Dynamically protected cat-qubits with quantum superconducting circuits
I will present a new hardware-efficient paradigm for encoding, protecting and manipulating quantum
information in a quantum harmonic oscillator, more specifically a cavity mode.
While an initial scheme  has allowed us to encode the quantum information on
a four-component Schrödinger cat state , a continuous monitoring of
photon-number parity observable  should lead to a protected quantum memory
. After briefly presenting these results, I will elaborate on how through a
multi-photon driven dissipative process and quantum Zeno dynamics, one can
extend this scheme towards a new paradigm for universal quantum computation
with protected logical qubits .
 Leghtas et al., Deterministic protocol for mapping a qubit to coherent
state superpositions in a cavity, Phys. Rev. A, 87: 042315, 2013.
 Vlastakis et al., Deterministically encoding quantum information using
100-photon Schrödinger cat states, Science 342: 607-610, 2013.
 Sun et al., Tracking photon jumps with repeated quantum non-demolition
parity measurements, 2013, ArXiv:1311.2534.
 Leghtas et al., Hardware-efficient autonomous quantum memory protection,
Phys. Rev. Lett., 111, 120501, 2013.
 Mirrahimi et al., Dynamically protected cat-qubits: a new paradigm for
universal quantum computation, 2013, ArXiv:1312.2017.
Subscribe to A Quantum Bit
Quantum physics began with revolutionary discoveries in the early twentieth century and continues to be central in today’s physics research. Learn about quantum physics, bit by bit. From definitions to the latest research, this is your portal. Subscribe to receive regular emails from the quantum world. Previous Issues...
Sign Up Now
Sign up to receive A Quantum Bit in your email!