Papers

Armin Rahmani, B. Seradjeh, M. Franz·May 11, 2016

In topological quantum computing, unitary operations on qubits are performed by adiabatic braiding of non-Abelian quasiparticles, such as Majorana zero modes, and are protected from local environmental perturbations. In the adiabatic regime, with tim...

Alex Bocharov, M. Rötteler, K. Svore·May 9, 2016

We determine the cost of performing Shor's algorithm for integer factorization on a ternary quantum computer, using two natural models of universal fault-tolerant computing: (i) a model based on magic state distillation that assumes the availability...

M. Friesen, J. Ghosh, M. Eriksson +1 more·May 6, 2016

Quantum computing promises significant speed-up for certain types of computational problems. However, robust implementations of semiconducting qubits must overcome the effects of charge noise that currently limit coherence during gate operations. Her...

G. Dvali, César Gómez, D. Lüst +2 more·May 4, 2016

By analyzing the key properties of black holes from the point of view of quantum information, we derive a model‐independent picture of black hole quantum computing. It has been noticed that this picture exhibits striking similarities with quantum cri...

M. Takita, A. Córcoles, E. Magesan +5 more·May 4, 2016

We present parity measurements on a five-qubit lattice with connectivity amenable to the surface code quantum error correction architecture. Using all-microwave controls of superconducting qubits coupled via resonators, we encode the parities of four...

N. Vitanov, A. Rangelov, B. Shore +1 more·May 1, 2016

The technique of stimulated Raman adiabatic passage (STIRAP), which allows efficient and selective population transfer between quantum states without suffering loss due to spontaneous emission, was introduced in 1990 (Gaubatz \emph{et al.}, J. Chem. ...

A. Paler, S. Devitt, A. Fowler·Apr 28, 2016

Given a quantum algorithm, it is highly nontrivial to devise an efficient sequence of physical gates implementing the algorithm on real hardware and incorporating topological quantum error correction. In this paper, we present a first step towards th...

D. Ward, Dohun Kim, D. Savage +5 more·Apr 27, 2016

Universal quantum computation requires high-fidelity single-qubit rotations and controlled two-qubit gates. Along with high-fidelity single-qubit gates, strong efforts have been made in developing robust two-qubit logic gates in electrically gated qu...

A. Paler·Apr 11, 2016

The work proposes an extension of the quantum circuit formalism where qubits (wires) are circular instead of linear. The left-to-right interpretation of a quantum circuit is replaced by a circular representation which allows to select the starting po...

Moein Sarvaghad-Moghaddam·Apr 3, 2016

Quantum computing is a new way of data processing based on the concept of quantum mechanics. Quantum circuit design is a process of converting a quantum gate to a series of basic gates and is divided into two general categories based on the decomposi...

Y. Dulek, Christian Schaffner, F. Speelman·Mar 31, 2016

We present a new scheme for quantum homomorphic encryption which is compact and allows for efficient evaluation of arbitrary polynomial-sized quantum circuits. Building on the framework of Broadbent and Jeffery and recent results in the area of insta...

D. Maslov·Mar 24, 2016

We study the problem of compilation of quantum algorithms into optimized physical-level circuits executable in a quantum information processing (QIP) experiment based on trapped atomic ions. We report a complete strategy: starting with an algorithm i...

Alan C. Santos·Mar 16, 2016

Adiabatic evolution is a powerful technique in quantum information and computation. However, its performance is limited by the adiabatic theorem of quantum mechanics. In this scenario, shortcuts to adiabaticity, such as provided by the superadiabatic...

S. Debnath, N. Linke, C. Figgatt +3 more·Mar 15, 2016

Quantum computers can solve certain problems more efficiently than any possible conventional computer. Small quantum algorithms have been demonstrated on multiple quantum computing platforms, many specifically tailored in hardware to implement a part...

Theodore J. Yoder, Ryuji Takagi, I. Chuang·Mar 12, 2016

It is an oft-cited fact that no quantum code can support a set of fault-tolerant logical gates that is both universal and transversal. This no-go theorem is generally responsible for the interest in alternative universality constructions including ma...

S. Weidt, J. Randall, J. Randall +8 more·Mar 10, 2016

Trapped ions are a promising tool for building a large-scale quantum computer. However, the number of required radiation fields for the realization of quantum gates in any proposed ion-based architecture scales with the number of ions within the quan...

C. Chamberland, Tomas Jochym-O'Connor, R. Laflamme·Mar 8, 2016

Quantum error correction and fault tolerance make it possible to perform quantum computations in the presence of imprecision and imperfections of realistic devices. An important question is to find the noise rate at which errors can be arbitrarily su...

J. Moussa·Mar 7, 2016

Surface and color codes are two forms of topological quantum error correction in two spatial dimensions with complementary properties. Surface codes have lower-depth error detection circuits and well-developed decoders to interpret and correct errors...

R. Patel, Joseph Ho, F. Ferreyrol +2 more·Mar 1, 2016

A quantum controlled-SWAP gate is demonstrated and used to implement small-scale algorithms and produce high-fidelity GHZ states. Minimizing the resources required to build logic gates into useful processing circuits is key to realizing quantum compu...

J. Casanova, Zhen-Yu Wang, M. Plenio·Feb 22, 2016

Selective control of qubits in a quantum register for the purposes of quantum information processing represents a critical challenge for dense spin ensembles in solid-state systems. Here we present a protocol that achieves a complete set of selective...