The Mpemba effect, a counter-intuitive phenomenon where a hot system cools faster than a colder one, has been demonstrated in various classical systems. In this study, the authors propose and experimentally demonstrate an inverse Mpemba effect on a single trapped ion qubit, the simplest quantum system. They show that a cold qubit can heat up exponentially faster than a hot qubit, a phenomenon attributed to interference effects in coherent systems. The strong inverse Mpemba effect occurs only for sufficiently coherent qubits, making it a quantum mechanical phenomenon. The experimental setup involves a trapped ${}^{88}$Sr$^+$ ion qubit, where the qubit's dynamics are modeled using the Gorini-Kossakowski-Sudarshan-Lindblad equation. The authors measure the qubit's steady-state position on the Bloch sphere and track its relaxation over time. They find that the cold qubit reaches the steady state faster than the hot qubit, confirming the inverse Mpemba effect. This finding has implications for the design and operation of quantum information processing devices, as it reveals the fundamental nature of relaxation effects in simple quantum systems.The Mpemba effect, a counter-intuitive phenomenon where a hot system cools faster than a colder one, has been demonstrated in various classical systems. In this study, the authors propose and experimentally demonstrate an inverse Mpemba effect on a single trapped ion qubit, the simplest quantum system. They show that a cold qubit can heat up exponentially faster than a hot qubit, a phenomenon attributed to interference effects in coherent systems. The strong inverse Mpemba effect occurs only for sufficiently coherent qubits, making it a quantum mechanical phenomenon. The experimental setup involves a trapped ${}^{88}$Sr$^+$ ion qubit, where the qubit's dynamics are modeled using the Gorini-Kossakowski-Sudarshan-Lindblad equation. The authors measure the qubit's steady-state position on the Bloch sphere and track its relaxation over time. They find that the cold qubit reaches the steady state faster than the hot qubit, confirming the inverse Mpemba effect. This finding has implications for the design and operation of quantum information processing devices, as it reveals the fundamental nature of relaxation effects in simple quantum systems.