The power of quantum computing technologies is based on the fundamentals of quantum
mechanics, such as quantum superposition, quantum entanglement, or the no-cloning …

Quantum technologies have the potential to solve certain computationally hard problems
with polynomial or super-polynomial speedups when compared to classical methods …

Quantum error correction is an indispensable ingredient for scalable quantum computing. In
this Perspective we discuss a particular class of quantum codes called “quantum low-density …

Open system quantum dynamics can generate a variety of long-range entangled mixed
states, yet it has been unclear in what sense they constitute phases of matter. To establish …

Photonics is the platform of choice to build a modular, easy-to-network quantum computer
operating at room temperature. However, no concrete architecture has been presented so …

Large-scale quantum computers have the potential to hold computational capabilities
beyond conventional computers. However, the physical qubits are prone to noise which …

Quantum computers are poised to radically outperform their classical counterparts by
manipulating coherent quantum systems. A realistic quantum computer will experience …

We construct a new explicit family of good quantum low-density parity-check codes which
additionally have linear time decoders. Our codes are based on a three-term chain (2 m× m) …

This article provides an introduction to surface code quantum computing. We first estimate
the size and speed of a surface code quantum computer. We then introduce the concept of …

We show that a simple modification of the surface code can exhibit an enormous gain in the
error correction threshold for a noise model in which Pauli Z errors occur more frequently …