In this paper, we show by computer simulations that a new material, which is a specific combination of the two semiconductors InAs and InSb (both are currently used in experimental setups on Majorana zero modes), has vastly improved properties compared to InAs or InSb alone, making it ideally suited for future devices. Moreover, we Read more
In this paper, published in Physical Review A, we show how to greatly improve success at solving Constraint Satisfaction Problems on a quantum computer by using a learned schedule, instead of the standard linear ramps. The technique actually improves as the problem gets larger and more difficult, allowing classical machines to learn optimizations that Read more
Topological materials can yield quasiparticles that behave in a manner similar to elementary particles that are part of the standard model of particle physics. In this paper, published in Physical Review X, we report on a new class of such quasiparticles—triple point fermions—which represent fermions that have mixed properties of Dirac and Weyl fermions. Read more
In this paper, which was just published in Physical Review B, a quantitative theory for the two-terminal conductance of a proximitized nanowire in the Coulomb blockade regime is developed. This theory allows one to understand and interpret the experimental data from the recent experiment by Charles Marcus’s group at Station Q Copenhagen that demonstrated Read more
The 2016 QRetreat took place on Microsoft’s Redmond campus on April 28 and 29, 2016. QRetreat is an annual meeting of the Station Q Santa Barbara and Station Q Redmond teams. The goals of the meeting are to update each other on the recent research in an informal atmosphere and discuss current projects. This Read more
LIQUi|> is a software architecture and tool suite for quantum computing. It includes a programming language, optimization and scheduling algorithms, and quantum simulators. LIQUi|> can be used to translate a quantum algorithm written in the form of a high-level program into the low-level machine instructions for a quantum device. LIQUi|> is developed by the Read more
In an external magnetic field, the energy of an electron in a two-dimensional system takes discrete values, called Landau levels. At high enough fields, all electrons in a solid can fit in the lowest Landau level. If exactly half of that level is filled with electrons, standard theory predicts that a special fermion liquid Read more
Recent improvements in the control of quantum systems make it seem feasible to finally build a quantum computer within a decade. While it has been shown that such a quantum computer can in principle solve certain small electronic structure problems and idealized model Hamiltonians, the highly relevant problem of directly solving a complex correlated Read more
Quantum information theory has the potential to revolutionize computation, cryptography, and simulation of quantum systems. However, quantum states are fragile, and unwanted interactions with the environment destroy the information before it can be manipulated successfully. Now, a breakthrough experiment by researchers affiliated with Station Q Copenhagen has demonstrated a key property of Majorana zero modes Read more
