Papers
Live trends in quantum computing research, updated daily from arXiv.
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Randomized benchmarking in measurement-based quantum computing
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...
Demonstration of qubit operations below a rigorous fault tolerance threshold with gate set tomography
R. Blume-Kohout, J. Gamble, E. Nielsen +4 more·May 24, 2016
Quantum information processors promise fast algorithms for problems inaccessible to classical computers. But since qubits are noisy and error-prone, they will depend on fault-tolerant quantum error correction (FTQEC) to compute reliably. Quantum erro...
Tensor networks, $p$-adic fields, and algebraic curves: arithmetic and the AdS$_3$/CFT$_2$ correspondence
M. Heydeman, M. Marcolli, Ingmar Saberi +1 more·May 24, 2016
One of the many remarkable properties of conformal field theory in two dimensions is its connection to algebraic geometry. Since every compact Riemann surface is a projective algebraic curve, many constructions of interest in physics (which a priori ...
A CMOS silicon spin qubit
R. Maurand, X. Jehl, D. Kotekar-Patil +8 more·May 24, 2016
Silicon, the main constituent of microprocessor chips, is emerging as a promising material for the realization of future quantum processors. Leveraging its well-established complementary metal–oxide–semiconductor (CMOS) technology would be a clear as...
Nonuniform code concatenation for universal fault-tolerant quantum computing
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...
An efficient and compact quantum switch for quantum circuits
Yulin Wu, Li‐Ping Yang, Yarui Zheng +11 more·May 22, 2016
The engineering of quantum devices has reached the stage where we now have small scale quantum processors containing multiple interacting qubits within them. Simple quantum circuits have been demonstrated and scaling up to larger numbers is underway....
High Visibility Time-Energy Entangled Photons from a Silicon Nanophotonic Chip
S. Rogers, D. Mulkey, Xiyuan Lu +2 more·May 20, 2016
Advances in quantum photonics have shown that chip-scale quantum devices are translating from the realm of basic research to applied technologies. Recent developments in integrated photonic circuits and single photon detectors indicate that the bottl...
Quantum enigma machine: Experimentally demonstrating quantum data locking.
Daniel J. Lum, J. Howell, M. S. Allman +5 more·May 20, 2016
Shannon proved in 1949 that information-theoretic-secure encryption is possible if the encryption key is used only once, is random, and is at least as long as the message itself. Notwithstanding, when information is encoded in a quantum system, the p...
Performing Quantum Computing Experiments in the Cloud
S. Devitt·May 18, 2016
Quantum computing technology has reached a second renaissance in the past five years. Increased interest from both the private and public sector combined with extraordinary theoretical and experimental progress has solidified this technology as a maj...
Fault-tolerant preparation of stabilizer states for quantum Calderbank-Shor-Steane codes by classical error-correcting codes
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...
A photon–photon quantum gate based on a single atom in an optical resonator
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...
Quantum computing with atomic qubits and Rydberg interactions: progress and challenges
M. Saffman·May 17, 2016
We present a review of quantum computation with neutral atom qubits. After an overview of architectural options and approaches to preparing large qubit arrays we examine Rydberg mediated gate protocols and fidelity for two- and multi-qubit interactio...
Process tomography of quantum channels using classical light
B. Ndagano, Benjamin Perez-Garcia, F. Roux +7 more·May 17, 2016
High-dimensional entanglement with spatial modes of light promises increased security and information capacity over quantum channels. Unfortunately, entanglement decays due to perturbations, corrupting quantum links which cannot be repaired without a...
On the problem of non-zero word error rates for fixed-rate error correction codes in continuous variable quantum key distribution
S. Johnson, A. Lance, L. Ong +3 more·May 16, 2016
The maximum operational range of continuous variable quantum key distribution protocols has shown to be improved by employing high-efficiency forward error correction codes. Typically, the secret key rate model for such protocols is modified to accou...
Capacities of Quantum Amplifier Channels
H. Qi, M. Wilde·May 16, 2016
Quantum amplifier channels are at the core of several physical processes. Not only do they model the optical process of spontaneous parametric down-conversion, but the transformation corresponding to an amplifier channel also describes the physics of...
Real-time dynamics of lattice gauge theories with a few-qubit quantum computer
E. Martinez, C. Muschik, P. Schindler +8 more·May 15, 2016
Gauge theories are fundamental to our understanding of interactions between the elementary constituents of matter as mediated by gauge bosons. However, computing the real-time dynamics in gauge theories is a notorious challenge for classical computat...
Experimental quantum data locking
Yang Liu, Zhu Cao, Cheng Wu +13 more·May 13, 2016
Classical correlation can be locked via quantum means: quantum data locking. With a short secret key, one can lock an exponentially large amount of information in order to make it inaccessible to unauthorized users without the key. Quantum data locki...
Resilience to time-correlated noise in quantum computation
Hector Bombin·May 12, 2016
Fault-tolerant quantum computation techniques rely on weakly correlated noise. Here I show that it is enough to assume weak spatial correlations: time correlations can take any form. In particular, single-shot error correction techniques exhibit a no...
Quantum computing with acceptor spins in silicon
J. Salfi, Mengyang Tong, S. Rogge +1 more·May 11, 2016
The states of a boron acceptor near a Si/SiO2 interface, which bind two low-energy Kramers pairs, have exceptional properties for encoding quantum information and, with the aid of strain, both heavy hole and light hole-based spin qubits can be design...
Optimal diabatic dynamics of Majorana-based quantum gates
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...