Papers

James R. Wootton, Andreas Peter, J. R. Winkler +1 more·Aug 17, 2016

Current quantum technology is approaching the system sizes and fidelities required for quantum error correction. It is therefore important to determine exactly what is needed for proof-of-principle experiments, which will be a major step towards faul...

J. Nichol, L. Orona, S. Harvey +4 more·Aug 15, 2016

Electron spins in semiconductors are promising qubits because their long coherence times enable nearly 109 coherent quantum gate operations. However, developing a scalable high-fidelity two-qubit gate remains challenging. Here, we demonstrate an enta...

Hai‐Rui Wei, Fuguo Deng, G. Long·Aug 8, 2016

Encoding qubits in multiple degrees of freedom (DOFs) of a quantum system allows less-decoherence quantum information processing with much less quantum resources. We present a compact and scalable quantum circuit to determinately implement a hyper-pa...

T. Humble, M. Ericson, J. Jakowski +6 more·Aug 4, 2016

Developing devices that can reliably and accurately demonstrate the principles of superposition and entanglement is an on-going challenge for the quantum computing community. Modeling and simulation offer attractive means of testing early device desi...

S. Boixo, S. Isakov, V. Smelyanskiy +6 more·Jul 31, 2016

A critical question for quantum computing in the near future is whether quantum devices without error correction can perform a well-defined computational task beyond the capabilities of supercomputers. Such a demonstration of what is referred to as q...

Chengxian Zhang, Xu-Chen Yang, Xin Wang·Jul 27, 2016

We study theoretically the responses of the dynamically corrected gates to time-dependent noises in the exchange-only spin qubit system. We consider $1/f$ noises having spectra proportional to $1/\omega^\alpha$, where the exponent $\alpha$ indicates ...

Jeffrey Marshall, L. Venuti, P. Zanardi·Jul 12, 2016

Dissipation can be used as a resource to control and simulate quantum systems. We discuss a modular model based on fast dissipation capable of performing universal quantum computation, and simulating arbitrary Lindbladian dynamics. The model consists...

Shota Nagayama, A. Fowler, D. Horsman +2 more·Jul 3, 2016

The yield of physical qubits fabricated in the laboratory is much lower than that of classical transistors in production semiconductor fabrication. Actual implementations of quantum computers will be susceptible to loss in the form of physically faul...

O. D. Matteo, M. Mosca·Jun 23, 2016

Quantum circuit synthesis is the process in which an arbitrary unitary operation is decomposed into a sequence of gates from a universal set, typically one which a quantum computer can implement both efficiently and fault-tolerantly. As physical impl...

T. Morimae·Jun 21, 2016

Verifiable blind quantum computing is a secure delegated quantum computing where a client with a limited quantum technology delegates her quantum computing to a server who has a universal quantum computer. The client's privacy is protected (blindness...

Jiaheng Yang, Xiaodong He, R. Guo +7 more·Jun 17, 2016

We demonstrate that the coherence of a single mobile atomic qubit can be well preserved during a transfer process among different optical dipole traps (ODTs). This is a prerequisite step in realizing a large-scale neutral atom quantum information pro...

M. Khezri, E. Mlinar, J. Dressel +1 more·Jun 14, 2016

Measuring a transmon qubit in circuit QED: dressed squeezed states Mostafa Khezri, 1, 2, ∗ Eric Mlinar, 1 Justin Dressel, 3, 4 and Alexander N. Korotkov 1 arXiv:1606.04204v2 [quant-ph] 1 Aug 2016 Department of Electrical and Computer Engineering, Uni...

Earl T. Campbell, Mark Howard·Jun 6, 2016

The standard approach to fault-tolerant quantum computation is to store information in a quantum error correction code, such as the surface code, and process information using a strategy that can be summarized as distill-then-synthesize. In the disti...

G. Pica, B. Lovett·May 25, 2016

The possibility of quantum computing with spins in germanium nanoscale transistors has recently attracted interest since it promises highly tuneable qubits that have encouraging coherence times. We here present the first complete theory of the orbita...

Mariam Zomorodi-Moghadam, M. Houshmand, M. Houshmand·May 25, 2016

The presented work provides a procedure for optimizing the communication cost of a distributed quantum circuit (DQC) in terms of the number of qubit teleportations. Because of technology limitations which do not allow large quantum computers to work ...

R. N. Alexander, P. Turner, S. Bartlett·May 25, 2016

Randomized benchmarking is routinely used as an efficient method for characterizing the performance of sets of elementary logic gates in small quantum devices. In the measurement-based model of quantum computation, logic gates are implemented via sin...

H. Buhrman, Matthias Christandl, Christopher Perry +1 more·May 25, 2016

By how much must the communication complexity of a function increase if we demand that the parties not only correctly compute the function but also return all registers (other than the one containing the answer) to their initial states at the end of ...

E. Nikahd, M. Sedighi, M. S. Zamani·May 23, 2016

Using transversal gates is a straightforward and efficient technique for fault-tolerant quantum computing. Since transversal gates alone cannot be computationally universal, they must be combined with other approaches such as magic state distillation...

C. Lai, Yicong Zheng, T. Brun·May 18, 2016

Stabilizer states are extensively studied in quantum information theory for their structures based on the Pauli group. Calderbank-Shor-Steane (CSS) stabilizer states are of particular importance in their application to fault-tolerant quantum computat...

B. Hacker, S. Welte, G. Rempe +1 more·May 17, 2016

That two photons pass each other undisturbed in free space is ideal for the faithful transmission of information, but prohibits an interaction between the photons. Such an interaction is, however, required for a plethora of applications in optical qu...