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# Quantum information theory

## Latest Articles

### Computer Scientists Prove That Heat Destroys Quantum Entanglement

While devising a new quantum algorithm, four researchers accidentally established a hard limit on entanglement.

### How Does Math Keep Secrets?

Cryptography is the thread that connects Julius Caesar, World War II and quantum computing, and it now lies under nearly every part of modern life. In this week’s episode, computer scientist Boaz Barak and co-host Janna Levin discuss the past and future of secrecy.

### Cryptographers Discover a New Foundation for Quantum Secrecy

Researchers have proved that secure quantum encryption is possible in a world without hard problems.

### The Best Qubits for Quantum Computing Might Just Be Atoms

In the search for the most scalable hardware to use for quantum computers, qubits made of individual atoms are having a breakout moment.

### What Is Quantum Teleportation?

Teleporting people through space is still science fiction. But quantum teleportation is dramatically different and entirely real. In this episode, Janna Levin interviews the theoretical physicist John Preskill about teleporting bits and the promise of quantum technology.

### Never-Repeating Tiles Can Safeguard Quantum Information

Two researchers have proved that Penrose tilings, famous patterns that never repeat, are mathematically equivalent to a kind of quantum error correction.

### Quantum Complexity Shows How to Escape Hawking’s Black Hole Paradox

Inside of a black hole, the two theoretical pillars of 20th-century physics appear to clash. Now a group of young physicists think they have resolved the conflict by appealing to the central pillar of the new century — the physics of quantum information.

### In New Paradox, Black Holes Appear to Evade Heat Death

The puzzling behavior of black hole interiors has led researchers to propose a new physical law: the second law of quantum complexity.

### Wormhole Experiment Called Into Question

Last fall, a team of physicists announced that they had teleported a qubit through a holographic wormhole in a quantum computer. Now another group suggests that’s not quite what happened.