$QUBT qubit

Latest papers

1. Logical CCZ state cultivation quant-ph · 14 Oct · 1 hit

   …of $1.84\times10^{-5}$ at $21.94\%$ acceptance and $4.10\times10^{-7}$ at $8.89\%$ acceptance for single-qubit, CZ, and CCZ error rates of $0.01\%$, $0.1\%$, and $0.5\%$, respectively. At the output-infidelity…

2. Gaussian and Qubit Semigroup Dynamics beyond GKSL quant-ph · 14 Oct · 2 hits

   …Brownian motion channel and corresponding master equations. Next we discuss a conceptually simpler family of qubit semigroup generators and identify parameter regions of completely positive, merely positive, and…

3. Loss-Tolerant Measurement-Device-Independent QKD over Untrusted Repeaters via High-Dimensional Time-Bin Multiplexing quant-ph · 14 Oct · 5 hits

   …quantum key distribution (MDI-QKD) protocol using time-bin-multiplexed single photons entangled with local qubits stored in nitrogen-vacancy (NV) centers. In each round, Alice and Bob each send a single multiplexed…

4. A low-cost compact muon detector for millikelvin operation physics.ins-det · 14 Oct · 1 hit

   Ionizing radiation produces correlated errors in superconducting qubits, posing some challenges to quantum error correction. In addition, it causes background events in other…

5. Joint-measurement advantage and finite-time transitions in accelerated detector registers quant-ph · 14 Oct · 1 hit

   …does not by itself specify what distributed measurements can recover. We study this distinction for a four-qubit cluster state whose two assisting nodes independently undergo generalized amplitude damping, while the…

6. Deterministic and Programmable Fusion for Scalable Generation of Photonic Graph States quant-ph · 14 Oct · 3 hits

   …sizes. The fusion operation is realized by nondestructively projecting pairs of flying microwave photonic qubits into Bell states using superconducting circuits with in-situ programmability. Crucially, the protocol…

7. On the structure of low-rank PPT entangled states violating Peres conjecture quant-ph · 14 Oct · 3 hits

   …V\'ertesi and Brunner can be obtained from UPB-complement states under invertible local filtering. For three qubits, in contrast, rank-four states that are PPT across every bipartition are separable across each cut.…

8. Quantum-enhanced Search for Galactic Dark Photons Using Cat-State Cavities hep-ph · 14 Oct · 1 hit

   …consisting of a high-$Q$ niobium cavity in the $\mathrm{TM}_{010}$ mode dispersively coupled to a transmon qubit. By preparing four-component cat states and performing repeated quantum non-demolition parity…