verifiable
T. Morimae·Mar 18, 2018
Blind quantum computing enables a client, who does not have enough quantum technologies, to delegate her quantum computing to a remote quantum server in such a way that her privacy is protected against the server. Some blind quantum computing protoco...
Designing quantum router in IBM quantum computer
B. K. Behera, Tasnum Reza, Angad Gupta +1 more·Mar 17, 2018
Quantum router is an essential ingredient in a quantum network. Here, we propose a new quantum circuit for designing quantum router by using IBM’s five-qubit quantum computer. We design an equivalent quantum circuit, by means of single-qubit and two-...
Experimental Demonstration of Non-Destructive Discrimination of Arbitrary Set of Orthogonal Quantum States Using 5-qubit IBM Quantum Computer on Cloud
Ayan Majumder, Anil Kumar·Mar 16, 2018
A protocol for non-destructive descrimination of arbitrary set of orthogonal quantum states was proposed by V. S. Manu et al., using an algorithm based on quantum phase estimation. IBM Corporation has released a superconductivity based 5-qubit (5-qub...
Restoring Heisenberg scaling in noisy quantum metrology by monitoring the environment
F. Albarelli, M. Rossi, D. Tamascelli +1 more·Mar 15, 2018
We study quantum frequency estimation for N qubits subjected to independent Markovian noise, via strategies based on time-continuous monitoring of the environment. Both physical intuition and an extended convexity property of the quantum Fisher infor...
Quality Attributes on Quantum Computing Platforms
B. Sodhi·Mar 15, 2018
As the practical Quantum Computing Platforms (QCPs) rapidly become a reality, it is desirable to harness their true potential in software applications. Thus it becomes important to determine the implications of QCPs for software architecture. In this...